After opening the day on a weak note, the stock further tumbled 9.85 per cent to Rs 299 on BSE.
At NSE, shares of the company slumped 9.85 per cent to Rs 298.55.
The private sector lender yesterday reported a net profit of Rs 1,002.73 crore in the second quarter, up about 25 per cent year-on-year.
The bank's net profit was at Rs 801.54 crore in the same quarter a year ago.
In a regulatory filing, it said the net interest income increased to Rs 1,885.1 crore in the July-September quarter of the fiscal.
Net NPAs also rose to 1.04 per cent of assets as of September 2017-end as compared to 0.29 per cent in the comparable period of 2016-17.