Equity benchmark Sensex jumped over 150 points in opening trade on Thursday, but soon turned red tracking losses in index majors Axis Bank, TCS and Bajaj Finance amid negative global cues. The 30-share BSE index was trading 53.09 points or 0.11 per cent lower at 49,849.55, and the broader NSE Nifty declined 48.45 points or 0.32 per cent to 14,981.70.