Performance Bond Requirement Changes-Effective Tuesday, February 12, 2008

Performance Bond (Margin) Advisory Notices

Clearing Member Firms; Chief Financial Officers; Back Office Managers; Margin Managers

From

CME Clearing

Subject

Performance Bond Requirement Changes-Effective Tuesday, February 12, 2008

Notice Date

2008-02-12

Notice Number

08-23

Effective Date

2008-02-12

To receive advanced notification of Performance Bond (margin) changes, through our free automated mailing list, go to: https:// www.cme-ch.com/listserve/addlistserve.asp and subscribe to the Performance Bond Rates Advisory Notices listserver.

As per the normal review of market volatility to ensure adequate collateral coverage, the Chicago Mercantile Exchange Inc., Performance Bond staff approved the performance bond requirements for the following products listed below. These margins are effective close of business on Tuesday, February 12, 2008.

SPAN ^® MINIMUM PERFORMANCE BOND REQUIREMENTS

CBOT Agricultural Futures Outright Rates

Wheat (CBOT) (W)

Rate Type	Change	Current Initial	Current Maintenance	New Initial	New Maintenance
Speculative - New Crop	Increase	$3,038	$2,250	$4,050	$3,000
Hedge/Member - New Crop	Increase	$2,250	$2,250	$3,000	$3,000

Mini-Wheat (CBOT) (YW)

Rate Type	Change	Current Initial	Current Maintenance	New Initial	New Maintenance
Speculative - New Crop	Increase	$608	$450	$810	$600
Hedge/Member - New Crop	Increase	$450	$450	$600	$600

Please contact the Risk Management Department at 312-648-3888, if you have any questions regarding these Performance Bond Changes.

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