A benchmark index of Indian equities markets, the 30-scrip Sensitive Index (Sensex), on Thursday surged 106.62 points or 0.37 percent as banking stocks gained.The wider 50-scrip Nifty of the National Stock Exchange (NSE) was also trading 26.80 points or 0.31 percent up at 8,741.20 points.The Sensex of the S&P Bombay Stock Exchange (BSE), which opened at 28,858.42 points, was trading at 28,814.37 points (at 9.28 a.m.) in the early session, up 106.62 points or 0.37 percent from the previous day's close at 28,707.75 points.The Sensex touched a high of 28,875.08 points and a low of 28,788.66 points in the trade so far.Good buying was observed in banking, metal and IT sectors, while huge selling pressure was seen in healthcare sector.