Good Till Canceled; a type of stock market order that remains active until the investor explicitly cancels it, rather than expiring at the end of a trading day.
Acronym formed from English words: Good (satisfactory), Till (until), Canceled (terminated); created as financial market jargon in the 20th century for investment trading terminology.
GTC orders show how financial markets speak their own language—regular people say 'keep trying to buy this' but traders say 'GTC'—it's efficient shorthand that controls millions of dollars daily.
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