News Release

Exchange to Introduce Twelve New Electricity Contracts

Wed Jul 19 2006

New York, N.Y., July 19, 2006 — The New York Mercantile Exchange, Inc. today announced that will introduce 12 new electricity futures contracts on NYMEX ClearPort® on July 23 for trade date July 24.

The new contracts and their commodity codes are: ERCOT Houston peak swap (Platts Megawatt Daily) (HT); ERCOT Houston calendar day peak swap (Platts Megawatt Daily) (HE); ERCOT North peak swap (Platts Megawatt Daily) (MT); ERCOT North calendar day peak swap (Platts Megawatt Daily) (MC); ERCOT seller's choice peak swap (Platts Megawatt Daily) (VT); ERCOT seller's choice peak swap (Platts Megawatt Daily) (VC), ERCOT Houston MCPE trading hub peak swap (HN); ERCOT Houston MCPE trading hub calendar day peak swap (HY); ERCOT North MCPE trading hub peak swap (MN); ERCOT North MCPE trading hub calendar day peak swap (MY); ERCOT hub average MCPE trading hub peak swap (VN); and ERCOT hub average MCPE trading hub calendar day peak swap (VY) futures contracts.

The contract days listed will be the peak days remaining in the current month plus the following month. The first listed month for all monthly contracts will be September 2006. The contract units for the monthly contracts will be 40 megawatt hours per day multiplied by the number of peak days and 40 megawatt hours for of the all daily contracts. The minimum price fluctuation will be $0.05 per megawatt hour. The fees and cash settlement fees will each be $4.00 for monthly contracts and $0.20 per daily contracts.

The position accountability levels will be 5,000 contracts for any single month or all months. Expiration position limits will be 500 contracts, and a 25-contract reporting level will be in place for all of the above contracts.

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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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