After plummeting 6.53 per cent to Rs 2,287 in intra-day trade, the stock ended at Rs 2,321.15, down 5.14 per cent, on BSE. It was the worst performer in the 30-share Sensex team.
On NSE, shares of the company went down 4.85 per cent to close at Rs 2,322.10.
The company's market valuation saw an erosion of Rs 24,797.12 crore to Rs 4,57,365.88 crore.
On the volume front, 3.02 lakh shares of the company were traded on BSE and over 35 lakh on NSE during the day.
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"Based on data at the end of August 2016, the company has characterised customer outlook as one marked by abundant caution, with some holding back of discretionary spending - particularly in the BFSI vertical in the US, resulting in a sequential loss of momentum," TCS said.
Weakness was also seen in other IT counters, with Infosys falling 1.62 per cent lower, Wipro (1.77 per cent), HCL Tech (1.70 per cent) and Tech Mahindra (2.61 per cent).
The m-cap of Infosys was shaved off by Rs 3,927.11 crore while that of Wipro slipped Rs 2,074.65 crore, HCL Tech (Rs 1,870.93 crore) and Tech Mahindra (Rs 1,170.33 crore).
Taken together, these five IT firms lost Rs 33,840.14 crore in market valuation.
The BSE IT index, too, was quoting down 2.49 per cent at 10,164.96.
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