The wider 50-scrip Nifty of the National Stock Exchange (NSE) was also trading higher at 8,314.10 points, with a gain of 62.40 points or 0.76 percent.
The 30-share Sensex opened at 27,529.42 points, against the previous close at 27,287.66 points on Wednesday. At 9.40 a.m., it was ruling at 27,509.50 points, with a gain of 221.84 points, or 0.81 percent. Trading on the BSE and NSE remained closed on Thursday on account of Dussehra.