News Release

NYMEX to Change Margins for Natural Gas, Related Futures Contracts

Fri Apr 25 2008

NEW YORK, NY, April 25, 2008 -- The New York Mercantile Exchange, Inc. today announced margin changes for its natural gas; Henry Hub swap, swing swap and penultimate swap; natural gas penultimate and last day financial; and NYMEX miNYTM natural gas futures contracts, effective at the close of business on April 28. 

Margins for the first and second months of the natural gas, natural gas penultimate financial, and natural gas last day financial futures contracts will increase to $7,250 from $6,250 for clearing members, to $7,975 from $6,875 for members, and to $9,788 from $8,438 for customers. The margins for the third to fifth months will increase to $7,500 from $6,500 for clearing members, to $8,250 from $7,150 for members, and to $10,125 from $8,775 for customers. Margins for the sixth to 10th months will increase to $7,750 from $7,000 for clearing members, to $8,525 from $7,700 for members, and to $10,463 from $9,450 for customers.  Margins for the 11th to 22nd months will increase to $5,500 from $5,000 for clearing members, to $6,050 from $5,500 for members, and to $7,425 from $6,750 for customers.  Margins for the 23rd to 34th months will increase to $4,500 from $4,000 for clearing members, to $4,950 from $4,400 for members, and to $6,075 from $5,400 for customers. The margins for the 35th to 46th months will increase to $4,250 from $3,750 for clearing members, to $4,675 from $4,125 for members, and to $5,738 from $5,063 for customers. The margins for all other months will increase to $3,750 from $3,250 for clearing members, to $4,125 from $3,575 for members, and to $5,063 from $4,388 for customers.

The margins for the first and second months of the NYMEX miNY natural gas and Henry Hub swap and penultimate swap futures contracts will increase to $1,813 from $1,563 for clearing members, to $1,994 from $1,719 for members, and to $2,447 from $2,109 for customers. The margins for the third to fifth months will increase to $1,875 from $1,625 for clearing members, to $2,063 from $1,788 for members, and to $2,531 from $2,194 for customers. Margins for the sixth to 10th months will increase to $1,938 from $1,750 for clearing members, to $2,131 from $1,925 for members, and to $2,616 from $2,363 for customers.   Margins for the 11th to 22nd months will increase to $1,375 from $1,250 for clearing members, to $1,513 from $1,375 for members, and to $1,856 from $1,688 for customers. Margins for the 23rd to 34th months will increase to $1,125 from $1,000 for clearing members, to $1,238 from $1,100 for members, to $1,519 from $1,350 for customers. Margins for the 35th to 46th months will increase to $1,063 from $938 for clearing members, to $1,169 from $1,031 for members, to $1,434 from $1,266 for customers. Margins for all other months will increase to $938 from $813 for clearing members, to $1,031 from $894 for members, and to $1,266 from $1,097 for customers.  

The margins for the Henry Hub swing swap futures contracts will increase to $1,813 from $1,563 for clearing members, to $1,994 from $1,719 for members, and to $2,447 from $2,109 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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