The Sensex opened with a negative gap of 170 points at 9,160, and is now down 229 points at 9,100.
Bharti Airtel has plunged over 4% to Rs 620.
HDFC Bank and Reliance Communications have shed 3.3% each at Rs 909 and Rs 179, respectively.
DLF, HDFC, Maruti and Mahindra & Mahindra have dropped over 3% each to Rs 189, Rs 1,498, Rs 560 and Rs 300, respectively.
All index stocks are in negative territory with losses of 1% each.
