Notice to Members
Notice No. 163
04/01/2003
Spot Month Margins for NYISO A, NYISO G and NYISO J Electricity Futures Contracts
Futures Contracts: NYISO A (KA), NYISO G (KG), and NYISO J (KJ)
Contract Months: Spot Month

Due to the average price settlement process on the NYISO futures contracts during the cash settlement period (Spot-Month) of the NYISO Electricity Futures Contracts, margins are reduced on a pro rata basis. This is dependent upon the number of business days during the calendar month of these contracts. Each day, the spot month margin is reduced by the reciprocal of the number of business days during the month. For example, in April 2003, there are 21 business days during the month. Each day the margin will be reduced by one-twenty first (4.76%) of the original margin.

For example, the April 2003 Contracts for NYISO Zone J have initial Clearing Member Margins of $5,000, and Zones A & G, have Clearing Member Margin of $3,750. In addition, each has an assessment of $3,500. The spot month initial margin levels would be:

Clearing Member Margin
Date Zone J Zone A & Zone G Spot Assessment Zone J Zone A & Zone G
1-Apr $5,000 $3,750 $3,500 $8,500 $7,250
2-Apr $4,762 $3,571 $3,500 $8,262 $7,071
3-Apr $4,524 $3,393 $3,500 $8,024 $6,893
4-Apr $4,286 $3,214 $3,500 $7,786 $6,714
7-Apr $4,048 $3,036 $3,500 $7,548 $6,536
8-Apr $3,810 $2,857 $3,500 $7,310 $6,357
9-Apr $3,571 $2,679 $3,500 $7,071 $6,179
10-Apr $3,333 $2,500 $3,500 $6,833 $6,000
11-Apr $3,095 $2,321 $3,500 $6,595 $5,821
14-Apr $2,857 $2,143 $3,500 $6,357 $5,643
15-Apr $2,619 $1,964 $3,500 $6,119 $5,464
16-Apr $2,381 $1,786 $3,500 $5,881 $5,286
17-Apr $2,143 $1,607 $3,500 $5,643 $5,107
21-Apr $1,905 $1,429 $3,500 $5,405 $4,929
22-Apr $1,667 $1,250 $3,500 $5,167 $4,750
23-Apr $1,429 $1,071 $3,500 $4,929 $4,571
24-Apr $1,190 $893 $3,500 $4,690 $4,393
25-Apr $952 $714 $3,500 $4,452 $4,214
28-Apr $714 $536 $3,500 $4,214 $4,036
29-Apr $476 $357 $3,500 $3,976 $3,857
30-Apr $238 $179 $3,500 $3,738 $3,679


Member Customer Margins are 10% higher, while Non-Member Customers are 35% higher. This notice supersedes all previous notices regarding margins for the NYMEX NYISO A, NYISO G, NYISO J Futures Contracts.
Should you have any questions or require any further information, please contact exchangeinfo@nymex.com