News Release

Chicago Mercantile Exchange Holdings Inc. Responds to CBOT Decision to Postpone Special Shareholder Meeting

Tue Mar 20 2007

CHICAGO, March 20 /PRNewswire-FirstCall/ -- Chicago Mercantile Exchange Holdings Inc. (NYSE: CME)(NASDAQ: CME) issued the following statement in response to the Chicago Board of Trade Holdings Inc. announcement that it intends to postpone its special shareholder meeting, previously scheduled for April 4, 2007, in order to provide sufficient time to review the unsolicited proposal submitted by the IntercontinentalExchange Inc. (ICE).

"We fully expect the CBOT's Board, after completing its review, will recognize that the CME/CBOT merger is superior to ICE's unsolicited proposal -- financially, strategically, and operationally. We look forward to completing our merger by mid-year."

As previously announced, CME will host a meeting with CBOT shareholders and members on Thursday, March 22, to discuss the advantages of the CME merger agreement over the ICE unsolicited proposal.

About CME

CME ( http://www.cme.com/ ) is the world's largest and most diverse financial exchange. As an international marketplace, CME brings together buyers and sellers on the CME Globex® electronic trading platform and on its trading floors. CME offers futures and options on futures in these product areas: interest rates, stock indexes, foreign exchange, agricultural commodities, energy, and alternative investment products such as weather, real estate and economic derivatives. CME is a wholly-owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE: CME)(NASDAQ: CME), which is part of the Russell 1000® Index and the S&P 500® Index.

Important Merger Information

CME and CBOT have filed a definitive prospectus/joint proxy statement with the Securities and Exchange Commission (SEC) in connection with the proposed transaction. This material is not a substitute for the definitive prospectus/proxy statement or any other documents CME and CBOT have filed or will file with the SEC. Investors and security holders are urged to read the definitive prospectus/proxy statement and any other relevant documents filed or to be filed by CME or CBOT because they contain or will contain important information about the proposed transaction. The definitive prospectus/proxy statement is, and other documents filed or to be filed by CME and CBOT with the SEC are or will be, available free of charge at the SEC's Web site ( http://www.sec.gov/ ) or from Chicago Mercantile Exchange Holdings Inc., Shareholder Relations and Membership Services, 20 South Wacker Drive, Chicago, Illinois 60606, Attention: Beth Hausoul.

CME-G

SOURCE: CME

CONTACT: Media Contacts, Anita Liskey, +1-312-466-4613, or Mary
Haffenberg, +1-312-930-3435, news@cme.com , or Investor Contact, John
Peschier, +1-312-930-8491, all of CME

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