The Sensex at the Bombay Stock Exchange surged 262 points, or 1.3 per cent, to 20,670 in opening trade on Wednesday, on strong foreign fund inflows, triggered by a rally in the global markets. After surrendering much of its initial gains, the Sensex still stood 102 points, or 0.5 percent in the green, at 20,510, a short while ago. Global markets also rallied, on expectations that major central banks, including the US central bank, will take steps to stimulate their economies, after an unexpected interest rate cut, on Tuesday, by the Bank of Japan. So key stock indices in Japan, Singapore, Indonesia, South Korea, Taiwan and Hong Kong were up by between 0.3 percent and 1.8 percent on Wednesday. Wall Street's Dow Jones Industrial Average had jumped 1.8 percent, overnight.