Continuing yesterday's weakness, the 30-share index moved further down by 30.38 points, or 0.11 per cent, to 26,566.73, with metal, FMCG, PSU, oil & gas and banking sector stocks leading the fall. The gauge had lost 29.21 points in the previous session.
Also, the National Stock Exchange index Nifty shed 11.25 points, or 0.14 per cent, to 7,947.65 in early trade.
Brokers said besides weak trend on other Asian bourses tracking overnight fall in the US markets, selective selling by cautious funds and retail investors ahead of RBI's policy review later in the day influenced sentiments.
The US Dow Jones Industrial Average ended 0.25 per cent lower in yesterday's trade.