The stock went down 5.14 per cent to settle at Rs 1,018 on BSE. Intra-day, it tumbled 5.87 per cent to Rs 1,010.10.
The bellwether was the top loser on the 30-share Sensex, which dragged down the benchmark.
On NSE, shares of the company slumped 5.25 per cent to Rs 1,016.85.
Owing to the decline in the stock, the company's market valuation came down by Rs 17,779.3 crore to Rs 3,29,751.70 crore.
Volume-wise, 5.77 lakh shares of the company changed hands on BSE and over 62 lakh on NSE during the day.
In the broader market, the Sensex ended at 24,188.37, down 266.67 points, or 1.09 per cent.