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fill or kill order

 
 
noun [C] (abbreviation FOK) STOCK MARKET

Definition

an instruction to a broker (= someone who buys and sells shares, etc. for other people) to buy or sell particular stocks or shares immediately: But unlike a fill or kill order, it isn't cancelled if it's not executed immediately.
(Definition of fill or kill order noun from the Cambridge Business English Dictionary © Cambridge University Press)

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