The 30-share BSE barometer started the day on a positive note after Infosys shares surged after posting 21.4 per cent rise in net profit for the third quarter ended December 31 and raising its revenue growth forecast for the next fiscal. Its peers like TCS, Wipro and HCL Tech also saw smart gains.
After hitting a one-week high of 20,971.23, up by almost 258 points, the Sensex started losing momentum in late afternoon deals on emergence of selling amid December export growth easing to a six-month low of 3.49 per cent.
Buying in IT, FMCG and oil & gas helped the market while losses in banking, capital goods, realty and metal weighed.
On a weekly basis, the Sensex fell by 93 points and logged the second straight drop.
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The 50-issue NSE CNX Nifty also moved in a wide range of nearly 100 points before finishing up by a mere 3.10 points, or 0.05 per cent, at 6,171.45 today. Also, SX40 index of MCX-SX ended 56.51 points up at 12,423.34.
Second-line stocks continued to attract profit-booking by retail investors. The BSE Midcap and Smallcap indices closed down by 0.94 per cent and 0.62 per cent respectively.
Globally, Asian markets showed narrowly mixed trend as data showed China's trade surplus narrowed and investors awaited a report on US payrolls.