TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	September 20, 2007
SUBJECT:	Chicago Climate Exchange Margin Rate European Carbon Financial Instrument Futures (ECFI)

The following margin intervals are effective with the launch of European Carbon Financial Instrument Futures (ECFI).

CCFE Contract: ECFI	Margin
Present up to December 2008 (non-inclusive)	$185
Present up to December 2008 (non-inclusive) – Spot Month	$275
December 2008 through December 2012	$2250
December 2008 through December 2012 – Spot Month	$3375

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

John Compall		john.compall@clearingcorp.com
Richard Crilly	312-786-3842	richard.crilly@clearingcorp.com
Marc MacQuarrie	312-786-5732	marc.macquarrie@clearingcorp.com
Client Services and Support Group	312-786-5718	css@clearingcorp.com
Clearing Corporation Web Site		http://www.clearingcorp.com