New York Stock Exchange (NYSE) The oldest and largest stock exchange in the U.S., located on Wall Street in New York City. Responsible for setting policy, supervising member activities, listing securities, overseeing the transfer of member seats, and evaluating applicants. also called Big Board. see also listed, allied member, supervisory analyst, auction market, Designated Order Turnaround, Stock Clearing Corporation, graduated security, independent broker, Wall Street.
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