News Release

Exchange Announces Margins for New Natural Gas Swing Swap and Index Swap Futures Contracts

Fri Apr 22 2005
NEW YORK, N.Y., April 22, 2005 — The New York Mercantile Exchange, Inc., today announced margin rates for its 16 new natural gas index swap and swing swap futures contracts that will introduced on NYMEX ClearPortsm for trading and clearing on Monday.

Margins on the spot month of the Dominion index swap futures, TETCO M-3 index swap futures, and Transco Zone 6 index swap futures contracts will be $1,175 for clearing members, $1,293 for members, and $1,586 for customers. Margins on all other months will be $100 for clearing members, $110 for members, and $135 for customers.

Margins on the spot month of the PG&E Citygate index swap futures, Rockies index swap futures, SoCal Index swap futures, San Juan index swap futures, and Sumas index swap futures contracts will be $1,000 for clearing members, $1,100 for members, and $1,350 for customers. Margins on all other months will be $100 for clearing members, $110 for members, and $135 for customers.

Margins all months of the Dominion swing swap futures contract will be $1,200 for clearing members, $1,320 for members, and $1,620 for customers.

Margins on all months of the Kern Opal swing swap futures and PG&E Citygate swing swap futures contracts will be $1,600 for clearing members, $1,760 for members, and $2,160 for customers.

Margins on all months of the San Juan swing swap futures contract will be $2,200 for clearing members, $2,420 for members, and $2,970 for customers.

Margins on all months of the SoCal swing swap futures contract will be $2,400 for clearing members, $2,640 for members, and $3,240 for customers.

Margins on all months of the Sumas swing swap futures contract will be $1,400 for clearing members, $1,540 for members, and $1,890 for customers.

Margins on all months of the TETCO M-3 swing swap futures and Transco Zone 6 swing swap futures contracts will be $1,300 for clearing members, $1,430 for members, and $1,755 for customers.

Intra-commodity spread margins for all months of the Dominion index swap futures, PG&E Citygate index swap futures, Rockies index swap futures, SoCal index swap futures, San Juan index swap futures, Sumas index swap futures, TETCO M-3 index swap futures, and Transco Zone 6 index swap futures will be $25 for clearing members, $28 for members, and $34 for customers.

Intra-commodity spread margins for all months of the Dominion swing swap futures, Kern Opal swing swap futures, PG&E Citygate swing swap futures, San Juan swing swap futures, SoCal swing swap futures, Sumas swing swap futures, TETCO M-3 swing swap futures, and Transco Zone 6 swing swap futures contracts will be $100 for clearing members, $110 for members, and $135 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.

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