News Release

Exchange to Expand Listed Months for Natural Gas Calendar Spread Options

Mon May 01 2006

NEW YORK, N.Y., May 1, 2006 — The New York Mercantile Exchange, Inc. today announced that it will list an option on the October 2007 / January 2008 intermonth spread for natural gas calendar spread options contracts, beginning tomorrow.

This is in addition to the current listing of 24 consecutive options on one-month spreads. Options on spreads between the first and third nearby months, the first and fourth nearby months, the second and fourth nearby months, as well as the spreads between the first nearby June to the first nearby December, first nearby December to first nearby June, the first nearby December to the second nearby December, first nearby October to the first nearby January, the first nearby April to the second nearby October and the first nearby October to the second nearby April contracts will continue to be listed for natural gas calendar spread options.

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Contact: Anu Ahluwalia , 212-299-2439

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