The Bombay stock exchange benchmark Sensex today dipped to a low of 17,031 and finally ended at 17,052, down by 50 points owing to late selling in the market.National Stock Exchange index Nifty closed at 5,101, down by 23 points. Metal, oil and gas, realty, auto, capital goods, power and Pharma stocks witnessed selling pressure. However, buying interest was seen in the IT stocks. The BSE midcap and Smallcap indices were down by 0.73 percent and 0.65 percent.