After plunging 15.57 per cent to Rs 29.55 -- its 52-week low -- in intra-day trade on BSE, shares of the company finally ended at Rs 31.05, down 11.29 per cent.
At NSE, the stock plummeted 11.42 per cent to Rs 31.
The company's market valuation fell by Rs 487.24 crore to Rs 3,835.76 crore.
In terms of volume, 19.35 lakh shares of the company changed hands at BSE and over one crore shares were traded on NSE during the day.
For the half-year period ended September 30, net loss stood at Rs 536.07 crore as against a net profit of Rs 26.21 crore a year ago.
Total income for July-September increased to Rs 6,769.94 crore, from Rs 6,440.77 crore in the same period of the previous fiscal.