News Release

Exchange Announces Margin Rates for Five New Electricity Futures Contracts

Thu Jan 05 2006

New York, N.Y., January 5, 2006 — The New York Mercantile Exchange, Inc., today announced the margin rates for the five new electricity futures contracts that begin clearing and trading on NYMEX ClearPort® on January 8 for the trade date of January 9.

The margin rate for the Cinergy hub peak daily futures contract will be $1,000 for clearing members, $1,100 for members, and $1,350 for customers.

The margin rate for the ISO New England peak daily futures contract will be $1,500 for clearing members, $1,650 for members, and $2,025 for customers.

The margin rates for the NYISO Zone A peak daily futures, NYISO Zone J peak daily futures, and NYISO ZoneG peak daily futures contracts will be $3,000 for clearing members, $3,300 for members, and $4,050 for customers.

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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

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