The 30-share index resumed slightly lower at 20,604.27 and fell further to 20,520.32 before quoting at 20,532.53 at 1030 hours. (Agencies)
It showed a loss of 72.55 points, or 0.35 per cent, from its last close. The NSE 50-share index Nifty also moved down by 0.34 percent to 6,094.80 at 1030 hours.
Major losers were - ITC (1.50 pct), Tata Steel (1.07 pct), Tata Motors (0.96 pct), TCS (0.93 pct), Dr Reddy's Lab (0.91 pct) and HDFC (0.94 pct).
The market may remain volatile this week as traders roll over positions in the futures & options (F&O) segment from the near-month November 2013 series to December 2013 series.
The near-month November 2013 derivatives contract will expire on coming Thursday.
Most Asian stocks declined in their early trade on profit taking after recent gains.
Key benchmark indices in Indonesia, Singapore, Japan, and South Korea fell by 0.08 to 0.76 percent while indices in China, Taiwan and Hong Kong rose 0.01 to 0.68 percent.
Meanwhile, foreign institutional investors (FIIs) bought shares worth a net Rs 837.80 crore on Monday, as per the provisional data from stock exchanges.
The 30-share index resumed slightly lower at 20,604.27 and fell further to 20,520.32 before quoting at 20,532.53 at 1030 hours.