BSE Sensex lost 376 points to 57,613.61 while NSE Nifty dropped 129 points to 16,970.95 during the morning trade on Monday. The top gainers on Nifty 50 were Dr Reddy, Divis Lab, Hindustan Unilever Ltd (HUL), Titan and BPCL while Adani Enterprises, Hindalco, Infosys, TCS and IndusInd Bank were some of the laggards.