Notice to Members

Notice No. 18
01/17/2007

New Margin Rates, Tiers, and Spread Credits for the NYMEX 321 PLUS Index Contracts

EFFECTIVE DATE: Monday, January 22, 2007 (close of business)

FUTURES CONTRACTS: NYMEX 321 PLUS Index Contracts (WX)

CONTRACT MONTHS: All Months

NYMEX Division Outright (Scan) Spread Tiers for NYMEX 321 PLUS Index Contracts (WX)

Tiers	*New*
1	All Months

NYMEX Division Outright (Scan) Margins for NYMEX 321 PLUS Index Contracts (WX)

	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
1	2,500	2,750	3,375

NYMEX Division Intra-Commodity Spread Tiers for NYMEX 321 PLUS Index Contracts (WX)

Tiers	*New*
1	All Months

Should you have any questions or require any further information, please contact exchangeinfo@nymex.com