The Sensex at the Bombay Stock Exchange rose 120 points, or 0.6 per cent, to close at 19,365, today, on optimism that the Reserve Bank will ease monetary policy next month, even as the central bank kept key interest rates and the Cash Reserve Ratio unchanged in its policy review today. The Nifty at the National Stock Exchange gained 39 points, or 0.7 percent, to 5,897.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.