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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 3rd, 2008.

MARGIN RATE CHANGE FOR CRUDE OIL MACI INDEX CONTRACT (XC)

Note: The revised margins are in bold

NYMEX Division Outright (Scan) Margins on NYMEY MACI Index Futures Contract (XC)

	Clearing Member / Maintenance Margin		Member Customer Initial Margin		Non-Member Customer Initial Margin
	*New*	Old	*New*	Old	*New*	Old
XC	$1,750	$1,767	$1,925	$1,944	$2,362	$2,385

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