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CME Foreign Exchange Futures Set New Overall Electronic Trading Volume Record As $30 Billion In Contracts Trade - Euro Futures Also Establish New Trading Volume Record

Date 28/10/2004

CME, the largest U.S. futures exchange and the largest regulated foreign exchange marketplace, announced that on Wednesday, October 27 the exchange set a new trading volume record of 226,405 contracts in its electronic foreign exchange (eFX) market on CME Globex®. Wednesday’s volume was up four percent from the previous eFX volume record of 217,683 set on September 10, 2004, and represented $30 billion in notional value.

CME’s Euro currency volume on CME Globex also established a new record with 126,479 contracts traded, surpassing the previous record of 110,605 contracts traded on June 9, 2004, and represented €16 billion ($20 billion) in notional value.

Through the end of September, trading in CME’s eFX market has more than doubled from last year and is up 118 percent. CME’s FX futures market provides users with liquid, transparent markets, guaranteed execution and central counterparty clearing risk management on 36 individual FX futures and 21 options on futures products. In 2003, more than 34 million FX contracts with a notional value of $3.7 trillion were traded at CME.

Chicago Mercantile Exchange Inc. (www.cme.com) is the largest futures exchange in theUnited States. As an international marketplace, CME brings together buyers and sellers on its trading floors and CME Globex electronic trading platform. 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 the first nine months of 2004 and managed $39.8 billion in collateral deposits as of September 30, 2004. 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 Annual Report on Form 10-K, which can be obtained at its Web site atwww.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 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.