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NYMEX To Change Margins For Financially Settled Electrucity Futures Contracts

Date 20/09/2006

The New York Mercantile Exchange, Inc. today announced margin changes for some of its financially settled electricity futures contracts on NYMEX ClearPort® beginning at the close of business tomorrow.

Margins for the first month of the PJM Western Hub LMP monthly peak electricity futures contract will decrease to $8,000 from $10,000 for clearing members, to $8,800 from $11,000 for members, and to $10,800 from $13,500 for customers. Margins for the second to fourth months will decrease to $7,000 from $8,000 for clearing members, to $7,700 from $8,800 for members, and to $9,450 from $10,800 for customers. Margins for the fifth and sixth months will decrease to $3,000 from $4,000 for clearing members, to $3,300 from $4,400 for members, and to $4,050 from $5,400 for customers. Margins for the seventh and eighth months will decrease to $5,000 from $6,000 for clearing members, to $5,500 from $6,600 for members, and to $6,750 from $8,100 for customers. Margins for the ninth to 12th months will decrease to $4,000 from $5,000 for clearing members, to $4,400 from $5,500 for members, and to $5,400 from $6,750 for customers. Margins for the 13th to 16th months will decrease to $2,500 from $3,500 for clearing members, to $2,750 from $3,850 for members, and to $3,375 from $4,725 for customers. Margins for all other months will decrease to $2,000 from $3,000 for clearing members, to $2,200 from $3,300 for members, and to $2,700 from $4,050 for customers.

Margins for the first month of the NYISO Zone A, Zone G, and Zone J peak electricity futures contract will decrease to $4,500 from $5,000 for clearing members, to $4,950 from $5,500 for members, and to $6,075 from $6,750 for customers. Margins for second to sixth months will decrease to $3,500 from $4,000 for clearing members, to $3,850 from $4,400 for members, and to $4,725 from $5,400 for customers. Margins for seventh to 11th months will decrease to $4,000 from $4,500 for clearing members, to $4,400 from $4,950 for members, and to $5,400 from $6,075 for customers. Margins for all other months will decrease to $2,000 from $2,500 for clearing members, to $2,200 from $2,750 for members, and to $2,700 from $3,375 for customers.