The 30-scrip sensitive index (Sensex) of the S&P Bombay Stock Exchange (BSE), which opened at 21,280.36 points, was trading at 21,203.43 points in the pre-noon session, down 6.30 points or 0.03 percent from the previous day's close at 21,209.73 points. The Sensex touched a high of 21,333.20 points and a low of 21,176.16 points during the trade so far.