Bank funding costs and capital structure

If bail-in is credible, risk premia on bank securities should decrease as funding sources junior to and alongside them in the creditor hierarchy increase. Other things equal, we find that when banks have more equity and less subordinated debt they have lower risk premia on both. When banks have more subordinated and less senior unsecured debt, senior unsecured risk premia are lower. For percentage point changes to an average balance sheet, these reductions would offset about two thirds of the higher cost of equity relative to subordinated debt and one third of the spread between subordinated and senior unsecured debt.