Equity benchmark Sensex soared 834 points on Tuesday, tracking strong gains in index majors HDFC twins, ICICI Bank and Reliance Industries amid an upbeat trend in global markets. The 30-share BSE index ended 834.02 points or 1.72 per cent higher at 49,398.29. Similarly, the broader NSE Nifty surged 239.85 points or 1.68 per cent to 14,521.15.