Stock market today: The 30-share BSE Sensex rose 283.29 points, or 0.34 per cent, ending a volatile trading day at 83,734.25 after touching an intraday peak of 83,770.05. The broader 50-share NSE Nifty climbed 93.95 points, or 0.37 per cent, to finish at 25,819.35.