A benchmark index of Indian equities markets Wednesday touched a record high of 28,126.48 points, surpassing its previous high of 28,027.96 points touched Nov 10.Good buying was observed in banking and auto sectors, while marginal selling pressure was seen in metal sector.The 30-scrip Sensitive Index (Sensex) of the S&P Bombay Stock Exchange (BSE), which opened at 27,958.64 points, was trading at 28,043.87 points (at 12.09 p.m.), up 133.81 points or 0.48 percent from the previous day's close at 27,910.06 points.The Sensex touched a high of 28,126.48 points and a low of 27,958.64 points in the trade so far.The S&P auto index gained 281.05 points and bankex went up by 213.43 points; while metal index dropped by 35.62 points.The wider 50-scrip Nifty of the National Stock Exchange (NSE) was also trading at 31.60 points or 0.38 percent up at 8,394.25 points after hitting record high of 8,415.05 earlier in the day.