After opening with a positive gap of 290 points at 9,298, the index has pared gains on the back of profit-taking at higher levels. The index has now slipped into red and is now down 47 points at 8,961.
Reliance Communications (RCom) has plunged 5.5% to Rs 206.
Jaiprakash Associates, Tata Motors and Grasim have tumbled nearly 5% each to Rs 58, Rs 150 and Rs 981, respectively.
DLF, Ranbaxy and Bharti Airtel have dropped over 4% each to Rs 209, Rs 184 and Rs 599, respectively.
Satyam and Wipro have slipped 4% each to Rs 290 and Rs 232, respectively. Larsen & Toubro has declined 3.5% to Rs 771.
SBI and Reliance Infrastructure are down 3% each at Rs 1,106 and Rs 434, respectively.