Mumbai: Key Indian equity market indices opened in the green on Friday following global cues. The 30-scrip Sensitive Index (Sensex) was trading 276.98 points or 0.99 per cent higher during the early session. The wider 51-scrip Nifty of the National Stock Exchange (NSE) was also trading 78.75 points or 0.92 per cent higher at 8,670.90 points. The BSE Sensex, which opened at 27,919.95 points, was trading at 28,136.58 points (at 10.17 a.m.) in the early session, higher 276.98 points or 0.99 per cent from the previous day's close at 27,859.60 points. The Sensex touched a high of 28,148.56 points and a low of 27,900.91 points in the trade so far.