Equity benchmark Sensex dropped over 185 points in early trade on Monday, tracking losses in index-heavyweights HDFC twins, Infosys, TCS and Reliance amid a weak trend in the Asian markets. The 30-share BSE index was trading 189.52 points or 0.37 per cent lower at 51,233.36 in initial deals, and the broader NSE Nifty fell 43.20 points or 0.28 per cent to 15,392.45.

M&M was the top loser in the Sensex pack, shedding more than 5 per cent, followed by Infosys, HDFC, IndusInd Bank, Tech Mahindra, L&T, NTPC and HCL Tech. On the other hand, ITC, Asian Paints, Bharti Airtel and ICICI Bank were among the gainers. In the previous session, Sensex ended 307.66 points or 0.60 per cent higher at 51,422.88, and Nifty rose 97.80 points or 0.64 per cent to 15,435.65.