CBT Performance Bonds Effective 3/14/06 & 3/20/06 Respectively

Performance Bond (Margin) Advisory Notices

To	Clearing Member Firms, Chief Financial Officers, Back Office Managers & Margin Managers
From	Clearing House Department
Subject	CBT Performance Bonds Effective 3/14/06 & 3/20/06 Respectively
Notice Date	2006-03-13
Notice Number	06-54
Effective Date	2006-03-14
Chicago Mercantile Exchange Inc. and Chicago Board of Trade Performance Bond staff approved the performance bond requirements for the following products listed on the attached advisory. These margins will become effective at the close of business on Tuesday, March 14, 2006. Performance bond requirements for the newly listed $25 BIG Dow Index will become effective with the launch of this product on Monday, March 20, 2006. For the full text of this advisory . . .