News Release

NYMEX to Change Margins for Crude Oil, Related Futures Contracts

Wed May 28 2008

NEW YORK, N.Y., May 28, 2008 -- The New York Mercantile Exchange, Inc. today announced margin changes for its crude oil and related futures contracts, beginning at the close of business tomorrow.

Margins for the crude oil, crude oil calendar swap, and crude oil financial futures contracts will increase to $7,750 from $7,250 for clearing members, to $8,525 from $7,975 for members, and to $10,463 from $9,788 for customers.

The margins for the NYMEX miNYTM crude oil futures contract will increase to $3,875 from $3,625 for clearing members, to $4,263 from $3,988 for members, and to $5,231 from $4,894 for customers.

The margins for the NYMEX MACI index futures contract will increase to $1,550 from $1,450 for clearing members, to $1,705 from $1,595 for members, and to $2,092 from $1,958 for customers.

Intra-commodity spread margins for the first month of the crude oil, crude oil calendar swap, and crude oil financial futures contracts 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 spread 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 spread 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 spread 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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