News Release

NYMEX to Change Margins for Natural Gas, Related Futures Contracts

Fri Jan 26 2007

NEW YORK, N.Y., January 26, 2007 — The New York Mercantile Exchange, Inc. today announced margin changes for its natural gas, Henry Hub swap and penultimate swap, natural gas penultimate and last day financial, and NYMEX miNYTM natural gas futures contracts, effective at the close of business on January 29.

Margins for the first month of the natural gas, natural gas penultimate financial and natural gas last day financial futures contracts will remain the same. Margins for the second month will decrease to $7,000 from $7,500 for clearing members, to $7,700 from $8,250 for members, and to $9,450 from $10,125 for customers. The margins for the third month will decrease to $6,000 from $6,500 for clearing members, to $6,600 from $7,150 for members, and to $8,100 from $8,775 for customers. Margins for all other months will remain the same.

Margins for the first month of the NYMEX miNY natural gas and Henry Hub swap and penultimate swap futures contracts remain the same. Margins for the second month will decrease to $1,750 from $1,875 for clearing members, to $1,925 from $2,063 for members, and to $2,363 from $2,531 for customers. The margins for the third month will decrease to $1,500 from $1,625 for clearing members, to $1,650 from $1,788 for members, and to $2,025 from $2,194 for customers. Margins for all other months will remain unchanged.

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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: Steffanie Marchese, 212-299-2455

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