The Sensex opened with a negative gap of 128 points 14,518, and soon touched a low of 14,481. The index is now down 100 points at 14,546.
The NSE Nifty is down 25 points at 4,368.
Hindalco, Maruti and Sterlite have slipped over 2% each to Rs 127, Rs 628 and Rs 599, respectively.
Bharti Airtel has shed 1.8% at Rs 794. Mahindra & Mahindra, HDFC and Reliance Communications have declined around 1.5% each to Rs 560, Rs 2,325 and Rs 407, respectively.