SEBI was established in 1988 and regulates India's securities markets. It aims to protect investors, develop orderly markets, and regulate market intermediaries like brokers. Key functions include prohibiting insider trading, price rigging, and fraudulent practices. SEBI took over regulation of commodity derivatives in 2015. An important case was the 1992 Harshad Mehta stock market scam where he illegally drew funds from banks using fake receipts to profit from stock trading. The document also provides details on SEBI's structure, regional offices, and management.