TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	August 23, 2007
SUBJECT:	USFE NORDIX Financial Wind Index Margin Rates

The following margin intervals are effective with the launch of the NORDIX Financial Wind Index Contracts on the US Futures Exchange.

NORDIX Wind Contract	New York Region 1	New York Region 2	Texas Region 1	Texas Region 2	Texas Region 3	Texas Region 4	Texas Region 5
Sep-2007	$2,300	$2,300	$4,300	$3,300	$3,000	$3,400	$2,900
Oct-2007	$4,700	$4,000	$5,100	$3,600	$3,100	$3,400	$3,400
Nov-2007	$2,200	$1,800	$6,100	$5,000	$4,300	$4,900	$4,000
Dec-2007	$3,900	$3,000	$4,700	$4,300	$3,900	$3,600	$3,100
Jan-2008	$3,800	$3,300	$5,100	$4,600	$4,800	$4,000	$2,700
Feb-2008	$5,300	$4,400	$5,200	$4,700	$4,000	$3,400	$2,900
Mar-2008	$5,300	$4,000	$5,500	$4,900	$4,800	$5,000	$3,900
Apr-2008	$3,400	$2,600	$4,900	$4,100	$4,100	$3,800	$3,300
May-2008	$3,300	$3,100	$3,800	$4,100	$3,300	$4,400	$3,200
Jun-2008	$2,400	$2,000	$5,000	$3,900	$2,500	$3,500	$2,800
Jul-2008	$2,000	$1,600	$3,000	$3,300	$1,500	$3,300	$3,200
Aug-2008	$2,400	$2,200	$3,000	$3,400	$1,500	$2,100	$2,400

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