Stock Market Opening Bell: The BSE Sensex opened at 85,470.92 and is trading at 85,355.52, up 169.05 points or 0.20 per cent from the previous close of 85,186.47. The Nifty 50 also began on a positive note, opening at 26,132.10 and holding the same level in early trade, up 79.45 points or 0.30 per cent compared with its previous close of 26,052.65.