US banks have been given government assurances they will be allowed to raise less than the $74.6bn in equity mandated by stress tests if earnings over the next six months outstrip regulators’ forecasts, bankers said.

The agreement, which was not mentioned when the government revealed the results on Thursday, means some banks may not have to raise as much equity through share issues and asset sales as the market is expecting. It could also increase the incentive for banks to book profits in the next two quarters.