New York, N.Y., August 4, 2008 -- The New York Mercantile Exchange, Inc. today announced margin changes to its Central Appalachian coal, Western Rail Powder River Basin coal swap, and Eastern Rail CSX coal swap futures contracts on NYMEX ClearPort, beginning at the close of business tomorrow.

Margins for the Central Appalachian coal futures contract will increase to $25,000 from $20,000 for clearing members, to $27,500 from $22,000 for members, and to $33,750 from $27,000 for customers.

The margins for the Western Rail Powder River Basin coal swap futures contract will decrease to $1,500 from $2,500 for clearing members, to $1,650 from $2,750 for members, and to $2,025 from $3,375 for customers

The margins for the Eastern Rail CSX coal swap futures contract will increase to $20,000 from $15,000 for clearing members, to $22,000 from $16,500 for members, and to $27,000 from $20,250 for customers.

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Contact: Brenda Guzman, 212-299-2436 or Anu Ahluwalia, 212-299-2439