TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	September 11, 2007
SUBJECT:	USFE International Securities Exchange (ISE) Index Future Contracts Margin Rates

The following margin intervals are effective with the launch of the International Securities Exchange (ISE) Index Future contracts on the US Futures Exchange.

Contract	CCorp Commodity Code	Margin
ISE Homebuilders Index Future	UB	$275
ISE Natural Gas Index Future	UG	$550
ISE SINndex Future	UI	$400
ISE Water Index Future	UW	$350

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