Nifty, Sensex Today: Indian stock market investors rejoiced as the headline indices continued to gain for the second straight session. On April 16, the Sensex closed higher by 309.4 points or 0.4 per cent at 77,044.29 levels. The Nifty 50 index ended higher by 108.65 points or 0.47 per cent at 23,437.2 levels.