FII is an institution like a mutual fund, insurance company, pension fund etc. According to SEBI, “an FII is an institution established or incorporated outside India which proposes to make investment in India in securities”. FII is an institution who is registered under the Securities and Exchange Board of India (Foreign Institutional Investors) Regulations, 1995. FIIs comprised of a pension fund, a mutual fund, investment trust, insurance company or a reinsurance company.