BPCL's stock dipped 4.35 per cent to Rs 730.05 at the BSE.
On the NSE, it was down 4.61 per cent to Rs 730.
BPCL had yesterday reported 50 per cent drop in net profit for September quarter as refining margin dipped on slumping international oil prices.
Net profit in the July-September period at Rs 464.20 crore, or Rs 6.42 per share, was 50 per cent lower than Rs 931.13 crore, or Rs 12.88 a share, in the same period a year ago, the company had said in a filing to the stock exchanges.