Notice No. 585
November 14, 2008

Performance Bond Requirement Changes -- Margins for OQ, ZG and ZO

To receive advanced notification of Performance Bond (margin) changes, through our free automated mailing list, go to: http://www.cmegroup.com/newsletter/web2lead/web2sf-old.html 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., Clearing House Risk Management staff approved the performance bond requirements for the following products listed below. The rates are effective at the close of business on Monday, November 17th, 2008.

MARGIN RATE CHANGES FOR DME OMAN CRUDE OIL FUTURES (OQ), DME OMAN CRUDE OIL FINANCIAL FUTURES (ZG) CONTRACTS AND DME BRENT CRUDE OIL FINANCIAL CONTRACT (ZO)

Note: The revised margins are in bold

NYMEX Division Outright (Scan) Margins on OQ, ZG and ZO

	DME Clearing Member Initial Margin / Maintenance Margin		DME Member or NYMEX Member Initial Margin		DME Guaranteed Customer (Non-Member) Initial Margin
	*New*	Old	*New*	Old	*New*	Old
OQ	$11,500	$12,500	$12,650	$13,750	$15,525	$16,875
ZG	$11,500	$12,500	$12,650	$13,750	$15,525	$16,875
ZO	$8,500	$9,500	$9,350	$10,450	$11,475	$12,825

Should you have any questions or require any further information, please contact ExchangeInformation@cmegroup.com