We propose a simple model of the sovereign-bank diabolic loop, and establish four results. First, the diabolic loop can be avoided by restricting banks' domestic sovereign exposures relative to their equity. Second, equity requirements can be lowered if banks only hold senior domestic sovereign...

The euro area financial system took excessive risks during the global credit boom, which in some countries led to an unsustainable increase in credit, higher asset prices and housing booms. This process helped to fuel large imbalances within the euro area. Banks played a key role in channelling...