Snapping a four-day fall, the Sensex at the Bombay Stock Exchange gained 117 points, or 0.6 percent, to 18,314, in line with the rally in global stock markets, on Monday. The Sensex had lost more than 670 points in the last four trading sessions. The Nifty at the National Stock Exchange rose 35 points, or 0.6 percent,to 5,517. Global stock markets also climbed, with the bourses in Japan, Hong Kong, Singapore and South Korea gaining between 0.8 percent and 1.8 percent, after US lawmakers reached an eleventh-hour agreement to raise the country's debt ceiling and avoid a debt default.