Stock market today: The NSE Nifty fell 263.90 points, or 1.01 per cent, to end the session at 25,876.85. The 30-share BSE Sensex dropped 780.18 points, or 0.92 per cent, to close at 84,180.96, after hitting an intraday low of 84,110.10, down 851.04 points.