News Release

NYMEX to Change Margins for Electricity Futures Contracts

Tue Mar 04 2008

NEW YORK, N.Y., March 4, 2007 -- The New York Mercantile Exchange, Inc. today announced margin changes for six of its electricity futures contract, beginning at the close of business tomorrow. 

Margins for the first month of the NYISO Zone A off-peak, NYISO Zone G off-peak, NYISO Zone J off-peak and ISO New England Hub LMP off-peak futures contracts will decrease to $4,500 from $5,000 for clearing members, to $4,950 from $5,500 for members, and to $6,075 from $6,750 for customers.  Margins for all other months will remain unchanged. 

The margins for the first month of the PJM Western Hub LMP off-peak electricity futures contract will increase to $6,000 from $5,000 for clearing members, to $6,600 from $5,500 for members, and to $8,100 from $6,750 for customers.  The margins for all other months will remain the same. 

Margins for the AEP Dayton Hub off-peak electricity futures contract will decrease to $3,500 from $4,000 for clearing members, to $3,850 from $4,400 for members, and to $4,725 from $5,400 for customers. The margins for all other months will remain unchanged.


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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: Steffanie Marchese, 212-299-2455 or David Garland, 212-299-2549

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