Last month, ill-informed speculation grew to a crescendo that Antony Jenkins, the newish chief executive of Barclays, who spent his career on the retail side of the bank, would take the axe to the investment banking division. After all, UBS’s shares had been re-rated after the bank announced a wide-scale deleveraging of the investment bank, particularly those parts of the FICC division that had large amounts of capital tied up by counterparty risk exposure in long-dated derivatives.