FILL OR KILL ORDER (F.O.K.)

A trading order that is canceled unless executed within a designated time period. Used in the context of general equities. A market or limited price order which is to be executed in its entirety as soon as it is represented in the trading crowd, and, if not so executed, is to be treated as cancelled . For purposes of this definition, a stop is considered an execution. Equivalent to A.O.N. and I.O.C. simultaneously.