News Release

CME Achieves New Exchange-Wide Open Interest Record

Fri Feb 18 2005

CHICAGO, Feb. 18, 2005 - CME, the largest U.S. futures exchange, set a new open interest record yesterday of 29,078,892 positions, excluding Total Return Asset ContractsSM (TRAKRS). The previous record of 28,628,529 positions was set on Wednesday, February 16. Open interest in CME’s interest rate products was a record 24,201,101 and accounted for much of the activity. Individual open interest product records were also set for the following: CME Eurodollar futures contracts -8,066,788 positions CME Eurodollar options -- 16,134,313 positions E-mini™ S&P 500® options- 138,505 positions CME Cincinnati heating futures contracts - 1,125 positions Open interest reflects the total number of contracts that have not yet been offset or fulfilled for delivery. Chicago Mercantile Exchange Inc. (www.cme.com) is the largest futures exchange in the United States. As an international marketplace, CME brings together buyers and sellers on CME Globex® electronic trading platform and on its trading floor. CME offers futures 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 2004 and managed $44.1 billion in collateral deposits as of Dec. 31, 2004, including $3.1 billion in deposits for non-CME products. CME is a wholly owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE: CME), which is part of the Russell 1000® Index. Statements in this news release that are not historical facts are forward-looking statements. These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or implied in any forward-looking statements. More detailed information about factors that may affect our performance may be found in our filings with the Securities and Exchange Commission, including our most recent quarterly report on Form 10-Q, which can be obtained at its Web site at www.sec.gov. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise. Chicago Mercantile Exchange, CME, the globe logo and CME Globex are registered trademarks of Chicago Mercantile Exchange Inc. E-mini is a trademark of CME. CLEARING 21 is a registered trademark of CME and New York Mercantile Exchange, Inc. S&P, S&P 500, NASDAQ-100, Nikkei 225, Russell 1000, Russell 2000, TRAKRS, Total Return Asset Contracts and other trade names, service marks, trademarks and registered trademarks that are not proprietary to Chicago Mercantile Exchange Inc. are the property of their respective owners, and are used herein under license.

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