Mumbai, April 6 : HDFC Bank on Wednesday slipped 3.51 pc to close at Rs 1550.80, a major loser in 30 scrips of BSE. Other losers were HDFC by 3.26 pc to Rs 2536.50, HCL Technology by 2.07 pc to Rs 1170.80, Tech Mahindra by 1.97 pc to Rs 1459.60 and Infosys by 1.75 pc to Rs 1828.45. The gainers were NTPC by 2.61 pc to Rs 153.05, Tata Steel by 1.94 pc to Rs 1371, Powergrid by 1.52 pc to Rs 236.60 and Bharti Airtel by 1.17 pc to Rs 775.20. NV RKM