The Bombay Stock Exchange benchmark Sensex reversed early losses to trade over 130 points in morning trade. The Sensex, which had lost over 167 points in the opening trade, was up by 131.25 points or 0.68 per cent at 19,373.61 level, with bank, oil and gas, metal and healthcare stocks making handsome recovery.Meanwhile, the broad-based National Stock Exchange index Nifty was up by 47.35 points to trade above 5,800 level at 5,813.85, after dipping to 5,721.15 point in the opening trade.Brokers said stocks turned positive as investors returned to buy frontline stocks at prevailing lower levels.