The Sensex at the Bombay Stock Exchange surged 341 points, or 1.7 percent, to 20,741, today, in the afternoon trade, a short while ago, on sustained buying by funds, amid firm Asian markets. The Sensex jumped following the Federal Reserve chief nominee, Janet Yellen's testimony on Thursday, which suggested that the Fed's accommodative policies would continue as long as the economy remains fragile. The US markets, in reaction to Janet Yellen's testimony, surged to a new record highs on Friday, when Indian markets remained closed for a holiday. The Nifty at the National Stock exchange shot up 100 points, or 1.6 percent, to 6,156. In Asia, other key benchmark indices in Taiwan, Hong Kong, China, Singapore, Indonesia and South Korea rose between 0.2 percent and 2.6 percent, in intra-day trade.