Mumbai, The BSE Sensex on Thursday bounced back by 283 pts to open at 37,946.80 on the strength of Materials, Metal, Energy, FMCG and IT stocks ahead of RBI policy today.The Nifty of National Stock Exchange too gained by 65 pts to 11,185.70. The sectoral indices include Metals, Materials, FMCG and IT stocks lifted the market in early trade.The Sensex registered intraday high and low at 37,976.72 and 37,762.32 pts respectively.The Nifty registered intraday high and low at 11,186.05 and 11,127.30 respectively.The Mid Cap moved up by 0.56 pc and Small Cap by 0.51 pc.In 30 scrips, 25 advanced while 5 declined.The gainers were ONGC by 2.08 pc to Rs 78.55, Tech Mahindra by 1.49 pc to Rs 658.55, Tata Steel by 1.28 pc to Rs 390.75, TCS by 1.44 pc to Rs 2291.40 and Tech Mahindra by 1.39 pc to Rs 657.85. The losers were Maruti Suzuki by 1.10 pc to Rs 6455.05, Bharti Airtel by 0.71 pc to Rs 554.90 and Axis Bank by 0.64 pc to Rs 432.05.