Following the 2008 financial crisis, loan loss provisioning was changed to reflect ‘expected’ losses rather than ‘incurred’ losses. This made the impairment reserves of banks more responsive to changes in credit quality, but it also introduced a distorting day 2 effect. Under US GAAP most expected loan losses are charged to profit up front. This ‘prudent’ approach may be liked by banking regulators, but it can produce performance metrics that are confusing for investors. The disto...