Shares of Tata Steel were among the top Sensex losers amid a market rally in early trade today. The Tata Steel stock was trading 0.64 per cent lower at Rs 100.90 against the previous close of Rs 101.55 on BSE. Meanwhile, Sensex zoomed 550 points to 60,509 and Nifty gained 169 points to 17,955 in early trade.