Investors also focussed on oil prices and the West Asian crisis and reacted to the September quarterly earnings of heavyweights such as Idea Cellular, L&T and Coal India.
The 30-share index resumed positive before slipping to 33,176.67, down 137.89 points, or 0.41 per cent, at 1122 hours.
Major losers were L&T, Coal India and Cipla, sliding up to 2.95 per cent.
Foreign portfolio investors (FPIs) sold shares worth a net Rs 529.22 crore last Friday, as per provisional data released by stock exchanges. Domestic institutional investors (DIIs) bought shares worth a net Rs 1,920.87 crore.
Overseas, Asian markets saw a mixed trend. US stocks closed mostly lower last Friday as they snapped multi-week winning streak while some of the largest technology stocks pulled back.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)