News Release

NYMEX to Expand Floor Trading Hours for Energy Contracts

Thu Dec 14 2006

NEW YORK, N.Y., December 14, 2006 — The New York Mercantile Exchange, Inc. today announced that it intends to expand the open outcry trading hours for its energy futures and options contracts.

Opening times for the crude oil futures and options, natural gas futures and options, heating oil futures and options, and gasoline futures and options markets would change to 9:00 AM from 10:00 AM, beginning on February 1, 2007. The close of the trading floor will remain 2:30 PM. The crack spread markets and financially settled options markets will also adopt these new trading hours

NYMEX President and Chief Executive Officer James E. Newsome said, "We believe the expansion of open outcry trading hours will benefit market participants as a whole as the bulk of energy trading still occurs during trading floor hours."

Before the proposed change can become effective, it is subject to a consent process that includes a 15-day notice to the owners of Class A memberships.

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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

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