TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	August 8, 2005
SUBJECT:	Eurex US & Euro Link Margin Rates

The following margin intervals and spread credit rates are effective with the mid-day calculation on Wednesday, August 10, 2005:

Eurex US Margin Rates	From	To
10-Year Treasury Notes	$800	$850
5-Year Treasury Notes	$600	$550
3-Year Treasury Notes	$800	$650
2-Year Jumbo Treasury Notes	$2,200	$2,000
Russell 1000	$1,100	$1,000

Eurex US Inter-Commodity Spread Credit Rates	Spread Margin % From	Spread Savings % From	Spread Margin % To	Spread Savings % To
US Treasury Bonds vs 5-Year Treasury Notes (2:5)	25%	75%	20%	80%
US Treasury Bonds vs 2-Year Jumbo Treasury Notes (1:1)	40%	60%	35%	65%
Russell 1000 vs Russell 2000 (1:1)	30%	70%	35%	65%

Euro Link Inter – Exchange Spread Credits	Spread Credit From	Spread Credit To
Euro-Bobl vs 3-Year Treasury Notes (1:1)	60%	0%
Euro-Bobl vs 10-Year Treasury Notes (1:1)	60%	55%
Euro-Bobl vs US Treasury Bonds (1:1)	50%	40%

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