The Board of Trade Clearing Corporation has authorized the following margin changes effective with the mid-day margin calculation on Friday, June 14, 2002:

CBOT Margin Rates	From	To
Oats	$500	$400

MidAm Margin Rates	From	To
Oats	$100	$80

	From		To
CBOT Inter-Commodity Spread Credit Rates	Spread Savings %		Spread Savings %
U.S. Treasury Bond vs. 10-Year Treasury Note (1:1)	75%		80%
Mini U.S. Treasury Bond vs. 10-Year Treasury Note (2:1)	75%		80%
U.S. Treasury Bond vs. Mini 10-Year Treasury Note (1:2)	75%		80%
Mini U.S. Treasury Bond vs. Mini 10-Year Treasury Note (1:1)	75%		80%
U.S. Treasury Bond vs. 10-Year Treasury Note (1:2)	80%		85%
Mini U.S. Treasury Bond vs. 10-Year Treasury Note (1:1)	80%		85%
U.S. Treasury Bond vs. Mini 10-Year Treasury Note (1:4)	80%		85%
Mini U.S. Treasury Bond vs. Mini 10-Year Treasury Note (1:2)	80%		85%
U.S. Treasury Bond vs. 5-Year Treasury Note (1:1)	55%		70%
Mini U.S. Treasury Bond vs. 5-Year Treasury Note (2:1)	55%		70%
U.S. Treasury Bond vs. 5-Year Treasury Note (2:5)	75%		80%
Mini U.S. Treasury Bond vs. 5-Year Treasury Note (4:5)	75%		80%
U.S. Treasury Bond vs. Muni-Bond Index (1:1)	70%		75%
Mini U.S. Treasury Bond vs. Muni-Bond Index (2:1)	70%		75%
2-Year Treasury Note vs. 10-Year Treasury Note (1:1)	65%		70%
2-Year Treasury Note vs Mini 10-Year Treasury Note (1:2)	65%		70%
2-Year Treasury Note vs. 10-Year Treasury Note (3:2)	70%		75%
2-Year Treasury Note vs Mini 10-Year Treasury Note (3:4)	70%		75%
10-YearTreasury Note vs. Muni-Bond Index (1:1)	70%		75%
Mini 10-YearTreasury Note vs. Muni-Bond Index (2:1)	70%		75%
Agency Long Term vs. 10-Year Swap (1:1)	80%		85%
Agency Long Term vs. 5-Year Treasury Note (2:3)	75%		80%
Agency Long Term vs. 2-Year Treasury Note (2:3)	65%		80%

The Board of Trade Clearing Corporation has also authorized the following delivery month add-on charge and spread margin rate effective with the mid-day calculation on Friday, June 14, 2002:

CBOT Delivery Add-on Charge	From	To
Oats - July	$0	$200

MidAm Delivery Add-on Charge	From	To
Oats - July	$0	$40

	From		To
CBOT Inter-Commodity Spread Credit Rates	Spread Savings %		Spread Savings %
5-Year Treasury Note vs. 5 Year Swap (1:1)	---		75%

Should you have any questions, please call or e-mail one of the following Business Systems Analysts:

John Compall		john.compall@botcc.com
Shawn Gebbia	786-5748	shawn.gebbia@botcc.com
Marc MacQuarrie	786-5732	marc.macquarrie@botcc.com
Ross McDonald	786-3804	ross.mcdonald@botcc.com
Molly McMahon	786-5731	molly.mcmahon@botcc.com
Mark Steffen	786-5761	Mark.steffen@botcc.com
Jill Turner	786-5718	jill.turner@botcc.com
Thomas Andrews	Director	thomas.andrews@botcc.com
Business Systems Group E-Mail Address		bsg@botcc.com
BOTCC Web Site		http://www.botcc.com