Recovering from initial losses, the Sensex at the Bombay Stock Exchange gained more than 100 points at one stage, today, before slipping into negative territory once again, in very volatile trade. After repeatedly moving into and out of the negative zone, the Sensex stood 27 points in negative territory, at 19,064, in afternoon deals, a short while ago. Earlier in the morning, the Sensex had opened 74 points in the red, at 19,017, dragged down by continued selling by funds, amid losses in the other Asian markets. The 30-share BSE index has already lost over 600 points in the last two trading sessions. Stock markets in Japan, China, Hong Kong, Indonesia, Singapore, South Korea and Taiwan were down by between 0.3 per cent and 1.3 per cent, today. The Asian markets fell after global rating agency, Standard and Poor's, on Monday downgraded the U.S. long-term credit outlook, fueling concerns that the global economic recovery may slow. So Wall Street's Dow Jones Industrial Average had slipped 1.1 per cent, overnight.