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English definition of “fill or kill order”

fill or kill order

noun [C]     ( abbreviation FOK) STOCK MARKET
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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