SEBI (Securities and Exchange Board of India) was established in 1988 to regulate securities markets in India and protect investors. It was granted legal status in 1992. SEBI acts as a watchdog to prevent market manipulation like price rigging and insider trading. It has protective, developmental, and regulatory functions. Its protective functions include checking price rigging and unfair trade practices. Its regulatory functions include framing rules, registering intermediaries like brokers, and inspecting stock exchanges.