The state-run firm's scrip lost 2.4 per cent to Rs 143.90 at the BSE.
On the NSE, it slipped 2.47 per cent to Rs 144.
PGCIL had yesterday reported a marginal decline in net profit for the quarter ended September at Rs 1,201.27 crore due to higher finance cost.
The company's net profit during the corresponding quarter last fiscal stood at Rs 1,239.2 crore, PGCIL had said in a filing to the BSE.
Its total income during the July-September quarter increased five per cent to Rs 4,309.26 crore from Rs 4,104.43 crore a year-ago.