Notice to Members
Notice No. 42
02/03/2004
Margin Rate Changes for Natural Gas Futures (NG), Henry Hub Swap Futures (NN), and Natural Gas e-miNY(sm) Futures (QG) Contracts
Effective Date: Wednesday, February 4, 2004 (close of business)
Futures Contracts: Natural Gas, Henry Hub Swap, and e-miNYsm Natural Gas Contracts
Contract Months: All Natural Gas Contract Months

NYMEX Division Outright 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
$5,500
$8,500
$6,050
$9,350
$7,425
$11,475
2
$3,500
$7,500
$3,850
$8,250
$4,725
$10,125
3
$3,000
$5,000
$3,300
$5,500
$4,050
$6,750
4
$3,000
$3,500
$3,300
$3,850
$4,050
$4,725
5
$3,000
$2,500
$3,300
$2,750
$4,050
$3,375
6
$2,000
$2,000
$2,200
$2,200
$2,700
$2,700


NYMEX Division Outright 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
$1,375
$2,125
$1,513
$2,338
$1,856
$2,869
2
$875
$1,875
$963
$2,063
$1,181
$2,531
3
$750
$1,250
$825
$1,375
$1,013
$1,688
4
$750
$875
$825
$963
$1,013
$1,181
5
$750
$625
$825
$688
$1,013
$844
6
$500
$500
$550
$550
$675
$675


NYMEX Division Outright Margins on Natural Gas e-miNYsm Futures (QG)
Tiers
Clearing Member /
Maintenance Margin
Member Customer
Initial Margin
Non-Member Customer
Initial Margin
New
Old
New
Old
New
Old
1
$2,750
$4,250
$3,025
$4,675
$3,713
$5,738
2
$1,750
$3,750
$1,925
$4,125
$2,363
$5,063


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 $3,000 starting on Wednesday, February 4, 2004.
One Long Tier 1 NG (1 * $5,500)
=
$5,500
One Short Tier 2 NG (1 * $3,500)
=
-
$3,500
Net Scan Risk ($5,500-$3,500)
=
$2,000
Spread Rate (1* $1,000)
=
+
$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

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