News Release

Exchange to Launch New Electricity Futures Contracts

Tue Aug 09 2005

NEW YORK, N.Y., August 9, 2005 — The New York Mercantile Exchange, Inc., announced today that it will introduce eight new electricity futures contracts beginning on August 15.

The contracts are as follows: Cinergy hub calendar–month LMP swap futures (EM), Cinergy hub off–peak LMP swap futures (EJ), Michigan hub calendar–month LMP swap futures (HM), Michigan hub off–peak LMP swap futures (HJ), MISO Illinois hub–calendar–month LMP swap futures (OM), MISO Illinois Off–Peak LMP swap futures (OJ), Minnesota hub calendar–month LMP swap futures (LM) and, Minnesota off–peak LMP swap futures (LJ).

The position accountability levels for all the electricity futures contracts will be 5,000 contracts for any single month or all months, with the exception of a 500-contract level for the last three days of the expiring contract. Clearing members must identify customers with a position of 25 contracts or more to the Exchange.

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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.

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