The country's second largest PSU lender by assets had a net profit of Rs 1,205 crore in the July-September quarter of 2011-12 fiscal.
"The results are not as per our expectation," PNB Chairman K R Kamath told reporters here.
The net Non-performing Assets (NPAs) or bad loans as a percentage of total assets rose to 2.69 per cent in the July-September quarter, from 0.84 per cent during the same period a year ago.
"It is a reflection of what is happening in the economy. It is difficult to say whether the worst is over. It all depends on how economy behaves in next 3-6 months," he said.
In absolute term, the net NPA of the Delhi-based bank jumped to Rs 7,883.43 crore in the July-September quarter, from Rs 2,088.51 crore in the year ago period.
During the quarter the bank provisioning towards NPAs stood at Rs 1,140 crore, a 257 per cent jump over Rs 319 crore provisioned in the September quarter of last fiscal.
More From This Section
"Higher provisioning is on account of higher NPA slippage. In some way it is a reflection of what is happening in the economy," Kamath said.
Shares of Punjab National Bank slipped sharply on the earnings as NPAs rose. PNB's shares ended at Rs 748 on the BSE, down 7.01 per cent from previous close.
Many PSU lenders have exposure to debt-laden firms like Kingfisher Airlines, Deccan Chronicle, the beleaguered state electricity boards and power and infrastructure projects.
"Whereever investments are not in a position to generate income, the government has to work to reduce bottlenecks else banks will have to take a hit in their books," Kamath said.