The Sensex at the Bombay Stock Exchange rose 53 points, or 0.3 per cent, to 17,446 in opening trade, this morning, on sustained buying by funds and retail investors. Later, after slipping into the red, the Sensex again recovered, to stand a good 96 points, or 0.6 per cent in positive territory, at 17,488, in volatile trade, a short while ago. The 30-share Sensex had gained nearly 300 points in the previous three trading sessions. But other Asian markets in Japan, China, Singapore, Indonesia and South Korea were down by between 0.1 percent and 0.8 percent, today, ahead of a key Spanish bond sale that will test the market's risk appetite. Across on Wall Street, the US Dow Jones Industrial Average had slipped 0.6 per cent, overnight.