Equity benchmark Sensex rallied over 300 points in opening trade on Monday, tracking gains in index majors HDFC twins, SBI and ICICI Bank amid mixed cues from global markets. The 30-share BSE index was trading 310.72 points or 0.61 per cent higher at 50,851.20, and the broader NSE Nifty surged 71.90 points or 0.47 per cent to 15,247.20.

PowerGrid was the top gainer in the Sensex pack, advancing over 2 per cent, followed by SBI, L&T, HDFC Bank, Maruti, Axis Bank and Dr Reddy's. On the other hand, Titan, M&M, IndusInd Bank and HUL were among the losers. In the previous session, Sensex soared 975.62 points or 1.97 per cent to finish at 50,540.48, and Nifty soared 269.25 points or 1.81 per cent to close at 15,175.30.