The Sensex at the Bombay Stock Exchange gained 38 points, or 0.2 per cent, to 20,581 in opening trade, today, as Foreign Institutional Investors continued to pump money into the domestic equity markets, after the IMF said India's economy will expand by 9.7 per cent in 2010. After giving up much of its early gains, the Sensex stood 15 points, or 0.1 percent in the green, at 20,558, in very volatile trade, a short while ago. Other Asian markets in Japan, Singapore, South Korea, Taiwan, Hong Kong and Indonesia were down by between 0.1 percent and 1.3 percent.