News Release

CME Adds Electronic Trading Functionality for Dairy Class III Milk Futures Packs

Tue Sep 12 2006

CHICAGO, Sept. 12 /PRNewswire-FirstCall/ -- CME, the world's largest and most diverse financial exchange, announced that beginning Sept. 25, packs functionality will be available for Dairy Class III Milk Futures traded on CME Globex®, the exchange's world-class electronic trading platform. This new capability will enable market users to hedge their dairy positions for longer durations than a month at a time with a single trade execution.

The new milk futures strips spreads, or packs, will simplify order execution and allow users to enter a single transaction to cover as little as three months and going out to 12 months. The electronically traded contracts enable users to obtain a single quote for the entire price of a pack based on the previous day's settlement price. Every bid and offer will be totally transparent on CME Globex.

CME Dairy Class III Milk Futures, which are milk products used predominately in the manufacturing of cheddar cheese, began trading on CME Globex in February. For more information, please go to .

CME ( ) is the world's largest and most diverse financial exchange. As an international marketplace, CME brings together buyers and sellers on the CME Globex® electronic trading platform and on its trading floors. CME offers futures and options on futures in these product areas: interest rates, stock indexes, foreign exchange, agricultural commodities, energy, and alternative investment products such as weather, real estate and economic derivatives. CME is a wholly-owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE: CME)(NASDAQ: CME), which is part of the Russell 1000® Index and the S&P 500® 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 . We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

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