The Financial Industry Regulatory Authority (FINRA) is a self-regulatory organization (SRO) in the United States responsible for regulating the securities industry. FINRA’s mission is to protect investors, maintain market integrity, and facilitate fair and efficient capital markets. It achieves this by enforcing securities industry rules and regulations, overseeing brokerage firms and professionals, and providing investor education. FINRA plays a critical role in ensuring the integrity of U.S. securities markets.