Equity benchmark Sensex surged over 350 points in early trade on Thursday, tracking gains in index-heavyweights Reliance Industries, HDFC and Infosys amid a largely positive trend in global markets. The 30-share BSE index was trading 361.24 points or 0.70 per cent higher at 52,210.72 in initial deals, and the broader NSE Nifty jumped 100.25 points or 0.64 per cent to 15,676.45.

Titan was the top gainer in the Sensex pack, rising over 4 per cent, followed by Reliance Industries, PowerGrid, Kotak Bank, HDFC, ONGC and Infosys. On the other hand, NTPC, Bajaj Auto, IndusInd Bank, Nestle India, Dr Reddy's, SBI and Sun Pharma were among the laggards. In the previous session, Sensex ended 85.40 points or 0.16 per cent lower at 51,849.48, while Nifty inched up 1.35 points or 0.01 per cent to 15,576.20.