When Barclays, Deutsche Bank and Credit Suisse all appointed new chief executives in 2015 there was little doubt who had the most difficult job. John Cryan clearly faced a Herculean task turning around Deutsche Bank.

Yet it is Cryan who now appears to be the most secure. In contrast, thanks largely to self-inflicted wounds, there are question marks over both Jes Staley at Barclays and Tidjane Thiam at Credit Suisse.