News Release

NYMEX to Change Margins for Natural Gas, Related Futures Contracts

Tue Jan 29 2008

NEW YORK, NY, January 29, 2008 -- The New York Mercantile Exchange, Inc. today announced margin changes for its natural gas; Henry Hub swap, swing swap and penultimate swap; natural gas penultimate and last day financial; and NYMEX miNYTM natural gas futures contracts, effective at the close of business tomorrow. 

Margins for the first month of the natural gas, natural gas penultimate financial, and natural gas last day financial futures contracts will decrease to $5,000 from $5,500 for clearing members, to $5,500 from $6,050 for members, and to $6,750 from $7,425 for customers. The margins for the second month will decrease to $4,750 from $5,500 for clearing members, to $5,225 from $6,050 for members, and to $6,413 from $7,425 for customers. Margins for the third to seventh months will decrease to $4,250 from $5,000 for clearing members, to $4,675 from $5,500 for members, and to $5,738 from $6,750 for customers. Margins for the eighth to 13th months will remain unchanged.  Margins for the 14th to 19th months will decrease to $3,500 from $4,750 for clearing members, to $3,850 from $5,225 for members, and to $4,725 from $6,413 for customers.  The margins for all other months will remain the same.

The margins for the first month of the NYMEX miNY natural gas and Henry Hub swap and penultimate swap futures contracts will decrease to $1,250 from $1,375 for clearing members, to $1,375 from $1,513 for members, and to $1,688 from $1,856 for customers. The margins for the second month will decrease to $1,188 from $1,375 for clearing members, to $1,306 from $1,513 for members, and to $1,603 from $1,856 for customers. Margins for the third to seventh months will decrease to $1,063 from $1,250 for clearing members, to $1,169 from $1,375 for members, and to $1,434 from $1,688 for customers. Margins for the eighth to 13th months will remain unchanged. The margins for the 14th to 19th months will decrease to $875 from $1,188 for clearing members, to $963 from $1,306 for members, and to $1,181 from $1,603 for customers.  The margins for all other months will remain the same.

The margins for the Henry Hub swing swap futures contracts will decrease to $1,250 from $1,625 for clearing members, to $1,375 from $1,788 for members, and to $1,688 from $2,194 for customers.

Intra-commodity spread margins for the first month of the natural gas, natural gas penultimate financial, and natural gas last day financial futures contracts will decrease to $750 from $1,000 for clearing members, to $825 from $1,100 for members, and to $1,013 from 1,350 for customers. The intra-commodity spread margins for the second to 13th months will decrease to $500 from $750 for clearing members, to $550 from $825 for members, and to $675 from $1,013 for customers. The intra-commodity spread margins for all other months will remain the same.

The intra-commodity spread margins for the first month of the NYMEX miNY natural gas and Henry Hub swap and penultimate swap futures contracts will decrease to $188 from $250 for clearing members, to $206 from $275 for members, and to $253 from $338 for customers. The intra-commodity spread margins for the second to 13th months will decrease to $125 from $188 for clearing members, to $138 from $206 for members, and to $169 from $253for customers.  The intra-commodity spread margins for all other months will remain the same.

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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: Anu Ahluwalia 212-299-2439 or Keil Decker, 212-299-2209

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