News Release

Exchange to Change Margins for Gasoline, Related Futures Contracts

Thu Dec 29 2005

NEW YORK, N.Y., December 29, 2005 — The New York Mercantile Exchange, Inc., today announced that it will decrease the margins on its gasoline, New York Harbor gasoline calendar swap, and New York gasoline blendstock (RBOB) futures contracts, effective at the close of business tomorrow.

Margin for unleaded gasoline futures and New York Harbor gasoline calendar swap futures contracts will decrease to $4,000 from $4,500 for clearing members, to $4,400 from $4,950 for members, and to $5,400 from $6,075 for customers.

Margins rates on the New York Harbor gasoline blendstock futures contract will decrease to $4,000 from $4,500 for clearing members, to $4,400 from $4,950 for members, and to $5,400 from $6,075 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.

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