News Release

NYMEX to Change Margins for Heating Oil, RBOB Crack Spread Calendar Swap Futures Contracts

Thu May 15 2008

NEW YORK, N.Y., May 15, 2008-- The New York Mercantile Exchange, Inc. announced today that it will change margins for the heating oil and RBOB crack spread calendar swap futures contracts, beginning at the close of business tomorrow. 

 Margins for the first month of the New York Harbor heating oil crack spread calendar swap futures contract will increase to $3,150 from $2,750 for clearing members, to $3,465 from $3,025 for members, and to $4,253 from $3,713 for customers. The margins for the second month will increase to $3,050 from $2,500 for clearing members, to $3,355 from $2,750 for members, and to $4,118 from $3,375 for customers. Margins for third through 11th months will increase to $2,900 from $1,500 for clearing members, to $3,190 from $1,650 for members, and to $3,915 from $2,025 for customers. The margins for all other months will increase to $2,800 from $1,500 for clearing members, to $3,080 from $1,650 for members, and to $3,780 from $2,025 for customers. 

The margins for the first month of the RBOB crack spread calendar swap futures contract will decrease to $2,950 from $5,000 for clearing members, to $3,245 from $5,500 for members, and to $3,983 from $6,750 for customers. Margins for the second to fourth months will decrease to $2,850 from $3,000 for clearing members, to $3,135 from $3,300 for members, and to $3,848 from $4,050 for customers. The margins for fifth through 11th months will increase to $2,700 from $2,000 for clearing members, to $2,970 from $2,200 for members, and to $3,645 from $2,700 for customers.  Margins for all other months will be $2,650 for clearing members, $2,915 for members, and $3,578 for customers. 

Intra-commodity spread margins for the RBOB crack spread calendar swap futures contracts will remain unchanged. Intra-commodity spread margins for additional months will be $100 for clearing members, $110 for members, and $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: Anu Ahluwalia, 212-299-2439 or Keil Decker, 212-299-2209

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