TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	July 12, 2007
SUBJECT:	Chicago Climate Exchange Margin Rate ECO Index

The following margin intervals are effective with the launch of ECO-Clean Energy Index Futures on the Chicago Climate Futures Exchange.

Contract	CCorp Commodity Code	Margin
ECO-Clean Energy Index	WE	$400

Should you have any questions, please call or e-mail one of the following Client Services and Support Representatives: