The Bombay Stock Exchange benchmark Sensex fell by over 127 points in opening trade today on continued selling by foreign funds amid a subdued trend in global markets over weak US economic data and unrest in Saudi Arabia. The 30-share barometer, which lost 141.97 points in the previous session, lost another 127.61 points, or 0.69 per cent, to 18,200.37 points, with metals, IT and capital goods stocks leading the fall. In a similar fashion, the wide-based National Stock Exchange Nifty index moved down 43.80 points, or 0.79 per cent, to 5,450.60 points.