It fell 5.89 per cent to Rs 1,325 on the NSE.
It was the biggest laggard among the Sensex and Nifty firms.
The company's market capitalisation (mcap) eroded Rs 8,407.73 crore to Rs 1,29,011.81 crore.
In the broader equity market, the 30-share
For the reporting quarter, its overall revenue from operations declined 4.6 per cent to Rs 13,101 crore from Rs 13,734 crore in the year-ago period.
However, it was a sharp decline in operating profits, with margins narrowing to 5.4 per cent from 12 per cent in the year-ago period, which seems to have impacted the headline profit.