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AGREEMENT AND PLAN OF MERGER

AMONG

CHICAGO MERCANTILE EXCHANGE HOLDINGS INC.,

CBOT HOLDINGS, INC.

AND

BOARD OF TRADE OF THE CITY OF CHICAGO, INC.

DATED AS OF OCTOBER 17, 2006


AGREEMENT AND PLAN OF MERGER

This AGREEMENT AND PLAN OF MERGER, dated as of October 17, 2006 (this ''Agreement''), among CHICAGO MERCANTILE EXCHANGE HOLDINGS INC., a Delaware corporation (''CME Holdings''), CBOT HOLDINGS, INC., a Delaware corporation (''CBOT Holdings''), and BOARD OF TRADE OF THE CITY OF CHICAGO, INC., a Delaware non-stock corporation and subsidiary of CBOT Holdings (''CBOT''). CME Holdings, CBOT Holdings and CBOT are referred to individually as a ''Party'' and collectively as the ''Parties.''

RECITALS

WHEREAS, the Boards of Directors of CME Holdings, CBOT Holdings and CBOT have each determined that the transactions described herein are consistent with, and will further, their respective business strategies and goals, and have deemed it advisable and in the best interests of their respective companies, stockholders and members that CME Holdings and CBOT Holdings engage in a business combination;

WHEREAS, in furtherance thereof, the Boards of Directors of CME Holdings and CBOT Holdings have approved and declared advisable this Agreement and the merger of CBOT Holdings with and into CME Holdings (the ''Merger'') in accordance with the applicable provisions of the Delaware General Corporation Law (the ''DGCL'') and upon the terms and subject to the conditions set forth in this Agreement; and

WHEREAS, it is intended that, for U.S. federal income tax purposes, the Merger shall qualify as a reorganization under Section 368(a) of the Code.

NOW, THEREFORE, in consideration of the foregoing and their respective representations, warranties, covenants and agreements set forth in this Agreement, and intending to be legally bound hereby, the Parties agree as follows:

ARTICLE I

DEFINED TERMS; THE MERGER; CERTAIN RELATED MATTERS

Section 1.01 Certain Defined Terms. As used in this Agreement, the following terms have the meanings specified in this Section 1.1.

''Actual Cash Amount'' has the meaning set forth in Section 1.9(a)(ii).

''Affiliate'' means, with respect to any Person, another Person that directly or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with, such first Person, where ''control'' means the possession, directly or indirectly, of the power to direct or cause the direction of the management policies of a Person, whether through the ownership of voting securities, by contract, as trustee or executor or otherwise.

''Affiliate Agreement'' has the meaning set forth in Section 6.12.

''Agreement'' has the meaning set forth in the Preamble.

''ALTA'' means the American Land Title Association.

''Alternative Agreement'' has the meaning set forth in Section 6.5(a).

''Antitrust Division'' has the meaning set forth in Section 6.4(a).

''Antitrust Laws'' has the meaning set forth in Section 6.4(a)

''Available Cash Amount'' has the meaning set forth in Section 1.9(a)(ii).

''Available CBOT Holdings Stock Plan Shares'' has the meaning set forth in Section 1.11(d).

''Average CME Holdings Stock Price'' means the average closing sales price, rounded to four decimal points, of shares of CME Holdings Class A Common Stock on the NYSE (as reported in the Wall Street Journal, New York City edition) for the period of the ten consecutive trading days ending on the second full trading day prior to the Effective Time.

''Board of Directors'' means the board of directors of any specified Person.

''Book-Entry Shares'' has the meaning set forth in Section 2.1(a).

''Burdensome Condition'' has the meaning set forth in Section 6.4(c).

''Business Combination Transaction'' has the meaning set forth in Section 6.5(e).

''Business Day'' means any day except Saturday or Sunday on which commercial banks are not required or authorized to close in the City of Chicago.

''By-Laws'' has the meaning set forth in Section 1.5(b).

''Cancelled Shares'' has the meaning set forth in Section 1.9(d).

''Cash Fraction'' has the meaning set forth in Section 1.9(a)(ii).

''Cash Share'' has the meaning set forth in Section 1.9(a)(ii).

''CBOT'' has the meaning set forth in the Preamble.

''CBOT Holdings'' has the meaning set forth in the Preamble.

''CBOT Holdings Benefit Plans'' has the meaning set forth in Section 3.16(a).

''CBOT Holdings Class A Common Stock'' has the meaning set forth in Section 3.3(a).

''CBOT Holdings Class B Common Stock'' has the meaning set forth in Section 3.3(a).

''CBOT Holdings Common Stock'' has the meaning set forth in Section 3.3(a).

''CBOT Holdings Contracts'' has the meaning set forth in Section 3.19(b).

''CBOT Holdings Director Notice'' has the meaning set forth in Section 1.7(a).

''CBOT Holdings Directors'' has the meaning set forth in Section 1.7(a).

''CBOT Holdings Disclosure Letter'' has the meaning set forth in Article III.

''CBOT Holdings Financial Advisor'' has the meaning set forth in Section 3.23.

''CBOT Holdings Financial Statements'' means the consolidated financial statements of CBOT Holdings and the CBOT Holdings Subsidiaries included in the CBOT Holdings SEC Documents together, in the case of year-end statements, with reports thereon by Deloitte & Touche LLP, the independent auditors of CBOT Holdings, including in each case a consolidated balance sheet, a consolidated statement of income, a consolidated statement of stockholders equity and a consolidated statement of cash flows, and accompanying notes.

''CBOT Holdings Identified Representations'' means Section 3.3, Section 3.4 and Section 3.5.

''CBOT Holdings Improvements'' has the meaning set forth in Section 3.15(b)(ii).

''CBOT Holdings Leased Real Property'' means all real property interests leased by CBOT Holdings or any of the CBOT Holdings Subsidiaries pursuant to Leases.

''CBOT Holdings License Agreements'' has the meaning set forth in Section 3.19(a)(ix).

''CBOT Holdings Material Leases'' has the meaning set forth in Section 3.15(b)(v).

''CBOT Holdings Meetings'' has the meaning set forth in Section 6.2(a).

''CBOT Holdings Owned Intellectual Property'' has the meaning set forth in Section 3.18(a).

''CBOT Holdings Owned Real Property'' means real property, together with all improvements and fixtures presently or hereafter located thereon or attached or appurtenant thereto or owned by CBOT Holdings or any CBOT Holdings Subsidiary, and all easements, licenses, rights and appurtenances relating to the foregoing.

''CBOT Holdings Permits'' has the meaning set forth in Section 3.13(a).

''CBOT Holdings Preferred Stock'' has the meaning set forth in Section 3.3(a).

''CBOT Holdings Real Property'' has the meaning set forth in Section 3.15.

''CBOT Holdings Recommendation'' has the meaning set forth in Section 6.2(a).

''CBOT Holdings Rights'' means the rights distributed to the holders of CBOT Holdings Class A Common Stock pursuant to the CBOT Holdings Rights Agreement.

''CBOT Holdings Rights Agreement'' means the amended and restated rights agreement, dated as of September 14, 2006, between CBOT Holdings and Computershare Investor Services LLC, as rights agent.

''CBOT Holdings SEC Documents'' has the meaning set forth in Section 3.8(a).

''CBOT Holdings Special Committee'' means the special negotiating committee of the Board of Directors of CBOT Holdings that was formed in connection with the transactions contemplated by this Agreement.

''CBOT Holdings Stock Option'' has the meaning set forth in Section 1.11(a).

''CBOT Holdings Stock Plan'' has the meaning set forth in Section 1.11(a).

''CBOT Holdings Stock-Based Award'' has the meaning set forth in Section 1.11(b).

''CBOT Holdings Stockholder Approval'' has the meaning set forth in Section 3.4(a).

''CBOT Holdings Stockholders Meeting'' has the meaning set forth in Section 6.2(a).

''CBOT Holdings Subsidiary'' has the meaning set forth in Section 3.2(a).

''CBOT Membership Approval'' means (i) the approval of the Repurchase by the holders of a majority of the outstanding voting power of the Series B-1 and Series B-2 Membership Interests, (ii) the adoption of the Second Amended and Restated Certificate of Incorporation of CBOT in the form attached hereto as Exhibit C by the affirmative vote of the majority of the votes cast by the holders of the Series B-1 and Series B-2 Membership Interests at the CBOT Membership Meeting and (iii) the adoption of the Second Amended and Restated By-Laws of CBOT in the form attached hereto as Exhibit D by the affirmative vote of the majority of the votes cast by the holders of the Series B-1 and Series B-2 Membership Interests at the CBOT Membership Meeting; provided that for each such approval, (A) the holders of Series B-1 Memberships and Series B-2 Memberships shall be considered as a single class and (B) the holders of Series B-1 Memberships and Series B-2 Memberships shall have the voting rights provided in Article IV.C. of the certificate of incorporation of CBOT as currently in effect.

''CBOT Membership Meeting'' has the meaning set forth in Section 6.2(a).

''Certificate'' has the meaning set forth in Section 1.9(b).

''Certificate of Incorporation'' has the meaning set forth in Section 1.5(a).

''Certificate of Merger'' has the meaning set forth in Section 1.4.

''CFTC'' means the Commodity Futures Trading Commission.

''Change'' has the meaning set forth in Section 6.2(a).

''Change in Recommendation'' has the meaning set forth in Section 6.5(c)(I).

''Change in CBOT Holdings Recommendation'' has the meaning set forth in Section 6.2(a).

''Change in CME Holdings Recommendation'' has the meaning set forth in Section 6.2(b).

''Class A Membership'' means the one (1) Class A Membership in CBOT.

''Class B Memberships'' means, collectively, the Series B-1 Memberships, the Series B-2 Memberships, the Series B-3 Memberships, the Series B-4 Memberships and the Series B-5 Memberships in CBOT.

''Clayton Act'' means the Clayton Act of 1914, as amended, and the rules and regulations promulgated thereunder.

''Clearing Agreement'' has the meaning set forth in Section 6.17.

''Closing'' has the meaning set forth in Section 1.3.

''Closing Date'' has the meaning set forth in Section 1.3.

''CME'' means Chicago Mercantile Exchange Inc., a wholly owned subsidiary of CME Holdings.

''CME Common Stock'' has the meaning set forth in Section 4.3(c).

''CME Holdings'' has the meaning set forth in the Preamble.

''CME Holdings Benefit Plans'' has the meaning set forth in Section 4.14(a).

''CME Holdings Class A Common Stock'' has the meaning set forth in Section 4.3(a).

''CME Holdings Class B Common Stock'' has the meaning set forth in Section 4.3(a).

''CME Holdings Common Stock'' has the meaning set forth in Section 4.3(a).

''CME Holdings Contracts'' has the meaning set forth in Section 4.17(b).

''CME Holdings Directors'' has the meaning set forth in Section 1.7(a).

''CME Holdings Disclosure Letter'' has the meaning set forth in Article IV.

''CME Holdings Financial Advisors'' has the meaning set forth in Section 4.21.

''CME Holdings Financial Statements'' means the consolidated financial statements of CME Holdings and the CME Holdings Subsidiaries included in the CME Holdings SEC Documents together, in the case of year-end statements, with reports thereon by Ernst & Young LLP, the independent auditors of CME Holdings, including in each case a consolidated balance sheet, a consolidated statement of income, a consolidated statement of stockholders equity and a consolidated statement of cash flows, and accompanying notes.

''CME Holdings Identified Representations'' means Section 4.3 and Section 4.4.

''CME Holdings Improvements'' has the meaning set forth in Section 4.13(a).

''CME Holdings Leased Real Property'' means all real property interests leased by CME Holdings or any of the CME Holdings Subsidiaries pursuant to the Leases.

''CME Holdings License Agreements'' has the meaning set forth in Section 4.17(a)(ix).

''CME Holdings Material Lease'' has the meaning set forth in Section 4.13(a).

''CME Holdings Owned Intellectual Property'' has the meaning set forth in Section 4.16(a).

''CME Holdings Permits'' has the meaning set forth in Section 4.11(a).

''CME Holdings Preferred Stock'' has the meaning set forth in Section 4.3(a).

''CME Holdings Recommendation'' has the meaning set forth in Section 6.2(b).

''CME Holdings Rights'' means the rights distributed to the holders of CME Holdings Class A Common Stock and CME Holdings Class B Common Stock pursuant to the CME Holdings Rights Agreement.

''CME Holdings Rights Agreement'' means the rights agreement, dated as of November 30, 2001, as amended, between CME Holdings and Computershare Investor Services LLC, as rights agent.

''CME Holdings SEC Documents'' has the meaning set forth in Section 4.6(a).

''CME Holdings Stock Option'' has the meaning set forth in Section 1.11(a).

''CME Holdings Stock Plans'' has the meaning set forth in Section 4.3(b).

''CME Holdings Stock-Based Award'' has the meaning set forth in Section 1.11(b).

''CME Holdings Stockholder Approval'' has the meaning set forth in Section 4.4(a).

''CME Holdings Stockholders Meeting'' has the meaning set forth in Section 6.2(b).

''CME Holdings Subsidiary'' has the meaning set forth in Section 4.2(a).

''Code'' means the Internal Revenue Code of 1986, as amended, and the rules and regulations promulgated thereunder.

''Commodity Exchange Act'' means the Commodity Exchange Act, 7 U.S.C. §§ 1, et seq., as amended, and the rules and regulations promulgated thereunder.

''Confidentiality Agreement'' has the meaning set forth in Section 6.3(c).

''Constituent Documents'' means with respect to any entity, its certificate or articles of incorporation, by-laws, exchange rules and regulations, as applicable, and any similar charter or other organizational documents of such entity.

''Continuing Employees'' has the meaning set forth in Section 6.6(a).

''Copyrights'' has the meaning set forth in Section 3.18(k).

''Determination Date'' has the meaning set forth in Section 2.1(a).

''D & O Insurance'' has the meaning set forth in Section 6.8.

''DGCL'' has the meaning set forth in the Recitals.

''Effective Time'' has the meaning set forth in Section 1.4.

''Election Date'' has the meaning set forth in Section 1.10(d).

''Election Form'' has the meaning set forth in Section 1.10(a).

''Environmental Law'' means any foreign, federal, state or local law, treaty, statute, rule, regulation, order, ordinance, decree, injunction, judgment, governmental restriction or any other requirement of law (including common law) regulating or relating to the protection of human health, safety (as it relates to Releases of Hazardous Substances), natural resources or the environment, including laws relating to wetlands, pollution, contamination or the use, generation, management, handling, transport, treatment, disposal, storage, Release, threatened Release of, or exposure to, Hazardous Substances.

''Environmental Permit'' means any permit, license, authorization or consent required pursuant to applicable Environmental Laws.

''Equity Rights'' means, with respect to any Person, securities, or obligations convertible into or exercisable or exchangeable for, or giving any Person any right to subscribe for or acquire, or any options, calls, restricted stock, deferred stock awards, stock units, phantom awards, dividend equivalents, or commitments relating to, or any stock appreciation right or other instrument the value of which is determined in whole or in part by reference to the market price or value of, shares of capital stock or earnings of such Person, and shall include the CME Holdings Stock Options, CME Holdings Stock-Based Awards, CBOT Holdings Stock Options and CBOT Holdings Stock-Based Awards, as applicable, but shall not include the CBOT Holdings Rights.

''ERISA'' means the Employee Retirement Income Security Act of 1974, as amended, and the rules and regulations promulgated thereunder.

''ERISA Affiliate'' means, with respect to any entity, any trade or business, whether or not incorporated, that together with such entity and its Subsidiaries would be deemed a ''single employer'' within the meaning of Section 4001 of ERISA.

''Exchange Act'' means the Securities and Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

''Exchange Agent'' has the meaning set forth in Section 2.1(a).

''Exchange Ratio'' has the meaning set forth in Section 1.9(a)(i).

''Expenses'' has the meaning set forth in Section 6.7.

''Foreign Competition Laws'' has the meaning set forth in Section 3.7(b).

''Foreign CBOT Holdings Benefit Plan'' has the meaning set forth in Section 3.16(r).

''Foreign CME Holdings Benefit Plan'' has the meaning set forth in Section 4.14(p).

''Form S-4'' has the meaning set forth in Section 3.10.

''FTC'' has the meaning set forth in Section 6.4(a).

''GAAP'' has the meaning set forth in Section 3.8(b).

''Governmental Entity'' means any supranational, national, state, municipal, local or foreign government, any instrumentality, subdivision, court, administrative agency or commission, including the CFTC, or other governmental authority or instrumentality.

''Hazardous Substances'' means all substances defined as Hazardous Substances, Oils, Pollutants or Contaminants in the National Oil and Hazardous Substances Pollution Contingency Plan, 40 C.F.R. § 300.5, or toxic mold, or defined as such by, or regulated as such under, any Environmental Law.

''HSR Act'' has the meaning set forth in Section 3.7(b).

''Indebtedness'' means, with respect to any Person, without duplication, (i) all obligations of such Person and its Subsidiaries for borrowed money, or with respect to deposits or advances of any kind, (ii) all obligations of such Person and its Subsidiaries evidenced by bonds, debentures, notes, mortgages or similar instruments or securities, (iii) all obligations of such Person upon which interest charges are customarily paid (other than trade payables incurred in the ordinary course of business consistent with past practices), (iv) all obligations of such Person and its Subsidiaries under conditional sale or other title retention agreements relating to any property purchased by such Person or any of its Subsidiaries, (v) all obligations of such Person and its Subsidiaries issued or assumed as the deferred purchase price of property or services (excluding obligations of such Person and its Subsidiaries to creditors for inventory, services and supplies incurred in the ordinary course of business consistent with past practices), (vi) all lease obligations of such Person and its Subsidiaries capitalized on the books and records of such Person or any of its Subsidiaries, (vii) all obligations of others secured by a Lien on property or assets owned or acquired by such Person or any of its Subsidiaries, whether or not the obligations secured thereby have been assumed, (viii) all letters of credit or performance bonds issued for the account of such Person or any of its Subsidiaries (excluding (a) letters of credit issued for the benefit of suppliers to support accounts payable to suppliers incurred in the ordinary course of business consistent with past practices, (b) standby letters of credit relating to workers compensation insurance and surety bonds, (c) surety bonds and customs bonds and (d) clearing house guarantees) and (ix) all guarantees and arrangements having the economic effect of a guarantee of such Person or any of its Subsidiaries of any Indebtedness of any other Person, other than clearing house guarantees. Notwithstanding the foregoing, ''Indebtedness'' shall not include intercompany indebtedness, obligations or liabilities between either (i) CBOT Holdings or one of the wholly-owned CBOT Holdings Subsidiaries on the one hand, and another wholly-owned CBOT Holdings Subsidiary on the other hand, or (ii) CME Holdings or one of the wholly-owned CME Holdings Subsidiaries on the one hand, and another wholly-owned CME Holdings Subsidiary on the other hand.

''Indemnified Persons'' has the meaning set forth in Section 6.8.

''Intellectual Property'' has the meaning set forth in Section 3.18(k).

''IRS'' means the Internal Revenue Service.

''Joint Proxy Statement/Prospectus'' has the meaning set forth in Section 6.1(a).

''known'' or ''knowledge'' means, with respect to any Party, the knowledge of such Partys executive officers.

''Law'' (and with the correlative meaning ''Laws'') means any rule, regulation, statute, Order, ordinance or code promulgated by any Governmental Entity, including any common law, state and federal law, securities law and law of any foreign jurisdictions.

''Leases'' means leases, subleases, licenses and occupancy agreements.

''Liens'' means any mortgage, pledge, hypothecation, assignment, deposit arrangement, encumbrance, lien (statutory or other), other charge or security interest of any kind or nature whatsoever (including any conditional sale or other title retention agreement and any capital lease having substantially the same economic effect as any of the foregoing).

''Mailing Date'' has the meaning set forth in Section 1.10(a).

''Matching Bid'' has the meaning set forth in Section 6.5(c).

''Material Adverse Effect'' means, with respect to any entity, a material adverse effect on (i) the business, financial condition or results of operations of such entity and its Subsidiaries, taken as a whole, other than any such effect relating to or resulting from (A) changes or conditions generally affecting the economy or the financial, credit or securities markets, (B)political or regulatory conditions (including any changes thereto), to the extent such changes do not affect such entity and its Subsidiaries, taken as a whole, in a materially disproportionate manner relative to other participants in the businesses and industries in which such entity and its Subsidiaries operate, (C) changes in, or events or conditions effecting, any of the businesses and industries in which such entity and its Subsidiaries operate, to the extent such changes do not affect such entity and its Subsidiaries, taken as a whole, in a materially disproportionate manner relative to other participants in such businesses and industries, (D) changes, after the date hereof, in GAAP or the accounting rules or regulations of the SEC, to the extent such changes do not affect such entity and its Subsidiaries, taken as a whole, in a materially disproportionate manner relative to other participants in the businesses and industries in which such entity and its Subsidiaries operate, (E) the announcement of this Agreement, (F) actions expressly permitted by this Agreement or that are taken with the prior informed written consent of the other Party or (G) changes in any Law, to the extent such changes do not affect such entity and its Subsidiaries, taken as a whole, in a materially disproportionate manner relative to other participants in the businesses and industries in which such entity and its Subsidiaries operate or (ii) the ability of such entity to perform its obligations under this Agreement or to consummate the transactions contemplated by this Agreement.

''Maximum Annual Premium'' has the meaning set forth in Section 6.8.

''Members'' means the holders of the Membership Interests in CBOT.

''Membership Interests'' has the meaning set forth in Section 3.3(c).

''Merger'' has the meaning set forth in the Recitals.

''Merger Consideration'' has the meaning set forth in Section 1.9(a).

''Multiemployer Plan'' has the meaning set forth in Section 3.16(c).

''Nasdaq'' means the NASDAQ Global Select Market.

''No Election Shares'' has the meaning set forth in Section 1.10(b).

''NYSE'' means The New York Stock Exchange.

''Order'' means any charge, order, writ, injunction, judgment, decree, ruling, determination, directive, award or settlement, whether civil, criminal or administrative and whether formal or informal.

''Outside Date'' has the meaning set forth in Section 8.1(b)(i).

''Party'' or ''Parties'' has the meaning set forth in the Preamble.

''Patents'' has the meaning set forth in Section 3.18(k).

''Per Share Cash Consideration'' has the meaning set forth in Section 1.9(a)(ii).

''Permitted Liens'' means (i) any liens for taxes not yet delinquent or which are being contested in good faith by appropriate proceedings, (ii) carriers, warehousemens, mechanics, materialmens, repairmens or other similar liens, (iii) pledges or deposits in connection with workers compensation, unemployment insurance, and other social security legislation, (iv) easements, rights-of-way, restrictions and other similar encumbrances, which, in the aggregate, are not substantial in amount and which do not in any case materially detract from the value of the property subject thereto and (v) any Lien reflected in the CME Holdings Financial Statements or the CBOT Holdings Financial Statements (as applicable).

''Person'' means an individual, corporation, limited liability company, partnership, association, trust, unincorporated organization, other entity or group (as defined in the Exchange Act).

''Proceeding'' has the meaning set forth in Section 5.1(k).

''Release'' means any releasing, disposing, discharging, injecting, spilling, leaking, leaching, pumping, dumping, emitting, escaping, emptying, seeping, dispersal, migration, transporting, placing and the like, including the moving of any materials through, into or upon, any land, soil, surface water, groundwater or air, or otherwise entering into the indoor or outdoor environment.

''Representatives'' has the meaning set forth in Section 6.3.

''Repurchase'' means the repurchase by CBOT Holdings of the outstanding share of CBOT Holdings Class B Common Stock pursuant to the terms of the Voting Trust and the certificate of incorporation of CBOT Holdings.

''Restraint'' has the meaning set forth in Section 7.1(d).

''Sarbanes-Oxley Act'' has the meaning set forth in Section 3.8(a).

''SEC'' has the meaning set forth in Section 3.7(b).

''Securities'' means, with respect to any entity, the authorized shares of any series of capital stock of, or other equity interests or membership interests in, such entity.

''Securities Act'' means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

''Self-Regulatory Organization'' means any U.S. or foreign commission, board, agency or body that is not a Governmental Entity but is charged with regulating its own members through the adoption and enforcement of financial, sales practice and other requirements for brokers, dealers, securities underwriting or trading, stock exchanges, commodity exchanges, commodity intermediaries, electronic communications networks, insurance companies or agents, investment companies or investment advisers.

''Sherman Act'' means the Sherman Antitrust Act of 1890, as amended, and the rules and regulations promulgated thereunder.

''Software'' has the meaning set forth in Section 3.18(k).

''Stock Consideration'' has the meaning set forth in Section 1.9(a)(i).

''Stockholder Approval'' has the meaning set forth in Section 6.5(a).

''Stockholder Vote Option'' has the meaning set forth in Section 6.5(c)(II).

''Subsidiary'' when used with respect to any entity means any corporation or other organization, whether incorporated or unincorporated, (i) of which such entity or any other Subsidiary of such entity is a general partner (excluding partnerships, the general partnership interests of which are held by such entity or any Subsidiary of such entity do not have a majority of the voting interests in such partnership) or (ii) at least a majority of the Securities or other interests of which having by their terms ordinary voting power to elect a majority of the Board of Directors or others performing similar functions with respect to such corporation or other organization is directly or indirectly owned or controlled by such entity or by any one or more of its Subsidiaries, or by such entity and one or more of its Subsidiaries.

''Superior Proposal'' has the meaning set forth in Section 6.5(e).

''Surviving Entity'' has the meaning set forth in Section 1.2.

''Surviving Entity Chairman'' has the meaning set forth in Section 1.7(a).

''Surviving Entity Plans'' has the meaning set forth in Section 6.6(a).

''Surviving Entity Vice Chairman'' has the meaning set forth in Section 1.7(a).

''Takeover Proposal'' has the meaning set forth in Section 6.5(e).

''Tax'' (and with the correlative meaning ''Taxes'') means (i) any U.S. federal, state, local or foreign net income, franchise, gross income, sales, use, value added, goods and services, ad valorem, turnover, real property, personal property, gross receipts, net proceeds, license, capital stock, payroll, employment, unemployment, disability, customs duties, unclaimed property, withholding, social security (or similar), excise, severance, transfer, alternative or add-on minimum, stamp, estimated, registration, fuel, occupation, premium, environmental, excess profits, windfall profits taxes, or other tax of any kind and similar charges, fees, levies, imposts, duties, tariffs, licenses or other assessments, together with any interest and any penalties, additions to tax or additional amounts imposed by any Taxing Authority or Governmental Entity, (ii) any liability for payment of amounts described in clause (i) whether as a result of transferee liability, of being a member of an affiliated, consolidated, combined or unitary group for any period, transferor liability, successor liability or otherwise through operation of law, and (iii) any liability for the payment of amounts described in clauses (i) or (ii) as a result of any tax sharing, tax indemnity or tax allocation agreement or any other express or implied agreement to indemnify any other person.

''Tax Return'' means any return, report, declaration, election, estimate, information statement, claim for refund, or other document (including any related or supporting information and any amendment to any of the foregoing) filed or required to be filed with respect to Taxes.

''Taxing Authority'' means, with respect to any Tax, the Governmental Entity that imposes such Tax, and the agency (if any) charged with the collection of such Tax for such Governmental Entity.

''Termination Fee'' has the meaning set forth in Section 8.3(a).

''Third Party'' has the meaning set forth in Section 6.5(e).

''Trade Secrets'' has the meaning set forth in Section 3.18(k).

''Trademarks'' has the meaning set forth in Section 3.18(k).

''U.S.'' means the United States of America.

''Voting Trust'' means the Subsidiary Voting Trust Agreement, dated as of October 12, 2005, among CBOT Holdings, CBOT and Wilmington Trust Company, a Delaware banking corporation, as trustee, as amended.

''WARN Act'' has the meaning set forth in Section 3.17(g).

Section 1.2 The Merger. Upon the terms and subject to the conditions set forth in this Agreement, at the Effective Time, CBOT Holdings shall be merged with and into CME Holdings and the separate corporate existence of CBOT Holdings shall thereupon cease. CME Holdings shall be the surviving entity in the Merger (with respect to all post-Closing periods, the ''Surviving Entity''). At the Effective Time, the effect of the Merger shall be as provided in this Agreement, the Certificate of Merger and the applicable provisions of the DGCL.

Section 1.3 Closing. The closing of the Merger (the ''Closing'') shall take place at the offices of Skadden, Arps, Slate, Meagher & Flom LLP, 333 West Wacker Drive, Chicago, Illinois, at 9:00 a.m., Chicago time, on the date when the Effective Time is to occur (the ''Closing Date'').

Section 1.4 Effective Time. Subject to the provisions of this Agreement, on the Closing Date, CME Holdings and CBOT Holdings shall file a certificate of merger as contemplated by the DGCL (the ''Certificate of Merger'') with the Secretary of State of the State of Delaware, in such form as required by, and executed in accordance with, the DGCL. The Merger shall become effective at such time as the Certificate of Merger is duly filed with such Secretary of State on the Closing Date, or at such other time as CME Holdings and CBOT Holdings shall agree and specify in the Certificate of Merger. Subject to the provisions of this Agreement, unless otherwise mutually agreed upon by CME Holdings and CBOT Holdings, CME Holdings and CBOT Holdings shall cause the Effective Time to occur on the fifth Business Day after all of the conditions set forth in Article VII have been fulfilled or waived (other than those conditions that by their nature are to be satisfied at the Closing, but subject to the fulfillment or waiver of those conditions). As used herein, the ''Effective Time'' shall mean the time at which the Merger shall become effective.

Section 1.5 Surviving Entity Constituent Documents.

(a) The certificate of incorporation of the Surviving Entity (the ''Certificate of Incorporation'') shall be in the form attached hereto as Exhibit A (it being understood that, in preparing the final version of such document, the Parties shall complete the blanks represented by bracketed language in the manner contemplated by such bracketed language and this Agreement), until thereafter changed or amended as provided therein or by applicable Law.

(b) The by-laws of the Surviving Entity (the ''By-Laws'') shall be in the form attached hereto as Exhibit B (it being understood that, in preparing the final version of such document, the Parties shall complete the blanks represented by bracketed language in the manner contemplated by such bracketed language and this Agreement), until thereafter changed or amended as provided therein or by applicable Law.

Section 1.6 CBOT Constituent Documents.

(a) Concurrently with the Effective Time, the Amended and Restated Certificate of Incorporation of CBOT shall be amended and restated in the form attached hereto as Exhibit C (it being understood that, in preparing the final version of such document, the Parties shall complete the blanks represented by bracketed language in the manner contemplated by such bracketed language and this Agreement), until thereafter changed or amended as provided therein or by applicable Law.

(b) Concurrently with the Effective Time, the Amended and Restated Bylaws of CBOT shall be amended and restated in the form attached hereto as Exhibit D (it being understood that, in preparing the final version of such document, the Parties shall complete the blanks represented by bracketed language in the manner contemplated by such bracketed language and this Agreement), until thereafter changed or amended as provided therein or by applicable Law.

Section 1.7 Directors.

(a) At the Effective Time, as reflected in the Certificate of Incorporation and By-Laws, the number of directors of the Surviving Entity shall be twenty-nine (29), consisting of twenty (20) directors of CME Holdings as of immediately prior to the Effective Time (the ''CME Holdings Directors'') and nine (9) directors of CBOT Holdings as of immediately prior to the Effective Time (the ''CBOT Holdings Directors''). At least ten (10) Business Days prior to the Effective Time, CBOT Holdings shall deliver in writing to CME Holdings (the ''CBOT Holdings Director Notice'') the names of the CBOT Holdings Directors (it being understood that one of the CBOT Holdings Directors shall be the Chairman of the Board of Directors of CBOT Holdings immediately prior to the Effective Time and at least two of the CBOT Holdings Directors shall be Non-Industry Directors (as defined in the By-Laws)). The CBOT Holdings Director Notice shall identify (i) which CBOT Holdings Directors shall be members of the Executive Committee of the Board of Directors of the Surviving Entity in accordance with Section 1.7(b) and (ii) which CBOT Holdings Directors shall be members of the Nominating Committee of the Board of Directors of the Surviving Entity in accordance with Section 1.7(c). The CBOT Holdings Directors shall be allocated among the different classes of directors of the Surviving Entity as may be mutually agreed by CBOT Holdings and CME Holdings so that (i) the classes of directors expiring at the next two annual meetings of the stockholders of the Surviving Entity after the Effective Time have ten (10) directors and (ii) the other class of directors has nine (9) directors. Immediately following the Effective Time, the Chairman of the Board of Directors of CME Holdings immediately prior to the Effective Time shall serve as the Chairman of the Board of Directors of the Surviving Entity (the ''Surviving Entity Chairman'') and the Chairman of the Board of Directors of CBOT Holdings immediately prior to the Effective Time shall serve as Vice Chairman of the Board of Directors of the Surviving Entity (the ''Surviving Entity Vice Chairman''). Subject to Article X of the By-Laws, each director shall hold office until his or her successor has been duly elected or appointed and qualified or until his or her earlier death, resignation or removal in accordance with the Certificate of Incorporation, the By-Laws and applicable Law.

(b) At the Effective Time, as reflected in the By-Laws, the Executive Committee of the Board of Directors of the Surviving Entity shall be comprised of eight (8) directors, consisting of five (5) CME Holdings Directors and the three (3) CBOT Holdings Directors identified in the CBOT Holdings Director Notice. Immediately following the Effective Time, as reflected in the By-Laws, the Surviving Entity Chairman shall serve as the Chairman of the Executive Committee and the Surviving Entity Vice Chairman shall serve as the Vice Chairman of the Executive Committee.

(c) At the Effective Time, as reflected in the By-Laws, the Nominating Committee of the Board of Directors of the Surviving Entity shall be comprised of six (6) directors, consisting of four (4) CME Holdings Directors and the two (2) CBOT Holdings Directors identified in the CBOT Holdings Director Notice.

Section 1.8 Officers. Subject to Section 1.7(a), the officers of CME Holdings immediately prior to the Effective Time shall, from and after the Effective Time, be the officers of the Surviving Entity until their successors have been duly elected or appointed and qualified or until their earlier death, resignation or removal in accordance with the Certificate of Incorporation and the By-Laws.

Section 1.9 Effect on Capital Stock.

(a) At the Effective Time, subject to the other provisions of Article I and Article II, each share of CBOT Holdings Class A Common Stock issued and outstanding immediately prior to the Effective Time (other than shares of CBOT Holdings Class A Common Stock owned by CME Holdings or CBOT Holdings or any of their respective wholly-owned subsidiaries), together with the CBOT Holdings Rights attached thereto or associated therewith, shall, by virtue of this Agreement and without any action on the part of the holder thereof, be converted into and shall thereafter represent the right to receive the following consideration (collectively, the ''Merger Consideration''):

(i) Each share of CBOT Holdings Class A Common Stock with respect to which an election to receive Stock Consideration is properly made and not revoked or lost pursuant to Section 2.1 and each No Election Share shall be converted into the right to receive .3006 shares (the ''Exchange Ratio'') of CME Holdings Class A Common Stock, together with the CME Holdings Rights attached thereto or associated therewith and subject to adjustment in accordance with Section 1.9(c) (the ''Stock Consideration''); and

(ii) Each share of CBOT Holdings Class A Common Stock with respect to which an election to receive cash has been properly made and not revoked or lost pursuant to Section 2.1 (each, a ''Cash Share'') shall be converted (provided that the Available Cash Amount equals or exceeds the Actual Cash Amount) into the right to receive an amount in cash, without interest, equal to the product determined by multiplying the Exchange Ratio by the Average CME Holdings Stock Price (the ''Per Share Cash Consideration''); if, however, (A) the product of the number of Cash Shares and the Per Share Cash Consideration (such product being the ''Actual Cash Amount'') exceeds (B) $3.0 billion (the ''Available Cash Amount''), then each Cash Share shall be converted into a right to receive (1) an amount of cash (without interest) equal to the product of (p) the Per Share Cash Consideration and (q) a fraction, the numerator of which shall be the Available Cash Amount and the denominator of which shall be the Actual Cash Amount (such fraction being the ''Cash Fraction'') and (2) a number of shares of CME Holdings Class A Common Stock equal to the product of (r) the Exchange Ratio and (s) one (1) minus the Cash Fraction.

(b) From and after the Effective Time, all of the shares of CBOT Holdings Class A Common Stock, and associated CBOT Holdings Rights, converted into the Merger Consideration pursuant to this Article I shall no longer be outstanding and shall automatically be cancelled and retired and shall cease to exist, and each holder of a certificate (each a ''Certificate'') previously representing any such shares of CBOT Holdings Class A Common Stock shall thereafter cease to have any rights with respect to such securities, except the right to receive (i) the Merger Consideration and (ii) any dividends and other distributions in accordance with Section 2.1(f).

(c) If at any time during the period between the date of this Agreement and the Effective Time, any change in the outstanding shares of capital stock of CME Holdings or CBOT Holdings shall occur by reason of any reclassification, recapitalization, stock split or combination, exchange or readjustment of shares, or any stock dividend thereon with a record date during such period, the Merger Consideration, the Exchange Ratio, the Stock Consideration, the Per Share Cash Consideration, and any other similarly dependent items, as the case may be, shall be appropriately adjusted to provide the holders of shares of CBOT Holdings Class A Common Stock the same economic effect as contemplated by this Agreement prior to such event.

(d) At the Effective Time, all shares of CBOT Holdings Class A Common Stock that are owned by CME Holdings or CBOT Holdings or any of their respective wholly-owned Subsidiaries (the ''Cancelled Shares'') shall be cancelled and retired and shall cease to exist and no stock of CME Holdings, cash or other consideration shall be delivered in exchange therefor.

(e) This Agreement is intended to meet the requirements of Treasury Regulation section 1.368-1(e) (including Treasury Regulation section 1.368-l(e)(2)(iii)(B)(1)(ii)) and shall be interpreted in a manner consistent therewith, such that in no event shall the value of CBOT Holdings Class A Common Stock (included for purposes of ''continuity of interest'' within the meaning of Treasury Regulation section 1.368-l(e)) exchanged for CME Holdings Class A Common Stock (based on the fair market value of CME Holdings Class A Common Stock as of the last Business Day before the execution of this Agreement) constitute less than 45% of the proprietary interests in CBOT Holdings.

Section 1.10 Election Procedures.

(a) An election form and other appropriate and customary transmittal materials (which shall specify that delivery shall be effected, and risk of loss and title to the Certificates theretofore representing shares of CBOT Holdings Class A Common Stock shall pass, only upon proper delivery of such Election Form and Certificates to the Exchange Agent) in such form as CBOT Holdings and CME Holdings shall reasonably agree (the ''Election Form'') shall be mailed with the Joint Proxy Statement/Prospectus (the date of such mailing being referred to as the ''Mailing Date'') to each holder of record as of the record date for the CBOT Holdings Stockholders Meeting.

(b) Each Election Form shall permit the holder (or the beneficial owner through appropriate and customary documentation and instructions) to specify (i) the number of shares of such holders CBOT Holdings Class A Common Stock with respect to which such holder elects to receive the Stock Consideration, (ii) the number of shares of such holders CBOT Holdings Class A Common Stock with respect to which such holder elects to receive the Per Share Cash Consideration or (iii) that such holder makes no election with respect to such holders shares of CBOT Holdings Class A Common Stock (''No Election Shares''). Any CBOT Holdings Class A Common Stock with respect to which the Exchange Agent has not received an effective, properly completed Election Form on or before 5:00 p.m., Chicago time, on the Election Date shall also be deemed to be No Election Shares.

(c) CME Holdings shall make available one or more Election Forms as may reasonably be requested from time to time by all Persons who become holders (or beneficial owners) of CBOT Holdings Class A Common Stock between the record date for the CBOT Holdings Stockholders Meeting and the close of business on the Business Day prior to the Election Date, and CBOT Holdings shall provide to the Exchange Agent all information reasonably necessary for it to perform as specified herein.

(d) Any record holders election shall have been properly made only if the Exchange Agent shall have received at its designated office, by 5:00 p.m., New York City time, on the date specified on the Election Form as agreed upon by the parties, or if no such date is specified, on the later of (1) the date of the CBOT Holdings Stockholders Meeting or (2) if the Effective Time is more than four Business Days following the CBOT Holdings Stockholders Meeting, three Business Days preceding the Effective Time (the ''Election Date''), an Election Form properly completed and signed and accompanied by (i) Certificates representing the shares of CBOT Holdings Common Stock to which such Election Form relates, duly endorsed in blank or otherwise in form acceptable for transfer on the books of CBOT Holdings (or by an appropriate guarantee of delivery of such Certificates as set forth in such Election Form from a firm that is an ''eligible guarantor institution'' (as defined in Rule 17Ad-15 under the Exchange Act); provided that such Certificates are in fact delivered to the Exchange Agent by the time set forth in such guarantee of delivery) or (ii) in the case of CBOT Holdings Book-Entry Shares, any additional documents required by the procedures set forth in the Election Form. After an election is validly made with respect to any shares of CBOT Holdings Class A Common Stock, no further registration of transfers of such shares shall be made on the stock transfer books of CBOT Holdings, unless and until such election is properly revoked.

(e) CME Holdings and CBOT Holdings shall publicly announce the anticipated Election Date at least five Business Days prior to the anticipated Effective Time. If the Effective Time is delayed to a subsequent date, the Election Date shall be similarly delayed to a subsequent date, and CME Holdings and CBOT Holdings shall promptly announce any such delay and, when determined, the rescheduled Election Date.

(f) Any election may be revoked with respect to all or a portion of the shares of CBOT Holdings Class A Common Stock subject thereto by the holder who submitted the applicable Election Form by written notice received by the Exchange Agent prior to 5:00 p.m., New York City time, on the Election Date. In the event an Election Form is revoked prior to the Election Date, the shares of CBOT Holdings Class A Common Stock represented by such Election Form shall become No Election Shares and CME Holdings shall cause the Certificates representing such shares of CBOT Holdings Class A Common Stock to be promptly returned without charge to the Person submitting the Election Form upon written request to that effect from the holder who submitted the Election Form, except to the extent (if any) a subsequent election is properly made with respect to any or all of such shares of CBOT Holdings Class A Common Stock. In addition, all elections shall automatically be revoked if this Agreement is terminated in accordance with Article VIII.

Section 1.11 Treatment of CBOT Holdings Equity-Based Awards.

(a) Each option to purchase shares of CBOT Holdings Class A Common Stock (a ''CBOT Holdings Stock Option'') granted under the 2005 Long-Term Equity Incentive Plan or any other equity or equity-based compensation plan of CBOT Holdings (each, a ''CBOT Holdings Stock Plan''), whether vested or unvested, that is outstanding and unexercised immediately prior to the Effective Time shall cease, at the Effective Time, to represent a right to acquire shares of CBOT Holdings Class A Common Stock and shall be converted at the Effective Time, without any action on the part of any holder of any CBOT Holdings Stock Option, into an option to purchase a share of CME Holdings Class A Common Stock (a ''CME Holdings Stock Option''), together with the CME Holdings Rights attached thereto or associated therewith, on the same terms and conditions as were applicable under such CBOT Holdings Stock Option (but taking into account any changes thereto, including any acceleration or vesting thereof, provided for in the relevant CBOT Holdings Stock Plan, or in the related award document (including any employment agreement and the retention policy set forth in Section 5.1(h) of the CBOT Holdings Disclosure Letter) by reason of the transactions contemplated hereby). The number of shares of CME Holdings Class A Common Stock subject to each such CBOT Holdings Stock Option shall be equal to the number of shares of CBOT Holdings Class A Common Stock subject to each such CBOT Holdings Stock Option multiplied by the Exchange Ratio, rounded down to the nearest whole share of CME Holdings Class A Common Stock, and such CME Holdings Stock Option shall have an exercise price per share (rounded up to the nearest cent) equal to the per share exercise price specified in such CBOT Holdings Stock Option divided by the Exchange Ratio; provided that, in the case of any CBOT Holdings Stock Option to which Section 421 of the Code applies as of the Effective Time (after taking into account the effect of any accelerated vesting thereof, if applicable) by reason of its qualification under Section 422 or Section 423 of the Code, the exercise price, the number of shares of CME Holdings Class A Common Stock subject to such option and the terms and conditions of exercise of such option shall be determined in a manner consistent with the requirements of Section 424(a) of the Code; provided, further, that, in the case of any CBOT Holdings Stock Option to which Section 409A of the Code applies as of the Effective Time, the exercise price, the number of shares of CME Holdings Class A Common Stock subject to such option and the terms and conditions of exercise of such option shall be determined in a manner consistent with the requirements of Section 409A of the Code.

(b) At the Effective Time, each Equity Right consisting of, based on or relating to shares of CBOT Holdings Class A Common Stock granted under a CBOT Holdings Stock Plan, other than CBOT Holdings Stock Options (each, a ''CBOT Holdings Stock-Based Award''), whether contingent or accrued, which is outstanding immediately prior to the Effective Time shall cease, at the Effective Time, to represent an Equity Right with respect to shares of CBOT Holdings Class A Common Stock and shall be converted without any action on the part of any holder of an Equity Right, at the Effective Time, into an Equity Right consisting of, based on or relating to shares of CME Holdings Class A Common Stock granted under a CME Holdings Stock Plan, other than CME Holdings Stock Options (each, a ''CME Holdings Stock-Based Award''), on the same terms and conditions as were applicable under the CBOT Holdings Stock-Based Awards (but taking into account any changes thereto, including any acceleration or vesting thereof, provided for in the relevant CBOT Holdings Stock Plan or in the related award document (including any employment agreement and the retention policy set forth in Section 5.1(h) of the CBOT Holdings Disclosure Letter) by reason of the transactions contemplated hereby). The number of shares of CME Holdings Class A Common Stock subject to each such CME Holdings Stock-Based Award shall be equal to the number of shares of CBOT Holdings Class A Common Stock subject to the CBOT Holdings Stock-Based Award multiplied by the Exchange Ratio, rounded down to the nearest whole share of CME Holdings Class A Common Stock and, if applicable, such CME Holdings Stock-Based Award shall have an exercise price per share (rounded up to the nearest cent) equal to the per share exercise price specified in the CBOT Holdings Stock-Based Award divided by the Exchange Ratio. Any dividend equivalents credited to the account of each holder of a CBOT Holdings Stock-Based Award as of the Effective Time shall remain credited to such holders account immediately following the Effective Time, subject to adjustment in accordance with the foregoing.

(c) As soon as practicable after the Effective Time, CME Holdings shall deliver to the holders of CBOT Holdings Stock Options and CBOT Holdings Stock-Based Awards any required notices setting forth such holders rights pursuant to the relevant CBOT Holdings Stock Plans and award documents and stating that such CBOT Holdings Stock Options and CBOT Holdings Stock-Based Awards have been assumed by CME Holdings and shall continue in effect on the same terms and conditions (subject to the adjustments required by this Section 1.11 after giving effect to the Merger and the terms of the relevant CBOT Holdings Stock Plans).

(d) Following the Effective Time, CME Holdings may maintain the CBOT Holdings Stock Plans for purposes of granting future awards in accordance with NYSE and Nasdaq rules. If any CBOT Holdings Stock Plans are so maintained, the provisions of such CBOT Holdings Stock Plans, including the respective terms of such plans, shall not be changed by the Surviving Entity, except that (i) all Equity Rights issued by CME Holdings pursuant to the CBOT Holdings Stock Plans following the Effective Time shall be Equity Rights in respect of CME Holdings Class A Common Stock, (ii) all references to CBOT Holdings (other than any references relating to a ''change in control'' of CBOT Holdings) in each CBOT Holdings Stock Plan and in each agreement evidencing any award thereunder shall be deemed to refer to CME Holdings, unless CME Holdings determines otherwise and (iii) the number of shares of CME Holdings Class A Common Stock available for future issuance pursuant to each CBOT Holdings Stock Plan following the Effective Time (the ''Available CBOT Holdings Stock Plan Shares'') shall be equal to the number of shares of CBOT Holdings Class A Common Stock so available immediately prior to the Effective Time multiplied by the Exchange Ratio, rounded down to the nearest whole share of CME Holdings Class A Common Stock.

(e) Prior to the Effective Time, CBOT Holdings shall take all necessary action for the adjustment of CBOT Holdings Stock Options and CBOT Holdings Stock-Based Awards under this Section 1.11. CME Holdings shall reserve for future issuance a number of shares of CME Holdings Class A Common Stock at least equal to the number of shares of CME Holdings Class A Common Stock that will be subject to CME Holdings Stock Options and CME Holdings Stock-Based Awards as a result of the actions contemplated by this Section 1.11, plus the number of Available CBOT Holdings Stock Plan Shares in the event that CME Holdings maintains the CBOT Holdings Stock Plans as contemplated by this Section 1.11. As soon as practicable following the Effective Time, CME Holdings shall file a registration statement on Form S-8 or S-3, as the case dictates (or any successor form, or if Form S-8 or S-3 is not available, other appropriate forms), with respect to the shares of CME Holdings Class A Common Stock subject to such CME Holdings Stock Options and CME Holdings Stock-Based Awards (and the Available CBOT Holdings Stock Plan Shares, as the case dictates) and shall maintain the effectiveness of such registration statement or registration statements (and maintain the current status of the prospectus or prospectuses contained therein) for so long as such CME Holdings Stock Options and CME Holdings Stock-Based Awards remain outstanding.

Section 1.12 Appraisal Rights. The parties hereto agree that, in accordance with Section 262 of the DGCL, no appraisal rights will be available to holders of shares of CBOT Holdings Class A Common Stock in connection with the Merger.

Section 1.13 Associated Rights. References in Article I and Article II of this Agreement to CBOT Holdings Class A Common Stock shall include, unless the context requires otherwise, the associated CBOT Holdings Rights.

ARTICLE II

EXCHANGE OF CERTIFICATES

Section 2.1 Surrender and Payment.

(a) Prior to the Mailing Date, CME Holdings shall appoint an exchange agent reasonably acceptable to CBOT Holdings (the ''Exchange Agent'') for the purpose of exchanging Certificates representing shares of CBOT Holdings Class A Common Stock and non-certificated shares represented by book entry (''Book-Entry Shares'') for the Merger Consideration. Promptly after the Effective Time, but in no event more than three (3) Business Days thereafter, the Surviving Entity will send, or will cause the Exchange Agent to send, to each holder of record of shares of CBOT Holdings Class A Common Stock as of the Effective Time (other than any holder which has previously and properly surrendered all of its Certificate(s) to the Exchange Agent in accordance with Section 1.10 ), a letter of transmittal for use in such exchange (which shall specify that the delivery shall be effected, and risk of loss and title shall pass, only upon proper delivery of the Certificates to the Exchange Agent) in such form as CBOT Holdings and CME Holdings may reasonably agree, for use in effecting delivery of shares of CBOT Holdings Class A Common Stock to the Exchange Agent. As promptly as practicable after the Election Date (and in no event later than three (3) Business Days after the Election Date), the Exchange Agent shall determine the Actual Cash Amount and the allocation of Merger Consideration and shall notify CME Holdings of such determination (the date of such determination, the ''Determination Date''). At the Effective Time, CME Holdings shall deposit with the Exchange Agent (i) the number of shares of CME Holdings Class A Common Stock (including fractional shares) to be delivered as Stock Consideration in respect of the No Election Shares and the shares of CBOT Holdings Class A Common Stock for which an election to receive stock consideration is properly made and not revoked or lost pursuant to this Section 2.1, (ii) the number of shares of CME Holdings Class A Common Stock (including fractional shares) as shall be necessary to deliver the Stock Consideration in respect of the shares of CBOT Holdings Class A Common Stock for which an election to receive the Stock Consideration is properly made and not revoked or lost pursuant to this Section 2.1, and (iii) the Available Cash Amount. CME Holdings shall also make sufficient funds available to the Exchange Agent from time to time as needed to pay cash in respect of dividends or other distributions contemplated by Section 2.1(f). Exchange of any Book-Entry Shares shall be effected in accordance with CME Holdings customary procedures with respect to securities represented by book entry.

(b) Each holder of shares of CBOT Holdings Class A Common Stock that have been converted into a right to receive the Merger Consideration, upon surrender to the Exchange Agent of a Certificate, together with a properly completed letter of transmittal, will be entitled to receive (A) one or more certificates of CME Holdings Class A Common Stock (which shall be in non-certificated book-entry form unless a physical certificate is requested) representing, in the aggregate, the number of shares of CME Holdings Class A Common Stock, if any, that such holder has the right to receive pursuant to Section 1.9 and (B) a check in the amount equal to the cash portion of the Merger Consideration, if any, that such holder has the right to receive pursuant to Section 1.9 and this Article II, including dividends and other distributions payable pursuant to Section 2.1(f). The Merger Consideration shall be paid as promptly as practicable after receipt by the Exchange Agent of the Certificate and letter of transmittal in accordance with the foregoing. No interest shall be paid or accrued on any Merger Consideration or on any unpaid dividends and distributions payable to holders of Certificates. Until so surrendered, each such Certificate shall, after the Effective Time, represent for all purposes only the right to receive such Merger Consideration.

(c) If any portion of the Merger Consideration is to be registered in the name of a Person other than the Person in whose name the applicable surrendered Certificate is registered, it shall be a condition to the registration thereof that the surrendered Certificate shall be properly endorsed or otherwise be in proper form for transfer and that the Person requesting such delivery of the Merger Consideration shall pay to the Exchange Agent any transfer or other similar Taxes required as a result of such registration in the name of a Person other than the registered holder of such Certificate or establish to the satisfaction of the Exchange Agent that such Tax has been paid or is not payable.

(d) After the Effective Time, there shall be no further registration of transfers of shares of CBOT Holdings Class A Common Stock. If, after the Effective Time, Certificates are presented to the Exchange Agent or the Surviving Entity, they shall be canceled and exchanged for the consideration provided for, and in accordance with the procedures set forth in this Article II.

(e) Any portion of the Merger Consideration made available to the Exchange Agent pursuant to Section 2.1(a) that remains unclaimed by the holders of shares of CBOT Holdings Class A Common Stock one year after the Effective Time shall be returned to the Surviving Entity, upon demand, and any such holder who has not exchanged his or her shares of CBOT Holdings Class A Common Stock for the Merger Consideration in accordance with this Section 2.1 prior to that time shall thereafter look only to the Surviving Entity for delivery of the Merger Consideration in respect of such holders shares. Notwithstanding the foregoing, the Surviving Entity shall not be liable to any holder of shares for any Merger Consideration properly delivered to a public official pursuant to applicable abandoned property laws. Any Merger Consideration remaining unclaimed by holders of shares of CBOT Holdings Class A Common Stock immediately prior to such time as such amounts would otherwise escheat to or become property of any Governmental Entity shall, to the extent permitted by applicable Law, become the property of the Surviving Entity free and clear of any claims or interest of any Person previously entitled thereto.

(f) No dividends or other distributions with respect to shares of CME Holdings Class A Common Stock issued in the Merger shall be paid to the holder of any unsurrendered Certificates or Book-Entry Shares until such Certificates or Book-Entry Shares are surrendered as provided in this Section 2.1. Following such surrender, there shall be paid, without interest, to the record holder of the shares of CME Holdings Class A Common Stock issued in exchange therefor (i) at the time of such surrender, all dividends and other distributions payable in respect of such shares of CME Holdings Class A Common Stock with a record date after the Effective Time and a payment date on or prior to the date of such surrender and not previously paid and (ii) at the appropriate payment date, the dividends or other distributions payable with respect to such shares of CME Holdings Class A Common Stock with a record date after the Effective Time but with a payment date subsequent to such surrender. For purposes of dividends or other distributions in respect of shares of CME Holdings Class A Common Stock, all shares of CME Holdings Class A Common Stock to be issued pursuant to the Merger shall be entitled to dividends pursuant to the immediately preceding sentence as if issued and outstanding as of the Effective Time.

Section 2.2 [Reserved.]

Section 2.3 Lost Certificates. If any Certificate shall have been lost, stolen or destroyed, upon the making of an affidavit of that fact by the Person claiming such Certificate to be lost, stolen or destroyed and, if required by the Surviving Entity, the posting by such Person of a bond, in such reasonable amount as the Surviving Entity may direct, as indemnity against any claim that may be made against it with respect to such Certificate, the Exchange Agent will issue in exchange for such lost, stolen or destroyed Certificate the Merger Consideration to be paid in respect of the shares of CBOT Holdings Class A Common Stock represented by such Certificate as contemplated by this Article II.

Section 2.4 Withholding Rights. Each of the Exchange Agent and the Surviving Entity shall be entitled to deduct and withhold from the consideration otherwise payable to any Person pursuant to Article I and Article II such amounts as it is required to deduct and withhold with respect to the making of such payment under the Code and the rules and regulations promulgated thereunder, or any provision of state, local or foreign Tax Law. To the extent that amounts are so deducted or withheld and paid over to the applicable Governmental Entity or Taxing Authority, such deducted or withheld amounts shall be treated for all purposes of this Agreement as having been paid to the holder of the shares of CBOT Holdings Class A Common Stock in respect of which such deduction and withholding was made.

Section 2.5 Further Assurances. After the Effective Time, the officers and directors of the Surviving Entity will be authorized to execute and deliver, in the name and on behalf of CBOT Holdings, any deeds, bills of sale, assignments or assurances and to take and do, in the name and on behalf of CBOT Holdings, any other actions and things to vest, perfect or confirm of record or otherwise in the Surviving Entity any and all right, title and interest in, to and under any of the rights, properties or assets acquired or to be acquired by the Surviving Entity as a result of, or in connection with, the Merger.

Section 2.6 Affiliates. Notwithstanding anything to the contrary herein, to the fullest extent permitted by Law, no certificates representing shares of CME Holdings Class A Common Stock or cash shall be delivered to a Person who may be deemed an ''affiliate'' of CBOT Holdings in accordance with Section 6.12 hereof for purposes of Rule 145 under the Securities Act, until such Person has executed and delivered an Affiliate Agreement to CME Holdings.

ARTICLE III

REPRESENTATIONS AND WARRANTIES OF CBOT HOLDINGS AND CBOT

Except as otherwise disclosed or identified in the CBOT Holdings SEC Documents filed prior to the date hereof (excluding any disclosures included in such CBOT Holdings SEC Documents that are predictive or forward-looking in nature) or in a letter (the ''CBOT Holdings Disclosure Letter'') delivered to CME Holdings by CBOT Holdings prior to the execution of this Agreement (with specific reference to the representations and warranties in this Article III to which the information in such letter relates; provided, that, disclosure in the CBOT Holdings Disclosure Letter as to a specific representation or warranty shall qualify any other sections of this Agreement to the extent (notwithstanding the absence of a specific cross reference) it is reasonably apparent that such disclosure relates to such other sections), CBOT Holdings and CBOT jointly and severally represent and warrant to CME Holdings as follows:

Section 3.01 Organization. CBOT Holdings is a corporation duly incorporated, validly existing and in good standing under the laws of the State of Delaware and has all requisite corporate power and authority to own, lease and operate its properties and assets and to carry on its business as now being conducted. CBOT Holdings has made available to CME Holdings true, correct and complete copies of its Constituent Documents, as amended and in effect on the date of this Agreement.

Section 3.02 Subsidiaries.

(a) Section 3.2(a) of the CBOT Holdings Disclosure Letter sets forth (i) each Subsidiary of CBOT Holdings (individually, a ''CBOT Holdings Subsidiary'' and collectively, the ''CBOT Holdings Subsidiaries''), (ii) each CBOT Holdings Subsidiarys jurisdiction of incorporation or organization and (iii) the location of each CBOT Holdings Subsidiarys principal executive offices. Each CBOT Holdings Subsidiary is a corporation duly incorporated or a limited liability company, partnership or other entity duly organized and is validly existing and in good standing under the laws of the jurisdiction of its incorporation or organization, as the case may be, and has all requisite corporate or other power and authority, as the case may be, to own, lease and operate its properties and assets and to carry on its business as now being conducted. CBOT Holdings has made available to CME Holdings true, correct and complete copies of the Constituent Documents of each CBOT Holdings Subsidiary, as amended and in effect on the date of this Agreement.

(b) Except for the Class B Memberships in CBOT, CBOT Holdings is, directly or indirectly, the record and beneficial owner of all of the outstanding Securities of each CBOT Holdings Subsidiary, free and clear of any Liens and free of any other limitation or restriction (including any limitation or restriction on the right to vote, sell, transfer or otherwise dispose of the Securities). All of such Securities so owned by CBOT Holdings have been duly authorized, validly issued, fully paid and nonassessable (and no such shares have been issued in violation of any preemptive or similar rights). Except for the Securities of the CBOT Holdings Subsidiaries, CBOT Holdings does not own, directly or indirectly, any capital stock or other ownership interest in any entity.

Section 3.3 Capitalization; Membership Interests.

(a) As of the date of this Agreement, the authorized capital stock of CBOT Holdings consists of (i) 200,000,000 shares of Class A Common Stock, par value $0.001 per share (the ''CBOT Holdings Class A Common Stock''), of which 16,457,138 shares have been designated as Series A-1 Class A Common Stock, 16,451,412 shares have been designated as Series A-2 Class A Common Stock and 16,451,412 shares have been designated as Series A-3 Class A Common Stock, (ii) one (1) share of Class B Common Stock, par value $0.001 per share (the ''CBOT Holdings Class B Common Stock'' and, together with the CBOT Holdings Class A Common Stock, the ''CBOT Holdings Common Stock'') and (iii) 20,000,000 shares of Preferred Stock, par value $0.001 per share (the ''CBOT Holdings Preferred Stock''), of which 2,000,000 shares have been designated as Series A Junior Participating Preferred Stock.

(b) At the close of business on October 13, 2006: (i) 52,839,473 shares of CBOT Holdings Class A Common Stock were issued and outstanding as follows: (1) no shares of Series A-1 Class A Common Stock were issued and outstanding, (2) 16,353,172 shares of Series A-2 Class A Common Stock were issued and outstanding and (3) 16,579,159 shares of Series A-3 Class A Common Stock were issued and outstanding; (ii) one (1) share of CBOT Holdings Class B Common Stock was issued and outstanding; (iii) no shares of CBOT Holdings Preferred Stock were issued and outstanding; and (iv) 1,200,000 shares of CBOT Holdings Class A Common Stock were reserved for issuance pursuant to the CBOT Holdings Stock Plans. Except as set forth above, as of October 13, 2006, no shares of capital stock of CBOT Holdings were issued, reserved for issuance or outstanding. All issued and outstanding shares of CBOT Holdings Common Stock and CBOT Holdings Preferred Stock have been, and all shares of CBOT Holdings Class A Common Stock that may be issued pursuant to the exercise of outstanding options will be, when issued in accordance with the terms thereof, duly authorized, validly issued, fully paid and nonassessable and are subject to no preemptive or similar rights.

(c) As of the date of this Agreement, the authorized membership in CBOT consists of (i) one (1) Class A Membership and (ii) 3,681 Class B Memberships (together with the Class A Membership, the ''Membership Interests''), which have been divided into five series as follows: (1) 1,402 Series B-1 Memberships, (2) 867 Series B-2 Memberships, (3) 128 Series B-3 Memberships, (4) 641 Series B-4 Memberships and (5) 643 Series B-5 Memberships.

(d) At the close of business on October 13, 2006: (i) one (1) Class A Membership was issued and outstanding; and (ii) 3,601 Class B Memberships were issued and outstanding as follows: (1) 1,402 Series B-1 Memberships were issued and outstanding, (2) 811 Series B-2 Memberships were issued and outstanding, (3) 104 Series B-3 Memberships were issued and outstanding, (4) 641 Series B-4 Memberships were issued and outstanding and (5) 643 Series B-5 Memberships were issued and outstanding. Except as set forth above, as of October 13, 2006, no Membership Interests were issued or outstanding. As of October 13, 2006, the sole Class A Membership was held by CBOT Holdings. All issued and outstanding Membership Interests in CBOT have been duly authorized, validly issued, fully paid and nonassessable and are subject to no preemptive or similar rights. Except as set forth in the Constituent Documents of CBOT Holdings and CBOT, neither CBOT Holdings nor any CBOT Holdings Subsidiary is a party to any agreements with, or have granted any rights for the benefit of or taken any similar action with respect to, any Members. The only corporate governance rights or entitlements of any Members with respect to CBOT Holdings or the CBOT Holdings Subsidiaries are those corporate governance rights and entitlements provided for in the Constituent Documents of CBOT Holdings and CBOT.

(e) CBOT Holdings has made available to CME Holdings a complete and correct copy of the CBOT Holdings Rights Agreement as in effect on the date hereof.

(f) Section 3.3(f) of the CBOT Holdings Disclosure Letter sets forth each CBOT Holdings Stock Plan and, as of October 13, 2006, the aggregate number of shares of CBOT Holdings Class A Common Stock relating to outstanding and available awards under each CBOT Holdings Stock Plan. CBOT Holdings has made available to CME Holdings the form of agreement related to each such award. No material changes have been made to such form in connection with any award.

(g) There are no preemptive or similar rights on the part of any holder of any class of Securities of CBOT Holdings or any CBOT Holdings Subsidiary. Neither CBOT Holdings nor any CBOT Holdings Subsidiary has outstanding any bonds, debentures, notes or other obligations the holders of which have the right to vote (or which are convertible into or exercisable for securities having the right to vote) with the holders of any class of Securities of CBOT Holdings or any CBOT Holdings Subsidiary on any matter submitted to such holders of Securities. As of the date of this Agreement, there are no options, warrants, calls, rights, convertible or exchangeable securities, ''phantom'' stock rights, stock appreciation rights, stock-based performance units, commitments, contracts, arrangements or undertakings of any kind to which CBOT Holdings or any CBOT Holdings Subsidiary is a party or by which any of them is bound (i) obligating CBOT Holdings or any CBOT Holdings Subsidiary to issue, deliver, sell or transfer or repurchase, redeem or otherwise acquire, or cause to be issued, delivered, sold or transferred or repurchased, redeemed or otherwise acquired, any Securities of CBOT Holdings or any CBOT Holdings Subsidiary, or any security convertible or exercisable for or exchangeable into any Securities of CBOT Holdings or any CBOT Holdings Subsidiary, (ii) obligating CBOT Holdings or any CBOT Holdings Subsidiary to issue, grant, extend or enter into any such option, warrant, call, right, security, commitment, contract, arrangement or undertaking or (iii) that give any Person the right to receive any economic benefit or right similar to or derived from the economic benefits and rights accruing to holders of Securities of CBOT Holdings or any CBOT Holdings Subsidiary. As of the date of this Agreement, there are no outstanding contractual obligations of CBOT Holdings or any CBOT Holdings Subsidiary to repurchase, redeem or otherwise acquire any Securities of CBOT Holdings or any CBOT Holdings Subsidiary. Except for the Voting Trust, there are no proxies, voting trusts or other agreements or understandings to which CBOT Holdings or any CBOT Holdings Subsidiary is a party or is bound with respect to the voting of the Securities of CBOT Holdings or CBOT.

Section 3.4 Authorization; Board Approval; Voting Requirements.

(a) Each of CBOT Holdings and CBOT has all requisite corporate power and authority to execute and deliver this Agreement, to perform its obligations hereunder and, subject to (i) with respect to CBOT Holdings, receipt of approval by the holders of a majority of the outstanding shares of CBOT Holdings Class A Common Stock entitled to vote in accordance with the DGCL and (ii) with respect to CBOT, receipt of the CBOT Membership Approval (collectively, the ''CBOT Holdings Stockholder Approval''), to consummate the Merger and the other transactions contemplated hereby. The execution, delivery and performance of this Agreement and the consummation of the Merger and the other transactions contemplated hereby have been duly and validly authorized by all necessary corporate actions, and no other corporate proceedings on the part of either CBOT Holdings or CBOT are necessary for it to authorize this Agreement or to consummate the transactions contemplated hereby, except for the adoption of this Agreement and the transactions contemplated hereby by the CBOT Holdings Stockholder Approval. This Agreement has been duly and validly executed and delivered by each of CBOT Holdings and CBOT and, assuming due authorization, execution and delivery by CME Holdings, is a legal, valid and binding obligation of each of CBOT Holdings and CBOT, enforceable against each of CBOT Holdings and CBOT in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors rights and to general equity principles.

(b) The Board of Directors of CBOT Holdings, at a meeting duly called and held, duly and unanimously adopted resolutions (i) determining that the terms of the Merger and the other transactions contemplated by this Agreement are advisable, fair to and in the best interests of CBOT Holdings and its stockholders, (ii) approving this Agreement, the Merger and the other transactions contemplated by this Agreement, (iii) recommending that CBOT Holdings stockholders adopt this Agreement and approve the transactions contemplated hereby and (iv) eliminating any transfer restrictions on all Series A-2 and Series A-3 shares of CBOT Holdings Class A Common Stock pursuant to the terms of the certificate of incorporation of CBOT Holdings in order to permit the holders of such shares to exchange such shares in the Merger.

(c) The Board of Directors of CBOT, at a meeting duly called and held, duly and unanimously adopted resolutions (i) approving this Agreement and the transactions contemplated by this Agreement, (ii) determining that the amendments to the certificate of incorporation of CBOT set forth in the Amended and Restated Certificate of Incorporation of CBOT in the form attached hereto as Exhibit C are advisable and (iii) recommending that the holders of the Series B-1 and Series B-2 Membership Interests vote to (1) approve the Repurchase, (2) adopt the Amended and Restated Certificate of Incorporation of CBOT in the form attached hereto as Exhibit C and (3) adopt the Amended and Restated By-Laws of CBOT in the form attached hereto as Exhibit D.

(d) Assuming the accuracy of the representations and warranties of CME Holdings set forth in Section 4.23, the affirmative vote of holders of a majority of the outstanding CBOT Holdings Class A Common Stock at the CBOT Holdings Stockholders Meeting or any adjournment or postponement thereof to adopt this Agreement is the only vote of the holders of any class or series of Securities of CBOT Holdings necessary to adopt this Agreement and approve the transactions contemplated hereby.

(e) The receipt of the CBOT Membership Approval at the CBOT Membership Meeting or any adjournment or postponement thereof is the only vote of the holders of any class or series of Securities of CBOT necessary to consummate the transactions contemplated hereby.

Section 3.5 Takeover Statute; No Restrictions on the Merger.

(a) No state ''fair price,'' ''moratorium,'' ''control share acquisition'' or similar anti-takeover statute is applicable to the Merger or the other transactions contemplated by this Agreement.

(b) Assuming the accuracy of the representations and warranties of CME Holdings set forth in Section 4.23, CBOT Holdings has taken all necessary action to render the restrictions on business combinations contained in Section 203 of the DGCL hereby inapplicable to this Agreement and the transactions contemplated hereby.

(c) CBOT Holdings has or caused to be taken all necessary action in order to make this Agreement and the transactions contemplated hereby comply with, and this Agreement and the transactions contemplated hereby do comply with, the requirements in the Constituent Documents of CBOT Holdings and the CBOT Holdings Subsidiaries concerning ''business combination,'' ''fair price,'' ''voting requirement'' or other related provisions.

Section 3.6 Rights Agreement. CBOT Holdings has taken all necessary action so that the execution of this Agreement and the consummation of the transactions contemplated hereby do not and will not result in the ability of any Person to exercise any rights under the CBOT Holdings Rights Agreement or enable or require the CBOT Holdings Rights to separate from the shares of CBOT Holdings Class A Common Stock to which they are attached or to be triggered or become exercisable or unredeemable. No Distribution Date, as defined in the CBOT Holdings Rights Agreement, has occurred or will occur as a result of the transactions contemplated hereby.

Section 3.7 Consents and Approvals; No Violations.

(a) The execution and delivery of this Agreement by each of CBOT Holdings and CBOT do not and the consummation by each of CBOT Holdings and CBOT of the transactions contemplated hereby will not: (i) conflict with any provisions of the Constituent Documents of CBOT Holdings or any CBOT Holdings Subsidiary, or conflict with any provisions of the Voting Trust; (ii) violate any Law or Order (assuming compliance with the matters set forth in Section 3.7(b)); (iii) result in any violation of or default or loss of a benefit under, or permit the acceleration or termination of any obligation under or require any consent under, any mortgage, indenture, lease, agreement or other instrument, permit, concession, grant, franchise or license; (iv) result in the creation or imposition of any Lien upon any properties or assets of CBOT Holdings or any CBOT Holdings Subsidiary; or (v) cause the suspension or revocation of any permit, license, governmental authorization, consent or approval necessary for CBOT Holdings or any CBOT Holdings Subsidiary to conduct its business as currently conducted, except, in the case of clauses (ii), (iii), (iv) and (v), as would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect on CBOT Holdings and as would not reasonably be expected to materially delay or impair the consummation of the Merger.

(b) No consent, approval, order or authorization of, or declaration, registration or filing with, or notice to any Governmental Entity or Self-Regulatory Organization is required to be made or obtained by CBOT Holdings or any CBOT Holdings Subsidiary in connection with the execution or delivery of this Agreement by CBOT Holdings and CBOT or the consummation by CBOT Holdings and CBOT of the transactions contemplated hereby, except for: (i) compliance by CBOT Holdings with the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the ''HSR Act''), any required filings or notifications under any foreign antitrust merger control laws (the ''Foreign Competition Laws''); (ii) the filing of the Certificate of Merger with the Secretary of State of the State of Delaware in accordance with the DGCL; (iii) the filings with the Securities and Exchange Commission (the ''SEC'') of (A) the Joint Proxy Statement/Prospectus in accordance with Regulation 14A promulgated under the Exchange Act, (B) the registration statement on Form S-4 promulgated under the Securities Act and (C) such reports under and such other compliance with the Exchange Act and the Securities Act as may be required in connection with this Agreement and the transactions contemplated hereby; (iv) such clearances, consents, approvals, orders, licenses, authorizations, registrations, declarations, permits, filings and notifications as may be required under applicable U.S. federal and state securities Laws; (v) the filings, notices, approvals and/or consents to be obtained from the CFTC and under the Commodity Exchange Act; and (vi) any consent, approval, order or authorization of, or declaration, registration or filing with, or notice to any Governmental Entity or Self-Regulatory Organization (other than any of the foregoing addressed in clauses (i) through (v) above), the failure to make or obtain would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect on CBOT Holdings.

Section 3.8 SEC Reports; CBOT Holdings Financial Statements.

(a) CBOT Holdings and each CBOT Holdings Subsidiary has filed or furnished all reports, schedules, forms, statements and other documents required to be filed or furnished by it with or to the SEC since February 14, 2005 (together with all exhibits, financial statements and schedules thereto and all information incorporated therein by reference, the ''CBOT Holdings SEC Documents''). As of its respective date, or, if amended, as of the date of the last such amendment, each of the CBOT Holdings SEC Documents complied when filed or furnished (or, if applicable, when amended) in all material respects with the requirements of the Exchange Act, the Securities Act and the Sarbanes-Oxley Act of 2002 and the related rules and regulations promulgated under such Act (the ''Sarbanes-Oxley Act'') applicable to such CBOT Holdings SEC Documents, and did not, and any CBOT Holdings SEC Documents filed with the SEC subsequent to the date hereof will not, contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or incorporated by reference therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. None of the CBOT Holdings Subsidiaries is required to make any filings with the SEC pursuant to Section 13 or 15(d) of the Exchange Act.

(b) The CBOT Holdings Financial Statements have been derived from the accounting books and records of CBOT Holdings and the CBOT Holdings Subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles (''GAAP'') applied on a consistent basis throughout the periods presented, except as otherwise noted therein. The consolidated balance sheets (including the related notes) included in the CBOT Holdings Financial Statements present fairly in all material respects the financial position of CBOT Holdings and the CBOT Holdings Subsidiaries as at the respective dates thereof, and the consolidated statements of income, consolidated statements of stockholders equity and consolidated statements of cash flows (in each case including the related notes) included in such CBOT Holdings Financial Statements present fairly in all material respects the results of operations, stockholders equity and cash flows of CBOT Holdings and the CBOT Holdings Subsidiaries for the respective periods indicated.

(c) There are no amendments or modifications, which are or, to the knowledge of CBOT Holdings, will be required to be filed with the SEC, but have not yet been filed with the SEC, to (i) agreements, documents or other instruments which previously have been filed by CBOT Holdings with the SEC pursuant to the Exchange Act or (ii) the CBOT Holdings SEC Documents. CBOT Holdings has timely responded to all comment letters of the staff of the SEC relating to the CBOT Holdings SEC Documents, and the SEC has not asserted that any of such responses are inadequate, insufficient or otherwise non-responsive. CBOT Holdings has made available to CME Holdings true, correct and complete copies of all material correspondence with the SEC occurring since January 1, 2004. None of the CBOT Holdings SEC Documents is, to the knowledge of CBOT Holdings, the subject of ongoing SEC review.

Section 3.9 Absence of Undisclosed Liabilities. CBOT Holdings and the CBOT Holdings Subsidiaries do not have any liabilities or obligations, whether or not accrued, known or unknown, contingent or otherwise and whether or not required to be disclosed or reflected on or reserved against in the consolidated balance sheet of CBOT Holdings and the CBOT Holdings Subsidiaries, except liabilities and obligations that would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect on CBOT Holdings.

Section 3.10 Form S-4; Joint Proxy Statement/Prospectus. None of the information supplied or to be supplied by CBOT Holdings or CBOT for inclusion or incorporation by reference in (i) the registration statement on Form S-4 to be filed with the SEC by CME Holdings in connection with the issuance of shares of CME Holdings Class A Common Stock in the Merger (the ''Form S-4'') will, at the time the Form S-4 is filed with the SEC or at any time it is supplemented or amended or at the time it becomes effective under the Securities Act, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they are made, not misleading or (ii) the Joint Proxy Statement/Prospectus will, on the date mailed to the stockholders of CBOT Holdings and CME Holdings and to the Members of CBOT and at the time of the CBOT Holdings Meetings and the CME Holdings Stockholders Meeting, contain any untrue statement of a fact or omit to state any fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they are made, not misleading.

Section 3.11 Absence of Certain Changes. Since January 1, 2006, (i) CBOT Holdings and the CBOT Holdings Subsidiaries have conducted their respective businesses only in the ordinary course consistent with past practice; (ii) except as required by GAAP, there has not been any change by CBOT Holdings in its accounting principles, practices or methods and (iii) there has not been any change by CBOT Holdings in its system of internal accounting controls. Since January 1, 2006, there have not been any changes, circumstances or events that, individually or in the aggregate, have resulted in or would reasonably be expected to result in a Material Adverse Effect on CBOT Holdings.

Section 3.12 Litigation. There is no material suit, action, proceeding, claim, review or investigation (whether at law or in equity, before or by any Governmental Entity, Self-Regulatory Organization or before any arbitrator) pending, affecting, or to the knowledge of CBOT Holdings, threatened within the three-year period prior to the date of this Agreement against CBOT Holdings or any CBOT Holdings Subsidiary, or their respective properties or rights. There is no material Order of any Governmental Entity, Self-Regulatory Organization or arbitrator outstanding against CBOT Holdings or any CBOT Holdings Subsidiary. There is no suit, claim, action, proceeding, arbitration or investigation pending or, to the knowledge of CBOT Holdings, threatened against CBOT Holdings or any CBOT Holdings Subsidiary, which seeks to, or could reasonably be expected to, restrain, enjoin or delay the consummation of the Merger or any of the other transactions contemplated hereby or which seeks damages in connection therewith, and no injunction of any type has been entered or issued.

Section 3.13 Compliance with Laws.

(a) Each of CBOT Holdings and the CBOT Holdings Subsidiaries hold all material permits, licenses, variances, exemptions, Orders and approvals of all Governmental Entities and Self-Regulatory Organizations necessary for the lawful conduct of their respective businesses or ownership of their respective assets and properties (the ''CBOT Holdings Permits''). Each of CBOT Holdings and the CBOT Holdings Subsidiaries is, and since January 1, 2004, has been in compliance in all material respects with the terms of the CBOT Holdings Permits. The businesses of CBOT Holdings and each of the CBOT Holdings Subsidiaries are, and since January 1, 2004, have been conducted in compliance in all material respects with all Laws and the applicable rules of any Self-Regulatory Organization. Each of CBOT Holdings and the CBOT Holdings Subsidiaries is in compliance with its Constituent Documents and, as applicable, the Voting Trust. Except as, individually or in the aggregate, would not reasonably be expected to result in a Material Adverse Effect on CBOT Holdings, (x) no material change is required in CBOT Holdings or any CBOT Holdings Subsidiarys processes, properties or procedures to comply with any Laws in effect on the date hereof or enacted as of the date hereof and scheduled to be effective after the date hereof and (y) CBOT Holdings has not received any written notice or written communication of any noncompliance with any Laws and no Governmental Entity or Self-Regulatory Organization has otherwise identified any instance in which CBOT Holdings or any CBOT Holdings Subsidiary is or may be in violation of applicable Laws.

(b) Each of the principal executive officer of CBOT Holdings and the principal financial officer of CBOT Holdings (or each former principal executive officer of CBOT Holdings and each former principal financial officer of CBOT Holdings, as applicable) has made all certifications required by Rule 13a-14 or 15d-14 under the Exchange Act and Sections 302 and 906 of the Sarbanes-Oxley Act with respect to the CBOT Holdings SEC Documents, and the statements contained in such certifications are true and accurate. For purposes of the preceding sentence, ''principal executive officer'' and ''principal financial officer'' shall have the meanings given to such terms in the Sarbanes-Oxley Act. Except as permitted by the Exchange Act, including Sections 13(k)(2) and (3), since the enactment of the Sarbanes-Oxley Act, neither CBOT Holdings nor any of its Affiliates has directly or indirectly extended or maintained credit, arranged for the extension of credit, renewed an extension of credit or materially modified an extension of credit in the form of personal loans to any executive officer or director (or equivalent thereof) of CBOT Holdings or any CBOT Holdings Subsidiary.

(c) CBOT Holdings maintains a system of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with managements general or specific authorizations, (ii) access to assets is permitted only in accordance with managements general or specific authorization and (iii) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(d) CBOT Holdings ''disclosure controls and procedures'' (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) are reasonably designed to ensure that information required to be disclosed by CBOT Holdings in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time period specified in the rules and forms of the SEC, and that all such information is accumulated and communicated to CBOT Holdings management as appropriate to allow timely decisions regarding required disclosure and to make the certifications of the chief executive officer and chief financial officer of CBOT Holdings required under the Exchange Act with respect to such reports.

(e) CBOT Holdings has made available to CME Holdings copies of any written notifications it has received to date since January 1, 2004 of a (i) ''significant deficiency'' or (ii) ''material weakness'' in CBOT Holdings internal controls. For purposes of this Agreement, the terms ''significant deficiency'' and ''material weakness'' shall have the meanings assigned to them in the Statements of Auditing Standards No. 60, as in effect on the date hereof.

(f) CBOT has been designated by the CFTC as a ''contract market'' and is registered with the CFTC as a ''derivatives clearing organization'' under the Commodity Exchange Act. Other than CBOT, neither CBOT Holdings nor any CBOT Holdings Subsidiary is required to apply to the CFTC for designation as a contract market or to be registered with the CFTC as a derivatives clearing organization.

Section 3.14 Taxes.

(a) CBOT Holdings and each CBOT Holdings Subsidiary have (i) duly and timely filed (or there have been duly and timely filed on its behalf) with the appropriate Governmental Entities or Taxing Authorities all Tax Returns required to be filed by it in respect of any material Taxes, which Tax Returns were true, correct and complete in all material respects, (ii) duly and timely paid in full (or CBOT Holdings has paid on the CBOT Holdings Subsidiaries behalf) all Taxes shown as due on such Tax Returns, (iii) duly and timely paid in full or withheld, or established adequate reserves in accordance with GAAP for, all material Taxes that are due and payable by it, (iv) established reserves in accordance with GAAP that are adequate for the payment of all material Taxes not yet due and payable with respect to the results of operations of CBOT Holdings and each CBOT Holdings Subsidiary through the date of this Agreement and (v) complied in all material respects with all laws applicable to the withholding and payment over of Taxes and has timely withheld and paid over to, or, where amounts have not been so withheld, established an adequate reserve under GAAP for the payment to, the respective proper Governmental Entities or Taxing Authorities all material amounts required to be so withheld and paid over.

(b) There (i) is no deficiency, claim, audit, suit, proceeding, request for information or investigation now pending, outstanding or, to the knowledge of CBOT Holdings, threatened against or with respect to CBOT Holdings or any CBOT Holdings Subsidiary in respect of any material Taxes or material Tax Returns and (ii) are no requests for rulings or determinations in respect of any material Taxes or material Tax Returns pending between CBOT Holdings or any CBOT Holdings Subsidiary and any authority responsible for such Taxes or Tax Returns.

(c) No material deficiency for any Tax has been asserted or assessed by any Governmental Entity or Taxing Authority in writing against CBOT Holdings or any CBOT Holdings Subsidiary (or, to the knowledge of CBOT Holdings or any CBOT Holdings Subsidiary, has been threatened or proposed), except for deficiencies which have been satisfied by payment, settled or been withdrawn or which are being diligently contested in good faith by appropriate proceedings and for which adequate reserves have been established in accordance with GAAP.

(d) There are no tax sharing agreements, tax indemnity agreements or other similar agreements with respect to or involving CBOT Holdings or any CBOT Holdings Subsidiary.

(e) None of CBOT Holdings or any CBOT Holdings Subsidiary has any liability for material Taxes as a result of having been a member of any affiliated group within the meaning of Section 1504(a) of the Code, or any similar affiliated or consolidated group for tax purposes under state, local or foreign law (other than a group the common parent of which is CBOT Holdings), or has any liability for the Taxes of any Person (other than CBOT Holdings or the CBOT Holdings Subsidiaries) under Treasury Regulations Section 1.1502-6 (or any similar provision of state, local or foreign law), or as a transferee or successor, by contract or otherwise.

(f) There are no material adjustments under Section 481 of the Code (or similar or analogous provision of state, local or foreign law) for income tax purposes applicable to or required to be made by CBOT Holdings or any CBOT Holdings Subsidiary as a result of changes in methods of accounting or other events occurring on or before the date hereof.

(g) None of CBOT Holdings or any CBOT Holdings Subsidiary will be required to include any item of income in, or exclude any item of deduction from, taxable income for any taxable period (or portion thereof) ending after the Closing Date as a result of any (i) change in method of accounting for a taxable period ending on or prior to the Closing Date, (ii) ''closing agreement'' as described in Section 7121 of the Code (or any corresponding or similar provision of state, local or foreign Tax law) executed on or prior to the Closing Date, (iii) intercompany transactions or excess loss account described in Treasury Regulations under Section 1502 of the Code (or any corresponding or similar provision of state, local or foreign Tax law), (iv) installment sale or open transaction disposition made on or prior to the Closing Date, (v) prepaid amount received on or prior to the Closing Date or (vi) otherwise as a result of a transaction or accounting method that accelerated an item of deduction into periods ending on or before the Closing Date or a transaction or accounting method that deferred an item of income into periods beginning after the Closing Date except, in the case of each of the foregoing clauses (i) - (v), for amounts reflected in a reserve for Taxes reflected in the CBOT Holdings Financial Statements.

(h) There are no Liens for Taxes upon any property or assets of CBOT Holdings or any CBOT Holdings Subsidiary, except for Permitted Liens.

(i) Neither CBOT Holdings nor any CBOT Holdings Subsidiary has participated in a ''listed transaction'' within the meaning of Treasury Regulations Section 1.6011-4(b)(2).

(j) No claim, other than claims defeated or withdrawn, has ever been made by an authority in a jurisdiction where CBOT Holdings or any CBOT Holdings Subsidiary has not filed Tax Returns that it is or may be subject to taxation by that jurisdiction.

(k) Neither CBOT Holdings nor any CBOT Holdings Subsidiary has waived any statute of limitations in respect of Taxes or agreed to any extension of time with regard to a Tax assessment or deficiency (other than pursuant to extensions of time to file Tax Returns obtained in the ordinary course).

(l) None of CBOT Holdings or any CBOT Holdings Subsidiary has been a ''controlled corporation'' or a ''distributing corporation'' in any distribution occurring during the two-year period ending on the date hereof that was purported or intended to be governed by Section 355 of the Code (or any similar provision of state, local or foreign Law).

(m) CBOT Holdings is not, and has not been at any time within the last five years, a ''United States real property holding corporation'' within the meaning of Section 897(c)(2) of the Code.

(n) There is no power of attorney given by or binding upon CBOT Holdings or any CBOT Holdings Subsidiary with respect to Taxes for any period for which the statute of limitations (including any waivers or extensions) has not yet expired.

(o) CBOT Holdings and each CBOT Holdings Subsidiary have made (or there has been made on their behalf) all required current estimated Tax payments sufficient to avoid any underpayment penalties.

(p) None of the indebtedness of CBOT Holdings or any CBOT Holdings Subsidiary constitutes (i) ''corporate acquisition indebtedness'' (as defined in

Section 279(b) of the Code) with respect to which any interest deductions may be disallowed under Section 279 of the Code or (ii) an ''applicable high yield discount obligation'' under Section 163(i) of the Code.

(q) None of CBOT Holdings or any CBOT Holdings Subsidiary has taken or failed to take any action, or has knowledge of any facts or circumstances, that would prevent the Merger from constituting a tax-free reorganization described in Section 368(a) and related provisions of the Code.

(r) None of CBOT Holdings or any CBOT Holdings Subsidiary has taken or failed to take any action, or has knowledge of any facts or circumstances, that would invalidate the rulings received from the IRS in connection with CBOT Holdings demutualization transactions.

Section 3.15 Real Property. The CBOT Holdings Owned Real Property and the CBOT Holdings Leased Real Property described in Section 3.15 of the CBOT Holdings Disclosure Letter (collectively, the ''CBOT Holdings Real Property'') constitute all the fee and leasehold interests in real property of CBOT Holdings and the CBOT Holdings Subsidiaries.

(a) With respect to the CBOT Holdings Real Property:

(i) no portion of any CBOT Holdings Owned Real Property has suffered any damage by fire or other casualty loss which has not heretofore been completely repaired and restored, except as would not, individually or in the aggregate, reasonably be expected to materially and adversely interfere with the use of the CBOT Holdings Owned Real Property;

(ii) CBOT Holdings has made available to CME Holdings complete and accurate copies of all of the following materials relating to any CBOT Holdings Real Property, to the extent in CBOT Holdings or any CBOT Holdings Subsidiarys possession or control: all Leases of CBOT Holdings Leased Real Property (including any amendments, modifications or supplements thereto); all CBOT Holdings Material Leases (including any amendments, modifications or supplements thereto), and with respect to the CBOT Holdings Owned Real Property, the current rent roll, receivables report, and, to the knowledge of CBOT Holdings, the most recent title insurance policy for the East Building and the most recent Tax appraisals; and

(iii) all of the materials with respect to the CBOT Holdings Real Property that have been made available to CME Holdings, other than those specifically described in Section 3.15(a)(ii) above, are not, to CBOT Holdings knowledge, misleading in any material respect.

(b) With respect to the CBOT Holdings Owned Real Property:

(i) CBOT Holdings or the applicable CBOT Holdings Subsidiary has good and marketable title to such CBOT Holdings Owned Real Property, free and clear of all Liens other than Permitted Liens and those Liens set forth in Section 3.15(b)(i) of the CBOT Holdings Disclosure Letter;

(ii) Other than with respect to matters being addressed with the Vaulted Sidewalk and Bollard Project affecting the North Building and with respect to one of the five back-up chillers which is not in working order, all buildings, structures, fixtures and improvements included within the CBOT Holdings Owned Real Property (the ''CBOT Holdings Improvements'') are in good repair and operating condition in all material respects, subject only to ordinary wear and tear, and are adequate and suitable in all material respects for the purposes for which they are presently being used or held for use, and to the knowledge of CBOT Holdings, there are no facts or conditions affecting any of the CBOT Holdings Improvements that, in the aggregate, would reasonably be expected to materially and adversely interfere with the current use, occupancy or operation thereof;

(iii) the existing buildings and improvements located on such CBOT Holdings Owned Real Property are located, to the knowledge of CBOT Holdings, entirely within the boundary lines of such CBOT Holdings Owned Real Property or on permanent easements on adjoining land benefiting such CBOT Holdings Owned Real Property and may lawfully be used under applicable zoning and land use laws (either as of right, by special permit or variance, or as a grandfathered use) for their material current uses;

(iv) there are no outstanding purchase agreements, options or rights of first refusal to purchase such CBOT Holdings Owned Real Property, or any material portion thereof or any material interest therein;

(v) other than the Parking Agreement listed on Section 3.15(b)(i) of the CBOT Holdings Disclosure Letter, Section 3.15(b)(v) of the CBOT Holdings Disclosure Letter sets forth all Leases, written or oral, granting to any party (other than CBOT Holdings or any CBOT Holdings Subsidiary) the right of use or occupancy of more than 10,000 square feet of any CBOT Holdings Owned Real Property, whether by one Lease or by more than one Lease to the same party (each, a ''CBOT Holdings Material Lease'' and collectively, the ''CBOT Holdings Material Leases''), and each CBOT Holdings Lease is the legal, valid, binding, and enforceable obligation of CBOT Holdings or the applicable CBOT Holdings Subsidiary that is lessor thereunder, and, with respect to each CBOT Holdings Material Lease:

(1) to the knowledge of CBOT Holdings, each such CBOT Holdings Material Lease is in full force