The 30-share index, which had ended 164.11 points higher on Friday, slipped by 62.09 points, or 0.30 percent, to 20,638.66 in morning trade, with stocks of PSUs, banking, metal and IT sectors leading the fall.
Also, the National Stock Exchange index Nifty shed 13.25 points, or 0.22 percent, to 6,142.20. Brokers said besides a weak trend in the Asian region, profit-booking by participants influenced the trading sentiment.
Bucking the trend, power sector stocks such as Tata Power and Adani Power were trading in the positive zone with gains up to 5.21 percent after reports that the electricity regulator allowed these companies to raise tariffs. Reliance Power was also trading 1.43 percent higher.
Meanwhile, among other Asian markets, Hong Kong's Hang Seng index declined 0.42 percent while Japan's Nikkei fell 0.45 percent. US Dow Jones Industrial Average ended 0.19 percent.


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