European banks' run of soaring profits and record shareholder payouts faces a big test this week when investors assess how fast the boost from higher interest rates is fading, and if a weak economic outlook will make life tougher. The STOXX Europe 600 banks index hit its highest since mid-2018 this month, propelled by a recovery in profitability thanks to higher rates, record shareholder payouts and little provisioning for bad loans. Retail-focused lenders which earn most of their money from the difference between loan income and deposit costs have benefited most from rising rates, but ...