Equity benchmark Sensex rose over 100 points in opening trade on Wednesday, tracking gains in IT stocks amid sustained foreign fund inflow. The 30-share Sensex, however, turned choppy to trade 36.75 points or 0.06 per cent lower at 58,968.52. Similarly, Nifty slipped 10.45 points or 0.06 per cent to 17,551.55 in initial deals. HDFC was the top loser in the Sensex pack,