A benchmark index of Indian equities markets, the 30-scrip Sensitive Index (Sensex), on Tuesday was trading flat at 1.50 points or 0.01 percent up during the morning session.The wider 50-scrip Nifty of the National Stock Exchange (NSE) was also trading flat at 4.75 points or 0.06 percent down at 8,365.50 points.The Sensex of the S&P Bombay Stock Exchange (BSE), which opened at 27,633.66 points, was trading at 27,645.38 points (at 9.16 a.m.) in the early session, up 1.50 points or 0.01 percent from the previous day's close at 27,643.88 points.The Sensex touched a high of 27,655.57 points and a low of 27,603.02 points in the trade so far.Good buying was observed in metal and fast moving consumer goods sectors, while selling pressure was seen in power sector.