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proprietary trader

 
 
noun [C] (also prop trader) STOCK MARKET, FINANCE

Definition

an employee of a financial organization who uses the organization’s money to trade in shares, stocks, bonds, etc. in order to make a profit for the organization rather than for its customers: The proprietary traders traded company money to increase bank profits and their own paychecks. A prop trader at Deutsche Bank lost $1.8bn in 2008.
(Definition of proprietary trader noun from the Cambridge Business English Dictionary © Cambridge University Press)

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