News Release

NYMEX to Change Margins for Heating Oil Crack Spread Calendar Swap Futures Contract

Thu May 22 2008

NEW YORK, N.Y., May 22, 2008 -- The New York Mercantile Exchange, Inc. today announced margin changes for its New York Harbor heating oil crack spread calendar swap futures contract, effective at the close of business tomorrow.

Margins for the first month will increase to $4,000 from $3,150 for clearing members, to $4,400 from $3,465 for members, and to $5,400 from $4,253 for customers. The margins for the second month will increase to $4,000 from $3,050 for clearing members, to $4,400 from $3,355 for members, and to $5,400 from $4,118 for customers. Margins for the third to 11th months will increase to $4,000 from $2,900 for clearing members, to $4,400 from $3,190 for members, and to $5,400 from $3,915 for customers. The margins for all other months will increase to $4,000 from $2,800 for clearing members, to $4,400 from $3,080 for members, and to $5,400 from $3,780 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, 212-299-2549

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