Mumbai, Nov 20 - Losing three days' winning streak, a benchmark index of Indian equities markets was trading 108.09 points or 0.52 percent down in the pre-noon session Wednesday.

Heavy selling pressure was seen on banking index (bankex), auto and capital goods sectors, while marginal good buying was observed in oil and gas sector.

The 30-scrip sensitive index (Sensex) of the S&P Bombay Stock Exchange (BSE), which opened at 20,857.01 points, was trading at 20,782.73 points in the pre-noon session, down 108.09 points or 0.52 percent from previous day's close at 20,890.82 points.

The Sensex touched a high of 20,880.03 points and a low of 20,764.82 points during the trade so far.

The S&P BSE bankex tanked 153.74 points, auto slipped by 69.73 points and capital goods dropped by 51.07 points. However, oil and gas marginally gained 27.54 points.

The wider 50-scrip Nifty of the National Stock Exchange (NSE) was also trading down at 34.20 points or 0.55 percent at 6,169.15 points. (IANS)