The Bombay Stock Exchange benchmark Sensex has gained about 103 points in early trade on heavy foreign capital inflows. The 30-share index Sensex rose by 0.61 per cent, to 17,200.47 points with stocks of metals, realty and auto sectors leading the recovery. The BSE barometer had ended 21.48 points down in the previous trading session.The wide-based National Stock Exchange index Nifty moved up by 22.70 points,to 5,128.40 points. Brokers said trading sentiments turned better after advance tax paid by companies suggested stronger earnings for the December quarter.