CME Eurodollars on GLOBEX® Volume Hits New Record of Nearly 1.2 Million

CHICAGO, June 16 /PRNewswire-FirstCall/ -- Chicago Mercantile Exchange Inc. (CME), the largest U.S. futures exchange, announced today that its Eurodollars on GLOBEX^® volume totaled 1,193,132 contracts on June 15, setting a new single-day volume record for the trading of CME's benchmark short-term interest rate futures contract on CME's electronic trading platform. The previous record was 1.1 million set on May 7.

Yesterday's GLOBEX Eurodollar volume represented 52 percent of CME's total Eurodollar volume of 2,302,427, marking the second time in recent weeks that the percentage of electronically traded Eurodollars exceeded 50 percent of total contract volume during a single trading session.

For the month of June, Eurodollars on GLOBEX volume has averaged 649,135 contracts per day, an increase of over 500 percent since January.

CME's total volume on Tuesday of 5,206,959 was the fifth busiest, non- TRAKRS^™ launch date in the exchange's 106-year history and the fifth time this year that volume exceeded 5 million contracts, excluding launches of non- traditional TRAKRS contracts.

Chicago Mercantile Exchange Inc. ( http://www.cme.com ) is the largest futures exchange in the United States. As an international marketplace, CME brings together buyers and sellers on its trading floors and 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 quarter of 2004 and managed $38.1 billion in collateral deposits at March 31, 2004. CME is a wholly owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE: CME), which is part of the Russell 1000^® Index.

Chicago Mercantile Exchange, CME, the globe logo and GLOBEX are registered trademarks of Chicago Mercantile Exchange Inc. 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. Further information about CME and its products is available on the CME Web site at http://www.cme.com .

SOURCE Chicago Mercantile Exchange Inc.

CONTACT: Media, Anita S. Liskey, +1-312-466-4613, or John Holden, +1-312-930-3446, news@cme.com , or Investors, John Peschier, +1-312-930-8491, all for Chicago Mercantile Exchange Inc. Web site: http://www.cme.com

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding Chicago Mercantile Exchange's business which are not historical facts are "forward-looking statements" that involve risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's Annual Report or Form 10-K for the most recently ended fiscal year.