Federal regulators on 21 June raised doubts about how some of the biggest banks in the country would try to wind themselves down in the event of a failure. 

The Federal Reserve and the Federal Deposit Insurance Corporation said wind-down plans from JPMorgan Chase, Bank of America, Goldman Sachs and Citigroup all had weaknesses, raising questions about their feasibility. The plans, known as living wills, detail how they would wind down operations and repay creditors if they went bust.