Exchange, Users Protest Vendors' Mixing Of Nymex Data


A New York Mercantile Exchange (Nymex) official is disgruntled that market data vendors have been slow to break out prices generated by its Access after-hours order-matching system from open outcry session prices. Currently, only ADP and Reuters identify the Access prices separately; neither Dow Jones/Telerate nor Knight-Ridder have yet managed to separate the data, although officials at each say they plan to do so in the future.

Greenwich, Conn.-based fund manager John W. Henry & Co. sent a

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