Snapping three days of gains, the Sensex at the Bombay Stock Exchange fell 63 points, or 0.3 per cent, to close at 19,424, today, on profit-booking by investors, even as the government won the vote on FDI in multi-brand retail in the Rajya Sabha. The Sensex had gained 182 points in the last three trading sessions. The Nifty at the National Stock Exchange declined 24 points, or 0.4 percent, to 5,907Stock markets in Japan, China, Hong Kong, South Korea and Singapore again ended mixed.