CME Index Futures Spread Ratio Change Effective 3/27/07

Performance Bond (Margin) Advisory Notices

To	Clearing Member Firms, Chief Financial Officers, Back Office Managers & Margin Managers
From	Clearing House Department
Subject	CME Index Futures Spread Ratio Change Effective 3/27/07
Notice Date	2007-03-26
Notice Number	07-80
Effective Date	2007-03-27
Chicago Mercantile Exchange Inc., Performance Bond staff approved the performance bond requirements for the CME Index Futures product listed on the attached advisory. This Spread Ratio Change will become effective on Tuesday, March 27, 2007. For the full text of this advisory . . .