Notice to Members

Notice No. 390
09/09/2005

Margin Rates for New NYMEX Division Natural Gas Basis Swap Contracts

EFFECTIVE DATE: Monday, September 12, 2005 (close of business)

FUTURES CONTRACTS: Sonat Basis Swap (SZ), Transco Zone 4 Swap (TR), Florida Gas Zone 3 Swap (FP)

CONTRACT MONTHS: All Months

NYMEX Division Outright (Scan) Margin for NYMEX Sonat (SZ), Transco Zone4 (TR), and Florida Gas Zone3 (FP) Natural Gas Basis Swap Futures Contracts

Tiers	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
All Months	$75	$83	$101

NYMEX Division Intra-Commodity Spread Margins for NYMEX Sonat (SZ), Transco Zone4 (TR), and Florida Gas Zone3 (FP) Natural Gas Basis Swap Futures Contracts

Tiers	Clearing Member / Maintenance Margin	Member Customer Initial Margin	Non-Member Customer Initial Margin
	*New*	*New*	*New*
All Months	$25	$28	$34

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