National Association of Securities Dealers, Inc.

American organization

Also known as: NASD

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Last updated

July 1, 2026

Quick Summary

The National Association of Securities Dealers, Inc. (NASD) was an American organization created in 1939 by an act of Congress. Its primary purpose was to establish rules of conduct and protect investors from abuses within the over-the-counter (OTC) market. The OTC market involves the trading of stocks and bonds that do not occur on stock exchanges.1

In 2007, NASD merged with a sector of the New York Stock Exchange to form the Financial Industry Regulatory Authority (FINRA), which is now the main regulatory body for the OTC market in the United States.1

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NYSE Amex Equities
…Amex was part of the National Association of Securities Dealers (NASD) from 1998 to 2004, when ownership of the Amex returned to private hands. Unlike many other exchanges around the world, it did not relinquish floor trading in favour of computer trading, and, at the beginning of the 21st century,…
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…Amex was part of the National Association of Securities Dealers (NASD) from 1998 to 2004, when ownership of the Amex returned to private hands. Unlike many other exchanges around the world, it did not relinquish floor trading in favour of computer trading, and, at the beginning of the 21st century,…
Read More

over-the-counter market
…has been effected through the National Association of Securities Dealers, Inc. (NASD), created in 1939 by an act of Congress to establish rules of conduct and protect members and investors from abuses. In 2007 NASD merged with a sector of the New York Stock Exchange to form the Financial Industry…
Read More
…has been effected through the National Association of Securities Dealers, Inc. (NASD), created in 1939 by an act of Congress to establish rules of conduct and protect members and investors from abuses. In 2007 NASD merged with a sector of the New York Stock Exchange to form the Financial Industry…
Read More