News Release

NYMEX to Change Margins for Electricity Futures Contracts

Thu Apr 03 2008
New York, N.Y., April 3, 2008 -- The New York Mercantile Exchange, Inc. announced today that it will change margins for several of its electricity futures contracts, beginning at the close of business tomorrow.
 
Margins for the first month of the Northern Illinois hub peak electricity futures contract will increase to $9,000 from $7,000 for clearing members, $9,900 from $7,700 for members, and to $12,150 from $9,450 for customers. Margins for the second to 11th months will remain unchanged. Margins for all other months will increase to $4,000 from $3,500 for clearing members, to $4,400 from $3,850 for members, and to $5,400 from $4,725 for customers.
Margins for the first month of the AEP-Dayton hub peak electricity futures contract will decrease to $9,000 from $10,000 for clearing members, $9,900 from $11,000 for members, and to $12,150 from $13,500 for customers. Margins for the second to 11th months will remain unchanged. Margins for all other months will increase to $4,000 from $3,500 for clearing members, to $4,400 from $3,850 for members, and to $5,400 from $4,725 for customers.

Margins for the first month of the Cinergy Hub LMP peak electricity futures contract will decrease to $2,000 from $3,500 for clearing members, $2,200 from $3,850 for members, and to $2,700 from $4,725 for customers. Margins for the second to sixth months will increase to $4,000 from $3,500 for clearing members, to $4,400 from $3,850 for members, and to $5,400 from $4,725 for customers. Margins for the seventh to 11th months will increase to $5,000 from $3,500 for clearing members, to $5,500 from $3,850 for members, and to $6,750 from $4,725 for customers. Margins for all other months will increase to $4,000 from $3,000 for clearing members, to $4,400 from $3,300 for members, and to $5,400 from $4,050 for customers.
Margins for the first month of the ISO New England internal hub peak electricity futures contract will decrease to $5,000 from $6,000 for clearing members, to $5,500 from $6,600 for members, and to $6,750 from $8,100 for customers. Margins for the second to sixth months 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. Margins for the seventh to 11th months will increase to $7,000 from $3,500 for clearing members, to $7,700 from $3,850 for members, and to $9,450 from $4,725 for customers. Margins for all other months will increase to $5,000 from $2,500 for clearing members, to $5,500 from $2,750 for members, and to $6,750 from $3,375 for customers.
 
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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 or Keil Decker, 212-299-2209

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