The roller-coaster ride in the market continues as the index has bounced back into positive territory in late noon trades owing to fresh buying in select heavyweights, banking and other old economy counters. The Sensex is now up 15 points at 6,550. The Nifty also has reverted into the green at 2,058 - up three points.Infosys has edged higher by a per cent (Rs 17) to Rs 2,046. While Reliance is up a per cent (Rs 4) at Rs 534, Wipro also is trading in the green at Rs 693 - up Rs 6.HDFC Bank has gained 1.43% (Rs 8) to Rs 569, and ICICI Bank is up a per cent (Rs 2) at Rs 362. SBI, however, is still trading with losses at Rs 636 - down Rs 6.ACC has moved up 1.42% (Rs 5) to Rs 371.HDFC has shot up nearly 3% (Rs 23) to Rs 816, and Tata Power is up a per cent (Rs 3) at Rs 393. Bharti (down Rs 6 or 2.70% to Rs 215), however, continues to trade at lower levels.While ITC is still subdued at Rs 1,322 (down Rs 9), HLL is trading weaker at Rs 160 - down Rs 2.