News Release

NYMEX To Change Margins for Natural Gas Basis Swap Futures Contracts

Wed Nov 21 2007
NEW YORK, NY, November 21, 2007 -- The New York Mercantile Exchange, Inc. today announced margin changes for two of its natural gas basis swap futures contracts, effective at the close of business on November 26. 

Margins for the first month of the Texas Eastern Zone M-3 basis swap futures contract will increase to $500 from $200 for clearing members, to $550 from $220 for members, and to $675 from $270 for customers. The margins for all other months will remain unchanged.

Margins for the first month of the Transco Zone 6 basis swap futures contract will increase to $750 from $300 for clearing members, to $825 from $330 for members, and to $1,013 from $405 for customers. The 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: Brenda Guzman 212-299-2436 or  Keil Decker, 212-299-2209

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