Stock Exchange surged 169 points, or 0.9 per cent, to close at 19,340, today, as tepid second quarter GDP growth numbers fuelled hopes of early interest rate cuts by the Reserve Bank. The Sensex had gained 665 points in the previous three trading sessions. The Nifty at the National Stock Exchange jumped 55 points, or 0.9 percent, to 5,880. Stock markets in Japan, China, Hong Kong, and Singapore gained between 0.5 percent and 0.9 percent.