Notice to Members
Notice No. 156
04/21/2004
Margin Rate and Tier Changes for Natural Gas Futures (NG), Henry Hub Swap Futures (NN), and Natural Gas e-miNY Futures (QG) Contracts
Effective Date: Thursday, April 22, 2004 (close of business)
Futures Contracts: Natural Gas, Henry Hub Swap, and e-miNY Natural Gas Contracts
Contract Months: All Natural Gas Contract Months


NG/NN Scan and Intra-Commodity Spread Tiers
Tiers New Old
1 1st Nearby 1st Nearby
2 2nd Nearby 2nd Nearby
3 3rd – 6th Nearby 3rd Nearby
4 7th – 12th Nearby 4th – 10th Nearby
5 13th – 18th Nearby 11th – 15th Nearby
6 Greater than 18th Nearby Greater than 15th Nearby


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
$3,500
$4,000
$3,850
$4,400
$4,725
$5,400
2
$3,000
$3,500
$3,300
$3,850
$4,050
$4,725
3
$3,000
$3,000
$3,300
$3,300
$4,050
$4,050
4
$3,000
$3,000
$3,300
$3,300
$4,050
$4,050
5
$2,000
$3,000
$2,200
$3,300
$2,700
$4,050
6
$1,500
$2,000
$1,650
$2,200
$2,025
$2,700


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
$875
$1,000
$963
$1,100
$1,181
$1,350
2
$750
$875
$825
$963
$1,013
$1,181
3
$750
$750
$825
$825
$1,013
$1,013
4
$750
$750
$825
$825
$1,013
$1,013
5
$500
$750
$550
$825
$675
$1,013
6
$375
$500
$413
$550
$506
$675


NYMEX Division Outright (Scan) Margin 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
$1,750
$2,000
$1,925
$2,200
$2,363
$2,700
2
$1,500
$1,750
$1,650
$1,925
$2,025
$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
$1,000
$1,100
$1,100
$1,350
$1,350
2
$1,000
$1,000
$1,100
$1,100
$1,350
$1,350
3
$500
$500
$550
$550
$675
$675
4
$1,000
$250
$1,100
$275
$1,350
$338
5
$100
$100
$110
$110
$135
$135
6
$100
$100
$110
$110
$135
$135


NYMEX Division Intra-Commodity Spread 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
$250
$275
$275
$338
$338
2
$250
$250
$275
$275
$338
$338
3
$125
$125
$138
$138
$169
$169
4
$250
$63
$275
$69
$338
$85
5
$25
$25
$28
$28
$34
$34
6
$25
25
$28
$28
$34
$34


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 2 will have its requirement (at the clearing member rates) calculated at $1,500 starting on Thursday, April 22, 2004.
One Long Tier 1 NG (1 * $3,500) =
$3,500
One Short Tier 2 NG (1 * $3,000)  
-
$3,000
Net Scan Risk ($3,500-$3,000) =
$500
Spread Rate (1* $1,000) =
+
$1,000
Total Requirement   =
$1,500


Summary
Clearing Member (Maintenance Margin):   1,500
Member Customer (Initial Margin):   $1,650
Non-Member Customer (Initial Margin):   $2,050

This notice supersedes all previous notices regarding margin rate for Natural Gas Futures, Henry Hub Swap, and Natural Gas e-miNY Futures contracts.
Should you have any questions or require any further information, please contact exchangeinfo@nymex.com