Equity benchmark Sensex rallied over 300 points in early trade on Friday tracking gains in index majors Reliance Industries, HDFC twins and ICICI Bank amid positive cues from global markets. The 30-share  BSE index was trading 306.57 points or 0.60 per cent higher at 51,421.79, and the broader NSE Nifty surged 101.15 points or 0.66 per cent to 15,439.

ONGC was the top gainer in the Sensex pack, jumping over 3 per cent, followed by Reliance Industries, SBI, IndusInd Bank, HDFC, ICICI Bank and Axis Bank. On the other hand, Sun Pharma, Dr Reddy's, M&M, Bajaj Auto and Nestle India were among the laggards. In the previous session, Sensex ended 97.70 points or 0.19 per cent higher at 51,115.22, and Nifty rose 36.40 points or 0.24 per cent to 15,337.85.