The Securities and Exchange Board of India (SEBI) regulates the securities markets in India. Its objectives are to protect investors, promote market development, and regulate securities markets. SEBI's functions include registering market intermediaries like stock exchanges and mutual funds, prohibiting unfair trade practices, regulating substantial acquisitions and takeovers, and promoting investor education. It regulates both primary markets like initial public offerings and secondary trading markets. SEBI oversees foreign institutional investments in India and sets guidelines for foreign investors.