Effective Sunday, May 13, 2001, the 2.5% Circuit Breaker for all Stock Index Futures contracts will be eliminated. This affects the S&P 500, E-Mini S&P 500, Nasdaq 100, E-Mini Nasdaq 100, S&P MidCap 400, Russell 2000, S&P/BARRA Growth, S&P/BARRA Value and FORTUNE E-50 Stock Index futures contracts.

The entire text of the pertinent rule changes can be found at http://www.members.cme.com, during the week beginning Monday, May 7, 2001. Please note that these details are only posted for one week following Board of Directors� approval.

If you have any questions regarding this change, please direct your calls to Mr. John Labuszewski, Product Development, at (312) 466-7469. Thank you.