Notice to Members
Notice No. 339
09/13/2004
Margin Rates Changes for Natural Gas Futures (NG), Henry Hub Swap Futures (NN) and Natural Gas e-miNY Futures (QG) Contracts
EFFECTIVE DATE: Monday, September 13, 2004 (close of business)

FUTURES CONTRACTS: Natural Gas, Henry Hub Swaps and e-miNY Natural Gas Contracts

CONTRACT MONTHS: Tier 1, 2, 3, and 4 Outright Margin and Tier 1 Spread Margin for Natural Gas Contracts



Note: The revised margins are in bold.

NYMEX Division Outright (Scan) Margins on Natural Gas Futures (NG)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$4,000
$3,500
$4,400
$3,850
$5,400
$4,725
2
$4,000
$3,500
$4,400
$3,850
$5,400
$4,725
3
$4,500
$4,000
$4,950
$4,400
$6,075
$5,400
4
$4,500
$4,250
$4,950
$4,675
$6,075
$5,738
5
$3,000
$3,000
$3,300
$3,300
$4,050
$4,050
6
$2,000
$2,000
$2,200
$2,200
$2,700
$2,700
7
$2,500
$2,500
$2,750
$2,750
$3,375
$3,375
8
$3,000
$3,000
$3,300
$3,300
$4,050
$4,050
9
$1,000
$1,000
$1,100
$1,100
$1,350
$1,350


NYMEX Division Outright (Scan) Margins on Henry Hub Swap Futures (NN)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$1,000
$875
$1,100
$963
$1,350
$1,181
2
$1,000
$875
$1,100
$963
$1,350
$1,181
3
$1,125
$1,000
$1,238
$1,100
$1,519
$1,350
4
$1,125
$1,063
$1,238
$1,169
$1,519
$1,434
5
$750
$750
$825
$825
$1,013
$1,013
6
$500
$500
$550
$550
$675
$675
7
$625
$625
$688
$688
$844
$844
8
$750
$750
$825
$825
$1,013
$1,013
9
$250
$250
$275
$275
$338
$338


NYMEX Division Outright (Scan) Margins on Natural Gas e-miNY Futures (QG)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$2,000
$1,750
$2,200
$1,925
$2,700
$2,363
2
$2,000
$1,750
$2,200
$1,925
$2,700
$2,363

NYMEX Division Intra-Commodity Spread Margins on Natural Gas Futures (NG)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$1,000
$500
$1,100
$550
$1,350
$675
2
$500
$500
$550
$550
$675
$675
3
$500
$500
$550
$550
$675
$675
4
$500
$500
$550
$550
$675
$675
5
$500
$500
$550
$550
$675
$675
6
$500
$500
$550
$550
$675
$675
7
$500
$500
$550
$550
$675
$675
8
$500
$500
$550
$550
$675
$675
9
$250
$250
$275
$275
$338
$338


NYMEX Division Intra-Commodity Margins on Henry Hub Swap Futures (NN)
Tiers
Clearing Member / Maintenance Margin
Member Customer Initial Margin
Non-Member Customer Initial Margin
New
Old
New
Old
New
Old
1
$250
$125
$275
$138
$338
$169
2
$125
$125
$138
$138
$169
$169
3
$125
$125
$138
$138
$169
$169
4
$125
$125
$138
$138
$169
$169
5
$125
$125
$138
$138
$169
$169
6
$125
$125
$138
$138
$169
$169
7
$125
$125
$138
$138
$169
$169
8
$125
$125
$138
$138
$169
$169
9
$63
$63
$69
$69
$84
$84


Current systems calculate the margin requirement for spread positions by first determining the "Scan Risk" and then multiplying the number of spreads by a rate set by the Exchange. Scan Risk is determined by netting the outright margin required for each leg of a spread. Spreading between differently margined contracts results in a higher spread margin than between equally margined contracts. Below is provided an example where the legs of a spread are margined differently.

Scan Risk Example at Clearing Member Rates

A spread consisting of one NG leg in Tier 1 and another in Tier 6 will have its requirement (at the clearing member rates) calculated at $3,000 starting on Monday, September 13, 2004.
One Long Tier 1 NG 			(1 * $4,000) 	= $4,000 
One Short Tier 6 NG (1 * $2,000) = $2,000
Net Scan Risk ($4,000-$2,000) = $2,000
Spread Rate (1* $ 1000) = + $1,000
Total Requirement = $3,000

Summary
Clearing Member (Maintenance Margin): $3,000
Member Customer (Initial Margin): $3,300
Non-Member Customer (Initial Margin): $4,050
Should you have any questions or require any further information, please contact exchangeinfo@nymex.com