The following is a letter from CME Chairman Terry Duffy and President and CEO Jim McNulty regarding the launch of single stock futures on OneChicago:

September 24, 2002

To All Shareholders, Members and Staff:

OneChicago, our joint venture with the Chicago Board Options Exchange and the Chicago Board of Trade to trade single stock futures, has just announced its plans to launch trading on Friday, October 25. Also included in the attached news release are details about the fee schedule for trading OneChicago products.

We look forward to sharing more information with you in the coming weeks. Additional information can be found on the Web site, www.onechicago.com.

Terry Duffy           Jim McNulty

Chairman            President and Chief Executive Officer

The full text of the news release can be accessed at the following link:

http://www.onechicago.com/060000_press_news/press_news_2002/09242002.html