Search for the definition you are looking for.
New York Mercantile Exchange (Nymex)
US futures exchange, consisting of two divisions: the Nymex division and the Comex division. Along with metals futures and options, the exchange offers trading for energy futures and options in crude oil, heating oil, gasoline, natural gas and electricity, as well as propane futures and options on the crude oil/gasoline and crude oil/heating oil crack spreads. In August 2008, Nymex Holdings, the parent company of Nymex was acquired by CME Group. The exchange also operates the Nymex ClearPort® Services for clearing trades, as well as the Nymex ACCESS® system for after-hours trading when the open-outcry trading floor is not open.