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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.

NEW MARGIN RATES AND TIERS FOR

Outright (Scan) Spread Tiers for W1, W3, W8, Y2, Z2, P1 and P6

Tiers	*New*
1	All Months

NYMEX Division Outright (Scan) Margin on W1, W3, W8, Y2, Z2, P1 and P6

Commodity	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
W1	$8,500	$9,350	$11,475
W3	$8,000	$8,800	$10,800
W8	$6,500	$7,150	$8,775
Y2	$10,500	$11,550	$14,175
Z2	$8,500	$9,350	$11,475
P1	$2,000	$2,200	$2,700
P6	$2,000	$2,200	$2,700

Intra-Commodity Spread Tiers for W1, W3, W8, Y2, Z2, P1 and P6

Tiers	*New*
1	All Months

NYMEX Division Intra-Commodity Spread Margins on W1, W3, W8, Y2, Z2, P1 and P6

Commodity	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
W1	$850	$935	$1,148
W3	$800	$880	$1,080
W8	$650	$715	$878
Y2	$1,050	$1,155	$1,418
Z2	$850	$935	$1,148
P1	$200	$220	$270
P6	$200	$220	$270

Spot Assessment Margins For P1 and P6

Commodity	Clearing Member Assessments	Member Customer Assessments	Non-Member Customer Assessments
	New	New	New
P1	$3,000	$3,300	$4,050
P6	$3,000	$3,300	$4,050