Define: NASD

Quick Summary of NASD

The National Association of Securities Dealers (NASD) is responsible for regulating and overseeing the securities industry in the United States. Their role is to ensure that companies and individuals selling stocks, bonds, and other investments adhere to the rules and treat investors fairly, acting as a referee to ensure fair play.

Full Definition Of NASD

The National Association of Securities Dealers (NASD) is a self-regulatory organisation that oversees securities firms and brokers in the United States. To buy or sell stocks, individuals must use a broker who is a member of NASD. This organisation sets rules and regulations for brokers to follow, ensuring they act in the best interests of their clients. By regulating broker behaviour, NASD protects investors and promotes fair treatment and transparency in the securities markets.


NASD stands for the National Association of Securities Dealers, which was a self-regulatory organisation that oversaw the activities of broker-dealers in the United States. It was later merged with the regulatory functions of the New York Stock Exchange to form the Financial Industry Regulatory Authority (FINRA).

NASD was responsible for regulating and overseeing the activities of broker-dealers, including the enforcement of securities laws, licensing of brokers, and the operation of the Nasdaq stock market.

No, NASD ceased to exist as a separate entity after its merger with the regulatory functions of the New York Stock Exchange in 2007. Its regulatory responsibilities were transferred to FINRA.

NASD was primarily focused on regulating broker-dealers, while FINRA has a broader mandate that includes overseeing the activities of brokerage firms, registered representatives, and the securities industry as a whole.

Since NASD no longer exists, you would need to file a complaint with FINRA, which has taken over the regulatory functions previously handled by NASD.

As NASD no longer exists, you can check if a broker is registered with FINRA by using their BrokerCheck tool available on their website.

Yes, NASD had the authority to enforce securities laws and regulations, including the ability to investigate and discipline broker-dealers for violations.

NASD enforced a wide range of violations, including fraudulent activities, insider trading, failure to disclose material information, and other violations of securities laws and regulations.

While NASD no longer exists, historical data from the Nasdaq stock market, which was operated by NASD, may still be available through various financial data providers.

You can contact FINRA through their website or by calling their toll-free Investor Helpline for assistance with any questions or concerns related to broker-dealers or the securities industry.


This site contains general legal information but does not constitute professional legal advice for your particular situation. Persuing this glossary does not create an attorney-client or legal adviser relationship. If you have specific questions, please consult a qualified attorney licensed in your jurisdiction.

This glossary post was last updated: 30th April 2024.

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