Falling for the third straight day, the Sensex at the Bombay Stock Exchange fell 47 points, or 0.3 percent, to an over two-week low of 17,632, amid lackluster Asian and European markets, today. The Nifty at the National Stock Exchange lost 16 points, or 0.3 percent, to 5,335.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.