At close, the Sensex was down 333.93 points or 0.64% at 51,941.64, and the Nifty was down 104.70 points or 0.67% at 15,635.40 dragged mainly by sell-off in public sector banks and auto stocks in the second half. Power Grid was the top Sensex gainer followed by NTPC, Titan, and Asian Paints. Reliance Industries, Bharti Airtel, and Larsen & Toubro were the worst performers. About 1425 shares have advanced, 1697 shares declined, and 139 shares are unchanged. All the Nifty sectoral ended today's session in the red, with Nifty Auto, Nifty PSU Bank, and Nifty Realty indexes falling over 1 percent, each. The S&P BSE MidCap and SmallCap indices ended the session 0.71 percent and 0.95 percent lower, respectively. India VIX trimmed some losses but closed 3% lower.