Snapping a three-day rally, the Sensex at the Bombay Stock Exchange ended with a small loss of 17 points, or 0.1 percent, at 17,302, on profit-booking by investors, today. The Sensex had gained almost 190 points in the previous three trading sessions. The Nifty at the National Stock Exchange fell 9 points, or 0.2 percent, to 5,239.Stock markets in Japan, China, Hong Kong, Singapore and South Korea rose between 0.3 percent and 1.8 percent, on improved global economic data.