Notice to Members
Notice No. 375
10/07/2004
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: Friday, October 8, 2004 (close of business)
FUTURES CONTRACTS: Natural Gas, Henry Hub Swaps and e-miNY
  Natural Gas Contracts
CONTRACT MONTHS: Contract Month Realignment for Tier 7 and 8 Spread and Scan Tiers:, and Revised Outright Margin for Tier 1, 2, 3, 4 and 5

NG/NN Scan and Intra-Commodity Spread and Scan Tiers
Tiers
New
Old
1
1st Nearby
1st Nearby
2
2nd Nearby
2nd Nearby
3
3rd Nearby
3rd Nearby
4
4th Nearby
4th Nearby
5
5th Nearby
5th Nearby
6
6th Nearby
6th Nearby
7
7th – 14th Nearby
7th – 13th Nearby
8
15th – 29th Nearby
14th – 29th Nearby
9
Greater than 29th Nearby
Greater than 29th 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
$6,500
$6,000
$7,150
$6,600
$8,775
$8,100
2
$6,000
$5,500
$6,600
$6,050
$8,100
$7,425
3
$6,000
$5,500
$6,600
$6,050
$8,100
$7,425
4
$6,000
$5,500
$6,600
$6,050
$8,100
$7,425
5
$5,500
$5,250
$6,050
$5,775
$7,425
$7,088
6
$3,500
$3,500
$3,850
$3,850
$4,725
$4,725
7
$3,000
$3,000
$3,300
$3,300
$4,050
$4,050
8
$1,500
$1,500
$1,650
$1,650
$2,025
$2,025
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
$1,625
$1,500
$1,788
$1,650
$2,194
$2,025
2
$1,500
$1,375
$1,650
$1,513
$2,025
$1,856
3
$1,500
$1,375
$1,650
$1,513
$2,025
$1,856
4
$1,500
$1,375
$1,650
$1,513
$2,025
$1,856
5
$1,375
$1,313
$1,513
$1,444
$1,856
$1,772
6
$875
$875
$963
$963
$1,181
$1,181
7
$750
$750
$825
$825
$1,013
$1,013
8
$375
$375
$413
$413
$506
$506
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
$3,250
$3,000
$3,575
$3,300
$4,388
$4,050
2
$3,000
$2,750
$3,300
$3,025
$4,050
$3,713


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 5 will have its requirement (at the clearing member rates) calculated at $2,000 starting on Friday, October 8, 2004.

One Long Tier 1 NG (1 * $6,500)
=
$6,500
One Short Tier 5 NG (1 * $5,500)
=
$5,500
Net Scan Risk ($6,500-$5,500)
=
$1,000
Spread Rate (1* $ 1000)
=
+
$1,000
Total Requirement  
=
$2,000

Clearing Member (Maintenance Margin): $2,000
Member Customer (Initial Margin): $2,200
Non-Member Customer (Initial Margin): $2,700


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