Indian stock markets started Thursday’s session on a positive note, with benchmark indices opening in the green. At around 9:18 am, the BSE Sensex was up 476 points, or 0.59%, at 81,791, while the Nifty rose 118 points, or 0.49%, to trade at 24,871. In early trading, the top performers so far include Zomato and Tata Motors.