TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	September 20, 2007
SUBJECT:	Chicago Climate Exchange Margin Rate for the (IFEX) Industry Loss Warranty Binary Futures U.S. Wind by Claim Event

SPAN^® Margining will be the method used by CCorp to margin the Chicago Climate Exchange’s Industry Loss Warranty Futures Binary U.S. Wind by Claim (IFEX) Event contract. The margin method will be predicated on margining the maximum potential loss through the use of SPAN arrays, which will cover the maximum potential loss of a contract. For example, if the binary contract settles at 60.00 then the result is CCorp collecting margin of $6,000.00 from longs and $4,000.00 from shorts. These products are fully margined to cover the respective maximum potential loss.

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

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