News Release

NYMEX to Change Margins for DME Oman Crude Oil Futures Contracts

Fri May 30 2008

New York, N.Y., May 29, 2008 --  The New York Mercantile Exchange, Inc. today announced margin changes for the DME Oman crude oil futures contact, effective at the close of business on June 2.

Margins will increase to $7,800 from $7,500 for clearing members, to $8,580 from $8,250 for members, and to $10,530 from $10,125 for customers.

Intra-commodity margins for the first month will increase to $450 from $400 for clearing members, to $495 from $440 for members, and to $608 from $540 for customers. The intra-commodity margins for the second to 18th months will increase to $400 from $250 for clearing members, to $440 from $275 for members, and to $540 from $338 for customers. Intra-commodity margins for the 19th to 42nd months will increase to $300 from $150 for clearing members, to $330 from $165 for members, and to $405 from $203 for customers. The intra-commodity margins for all other months will increase to $300 from $100 for clearing members, to $330 from $110 for members, and to $405 from $135 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 or Keil Decker, 212-299-2209

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