Trading activity that is conducted purely for the anticipated profit of the trading entity. The term is used to distinguish such trades from trading that is conducted for customers, for market-making, or for hedging.
Also called strategic trading. American Banker Glossary
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principal trading in which firm seeks direct gain rather than commission dollars. Bloomberg Financial Dictionary
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proprietary trading UK US noun [U] (also principal trading) STOCK MARKET, FINANCE
► trading by a financial organization to make a profit for itself rather than its customers: »
No more than a quarter of a bank's capital can be devoted to a single activity such as proprietary trading.
»proprietary trading activities/operations
Financial and business terms. 2012.