The Sensex at the Bombay Stock Exchange slumped 310 points, or 1.6 percent, to 19,387, today, on higher inflation numbers for March, and disappointing results by IT bellwether, Infosys. The Nifty dropped 87 points, or 1.5 percent, to 5,825. Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.