The Sensex, which tumbled sharply towards the fag-end yesterday, has commenced weak in the opening bell today. It has shed 37 points to 6,571 following early selling pressure in tech, banking and select heavyweights. The Nifty has lost nine points to 2,060.Infosys has shed 1.77% (Rs 39) to Rs 2,145. While Wipro has lost a per cent (Rs 7) to Rs 700, Satyam is also weak at Rs 405 - down Rs 2.SBI is down Rs 4 at Rs 660. HDFC Bank is down a per cent (Rs 4) at Rs 556, while ICICI Bank has lost 1.44% (Rs 5) to Rs 370.ITC has resumed weak with a loss of Rs 5 at Rs 1,300. Reliance and HLL are up a rupee each at Rs 536 and Rs 145, respectively.Bharti is down 1.33% (Rs 3) at Rs 212 and Tata Power has dipped 1.49% (Rs 6) to Rs 411.Auto, cement and pharma counters, too, have eased in early trades.