The 30-scrip sensitive index (Sensex) of the Bombay Stock Exchange (BSE), which opened at 17,981.06 points, was trading at 17,942.41 points, 49.59 points or 0.28 percent down from its previous close at 17,992 points.
At the National Stock Exchange (NSE), the broader 50-share S&P CNX Nifty was ruling a meagre 0.06 percent up at 5,401.05 points.