Continuing with its early weakness, benchmark Sensex reeled in the red amid selling pressure in FMCG and banking and lower Asian cues as investors awaited outcome of central bank policy meetings in the US and Japan this week.
However, metal, realty and power segments saw some buying interest.
The Sensex resumed lower and was quoting at 25,663.15 at 1206 hours, a loss of 15.78 points, or 0.06 per cent from its last close.
However, the NSE Nifty was trading flat, marginally higher by 2.20 points, or 0.03 per cent, at 7,857.25.
Adani Ports lost 1.60 per cent, ICICI 1.46 per cent,Bajaj Auto 1.06 per cent and Hero MotoCorp 1.03 per cent.
Tata Steel gained 2.06 per cent, BHEL 2.03 per cent and M&M 1.29 per cent.
Meanwhile, foreign portfolio investors (FPIs) net bought shares of Rs 222.34 crore yesterday, as per provisional data.
Asian markets were trading lower after oil prices eased.US stocks fell yesterday as weaker oil prices weighed on energy shares.