Shares of Life Insurance Corporation of India (LIC), the country's biggest insurer and largest domestic financial investor, plunged 2.86 per cent to settle at record closing low of Rs 777.40. The stock touched an all-time intraday low of Rs 775.40 on the BSE index. On NSE, LIC cracked 2.97 per cent to close at 776.50. Considering today's closing figure, LIC has plunged 18.08 per cent from its issue price of Rs 949.