The prominent Sensex gainers were: Tata Steel, up 2.89 percent at Rs.284.70; Bajaj Auto, up 1.81 percent at Rs.1,840; Tata Power, up 1.15 percent at Rs.83.25; Infosys, up 1.08 percent at Rs.2,447.60; and Hero MotoCorp, up 1.02 percent at Rs.1,640.30.