News Release

NYMEX to Change Margins for Natural Gas Basis Swap Futures Contracts

Tue Jun 03 2008

NEW YORK, N.Y., June 3, 2008 -- The New York Mercantile Exchange, Inc. today announced margin changes for some of its natural gas basis swap futures contracts, beginning at the close of business tomorrow.

 Margins for the first to ninth months of the CIG Rockies basis swap futures contract will remain unchanged. The margins for all other months will increase to $750 from $500 for clearing members, to $825 from $550 for members, and to $1,013 from $675 for customers. 

The margins for the first month of the San Juan basis swap futures contract 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.

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. The margins for the second to ninth months will remain unchanged. Margins for the 10th to 16th months will increase to $700 from $600 for clearing members, to $770 from $660 for members, and to $945 from $810 for customers. Margins for all other months will increase to $500 from $400 for clearing members, to $550 from $440 for members, and to $675 from $540 for customers.

The margins for the first to 10th months of the Texas Eastern Zone M-3 swap futures contract 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 11th to 17th 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 all other months will remain the same.

The margins for the first month of the Transco Zone 6 basis swap futures contract will decrease to $1,500 from $2,000 for clearing members, to $1,650 from $2,200 for members, and to $2,025 from $2,700 for customers. Margins for the second to fifth months 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 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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