GAIL India's scrip tumbled 6.58 per cent to Rs 392.30 at the BSE.
The stock was the top loser among the 30-Sensex constituents.
On the NSE, it was down 6.79 per cent to Rs 391.
GAIL India Ltd had on Friday posted a massive 64 per cent drop in its December quarter net profit as it could not sell imported gas contracted at higher price.
Net profit in October-December at Rs 604.08 crore was 64 per cent lower compared to Rs 1,679.4 crore in the same period a year ago, the company had said in a statement.