Shares of TCS lost 1.18 per cent and Infosys fell by 0.51 per cent on the BSE.
The BSE IT index ended the day at 9,226.67 , down 0.17 per cent.
Analysts said that IT stocks fell after Cognizant forecast 2014 revenue guidance below market expectations, raising concerns about the sector's growth prospects.
Cognizant yesterday reported a 16.3 per cent rise in net profit for the fourth quarter ended December 31 but forecast at least 16.5 per cent revenue growth in 2014, which is slower than this year's rate.
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Revenues for the reported quarter rose 20.4 per cent to USD 2.36 billion in October-December 2013 from USD 1.95 billion in the same quarter of 2012. It follows January-December fiscal.
For the entire 2013 fiscal, the Nasdaq-listed firm's revenues rose by 21 per cent to USD 8.843 billion, while net profit was up by 17.1 per cent to USD 1.23 billion.