Snapping five days of losses, the Sensex at the Bombay Stock Exchange surged 359 points, or 1.7 percent, to close at 20,929, today, after the Reserve Bank announced its monetary policy review. The Nifty at the National Stock Exchange jumped 120 points, or 2 percent, to 6,221.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.