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Chicago Mercantile Exchange Holdings Inc. Announces Date Of Second Quarter Earnings Announcement, Conference Call

Date 10/07/2003

Chicago Mercantile Exchange Holdings Inc. (NYSE: CME) will announce earnings for the second quarter of 2003 before the financial markets open on Tuesday, July 22, 2003. The company has scheduled an investor conference call that day at 8:30 a.m. Eastern time (7:30 a.m. Central time).

A live audio Webcast of the conference call will be available on the Investor Relations section of the company's Web site. Following the conference call, an archived recording will be available at the same site. Those wishing to listen to the live conference via telephone should dial (800) 500-0177 if calling from within the United States or (719) 457-2679 if calling from outside the United States at least 10 minutes before the call begins.

In addition, the Webcast call will be distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.companyboardroom.com or by visiting any of the investor sites in CCBN's Individual Investor Network. Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

Chicago Mercantile Exchange Holdings Inc. is the parent company of Chicago Mercantile Exchange Inc. (www.cme.com), the largest futures exchange in the United States based on notional value, trading volume and open interest. On Dec. 6, 2002, CME became the first publicly traded U.S. financial exchange. As an international marketplace, CME brings together buyers and sellers on its trading floors and GLOBEX around-the-clock electronic trading platform. CME offers futures contracts and options on futures primarily in four product areas: interest rates, stock indexes, foreign exchange and commodities. The exchange moved about $1.5 billion per day in settlement payments in the first half of 2003 and managed $29.1 billion in collateral deposits at June 30, 2003.