Bumper third quarter profits at Goldman Sachs and another loss for Citigroup on Thursday highlighted the gap between the financial resilience of Wall Street and the woes of Main Street, fresh evidence that two Americas are emerging from the crisis.

The diverging performance of investment banks such as Goldman and the retail banking operations of the banks such as Citi is problematic for an Obama administration that wants a strong Wall Street but is also under pressure to tackle the plight of ordinary people.