The stock tanked 5.45 per cent to settle at Rs 374.45 on BSE. During the day, it dropped 9.85 per cent to Rs 357 -- its 52-week low.
On NSE, shares of the company tumbled 5.14 per cent to end at Rs 375.45.
The stock was the worst hit among the blue-chips on both Sensex and Nifty.
The company's market valuation fell by Rs 6,236.24 crore to Rs 1,08,116.76 crore.
Tata Motors yesterday reported a net profit of Rs 1,215 crore for the December quarter, up over 11-fold from Rs 111.6 crore a year ago.
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