New Weather Margins Effective 8/6/07

Performance Bond (Margin) Advisory Notices

To	Clearing Member Firms, Chief Financial Officers, Back Office Managers & Margin Managers
From	Clearing House Department
Subject	New Weather Margins Effective 8/6/07
Notice Date	2007-08-05
Notice Number	07-182
Effective Date	2007-08-06
Chicago Mercantile Exchange Inc., Performance Bond staff approved the performance bond requirements for the following products listed on the attached advisory. These margins will become effective with the launch of these products on Monday, August 6, 2007. For the full text of this advisory . . .