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Chicago Mercantile Exchange Announces Performance Upgrades To GLOBEX® And Modifies Schedule For Butterfly Spread Functionality To Accommodate Eurodollar Growth

Date 27/04/2004

Chicago Mercantile Exchange Inc. (CME) today announced that performance upgrades to advance GLOBEX® response times and throughput originally scheduled for later in 2004 will be accelerated and implemented on Sunday, June 27 (trade date June 28). These enhancements are driven by continued growth of Eurodollars on GLOBEX, up more than 360 percent in the first quarter of 2004 versus the same period last year.

A total of 811,443 Eurodollar futures contracts were traded April 21, 2004, on GLOBEX surpassing by 32 percent the previous record of 615,932 set on April 5, 2004. In April, CME is averaging nearly 390,000 Eurodollar futures on GLOBEX per day, representing nearly 30 percent of the total Eurodollar futures volume at CME month-to-date.

In addition to the performance upgrades that will be implemented, CME will also roll out other electronic interest rate trading initiatives, including FRA Switches and enhanced Eurodollar Options on GLOBEX. The release of implied butterfly spread functionality for Eurodollars on GLOBEX, previously scheduled for Sunday, May 16, 2004 (trade date May 17), is now scheduled for Sunday, September 5, 2004 (trade date September 6) to allow for the above upgrade and to provide sufficient time for CME and customer testing and deployment.

Chicago Mercantile Exchange Holdings Inc. became the first publicly traded U.S. financial exchange on Dec. 6, 2002. The company was added to the Russell 1000® Index on July 1, 2003. It is the parent company of Chicago Mercantile Exchange Inc. (www.cme.com), 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 $38.6 billion in collateral deposits at March 31, 2004.

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 its Web site at www.sec.gov. CME undertakes 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.