News Release

NYMEX to Change Margins for Natural Gas Swing, Basis Swap Futures Contracts

Wed Jan 03 2007

NEW YORK, NY, January 3, 2007 — The New York Mercantile Exchange, Inc. today announced that it will change margins for its natural gas swing swap and basis swap futures contracts, at the close of business tomorrow.

The margins for the PG&E Citygate swing swap futures contract will increase to $3,000 from $2,000 for clearing members, to $3,300 from $2,200 for members, and to $4,050 from $2,700 for customers.

Margins for the Kern River Opal, San Juan, and SoCal swing swap futures contracts 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.

The margins for the first month of the CIG Rockies basis swap futures contract will remain the same. Margins for the second month will increase to $900 from $750 for clearing members, to $990 from $825 for members, and to $1,215 from $1,013 for customers. The margins for all other months will remain unchanged.

Margins for the first month of the Transco Zone 3 basis swap futures contract will decrease to $150 from $250 for clearing members, to $165 from $275 for members, and to $203 from $338 for customers. The margins for all other months will remain unchanged.

Margins for the first to sixth months of the Columbia Gulf Onshore basis swap futures contract will remain the same. The margins for all other months will decrease to $100 from $150 for clearing members, to $110 from $165 for members, and to $135 from $203 for customers.

The margins for the first month of the Alberta gas basis swap futures contract will decrease to $1,200 from $1,500 for clearing members, to $1,320 from $1,650 for members, and to $1,620 from $2,025 for customers. Margins for the second month will decrease to $500 from $700 for clearing members, to $550 from $770 for members, and to $675 from $945 for customers. The margins for the third to sixth months will decrease to $500 from $950 for clearing members, to $550 from $1,045 for members, and to $675 from $1,283 for customers. Margins for the seventh to 12th months will decrease to $500 from $650 for clearing members, to $550 from $715 for members, and to $675 from $878 for customers. The margins for all other months will decrease to $300 from $350 for clearing members, to $330 from $385 for members, and to $405 from $473 for customers.

Margins for the first month of the ANR Oklahoma basia swap futures contract will remain unchanged. The margins for all other months will decrease to $500 from $600 for clearing members, to $550 from $660 for members, and to $675 from $810 for customers.

Margins for the first month of the San Juan basis swap futures contract will remain unchanged. The margins for the second month will decrease to $600 from $700 for clearing members, to $660 from $770 for members, and to $810 from $945 for customers. Margins for the third to sixth months will decrease to $500 from $800 for clearing members, to $550 from $880 for members, and to $675 from $1,080 for customers. The margins for the seventh to 12th months will decrease to $500 from $600 for clearing members, to $550 from $660 for members, and to $675 from $810 for customers. Margins for all other months will decrease to $300 from $400 for clearing members, to $330 from $440 for members, and to $405 from $540 for customers.

The margins for the first month of the Northwest Pipeline, Rockies basis swap futures contract will increase to $1,500 from $1,200 for clearing members, to $1,650 from $1,320 for members, and to $2,025 from $1,620 for customers. Margins for all other months will remain unchanged.

The margins for the first month of the SoCal basis swap futures contract will decrease to $1,000 from $1,200 for clearing members, to $1,100 from $1,320 for members, and to $1,350 from $1,620 for customers. Margins for all other months will remain the same.

The margins for the first month of the Waha basis swap futures contract will remain unchanged. Margins for the second to sixth months will decrease to $500 from $600 for clearing members, to $550 from $660 for members, and to $675 from $810 for customers. The margins for the seventh to 12th months will increase to $500 from $400 for clearing members, to $550 from $440 for members, and to $675 from $540 for customers. Margins for all other months will remain the same.

The margins for the first month of the Texas Eastern Zone M-3 basis swap futures contract will increase to $800 from $400 for clearing members, to $880 from $440 for members, and to $1,080 from $540 for customers. Margins for all other months will increase to $600 from $350 for clearing members, to $660 from $385 for members, and to $810 from $473 for customers.

The margins for the first month of the Transco Zone 6 basis swap futures contract will increase to $1,000 from $700 for clearing members, to $1,100 from $770 for members, and to $1,350 from $945 for customers. Margins for the second month will increase to $1,000 from $500 for clearing members, to $1,100 from $550 for members, and to $1,350 from $675 for customers. The margins for the third to sixth months will decrease to $400 from $500 for clearing members, to $440 from $550 for members, and to $540 from $675 for customers. Margins for the seventh to 12th months will decrease to $300 from $700 for clearing members, to $330 from $770 for members, and to $405 from $945 for customers. The margins for all other months will decrease to $400 from $700 for clearing members, to $440 from $770 for members, and to $540 from $945 for customers.

Margins for the first month of the CenterPoint basis swap futures contract will decrease to $500 from $800 for clearing members, to $550 from $880 for members, and to $675 from $1,080 for customers. The margins for all other months will increase to $300 from $250 for clearing members, to $330 from $275 for members, and to $405 from $338 for customers.

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Forward Looking and Cautionary Statements
This press release may contain forward–looking statements within the meaning of the Private Securities Litigation Reform Act, with respect to our future performance, operating results, strategy, and other future events. Such statements generally include words such as could, can, anticipate, believe, expect, seek, pursue, and similar words and terms, in connection with any discussion of future results. Forward–looking statements involve a number of assumptions, risks, and uncertainties, any of which may cause actual results to differ materially from the anticipated, estimated, or projected results referenced in forward–looking statements. In particular, the forward–looking statements of NYMEX Holdings, Inc., and its subsidiaries are subject to the following risks and uncertainties: the success and timing of new futures contracts and products; changes in political, economic, or industry conditions; the unfavorable resolution of material legal proceedings; the impact and timing of technological changes and the adequacy of intellectual property protection; the impact of legislative and regulatory actions, including without limitation, actions by the Commodity Futures Trading Commission; and terrorist activities and international hostilities, which may affect the general economy as well as oil and other commodity markets. We assume no obligation to update or supplement our forward–looking statements.

Contact: Brenda Guzman , 212-299-2436

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