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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 from the Cambridge Business English Dictionary © Cambridge University Press)
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