Snapping four days of gains, the Sensex at the Bombay Stock Exchange lost 130 points, or 0.7 percent, to 17,374, on profit-booking by investors, amid subdued global markets, today. The Sensex had gained over 400 points in the previous four trading sessions. The Nifty at the National Stock Exchange dropped 42 points, or 0.8 percent, to 5,291.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.