Mumbai : Indian benchmark indices opened strong on March 31 with Nifty above 17200. The Sensex was up 584.79 points or 1.01% at 58,544.88, and the Nifty was up 161.70 points or 0.95% at 17,242.40. About 1532 shares advanced, 439 shares declined, and 148 shares unchanged. Adani Enterprises, Nestle India, Reliance Industries, Adani Ports and HCL Technologies were among major gainers on the Nifty, while losers were Coal India, Asian Paints, ITC, Divis Labs and SBI Life Insurance.