The Sensex is swinging in and out of the positive zone and is now almost flat at 13,178.ITC has surged 2% to Rs 159. Tata Motors has rallied 1.6% to Rs 715.Reliance Energy, HDFC and Gujarat Ambuja are up over 1% each to Rs 520, Rs 1,575 and Rs 110, respectively.SBI has slipped 1.4% to Rs 975. Dr.Reddy's, HDFC Bank and ICICI Bank are down 1% each at Rs 721, Rs 962 and Rs 846, respectively.