European banks face wave of losses if Greece leaves the euro.

RBS, Commerzbank and Credit Agricole book losses on Greek debt holdings.

RBS, Commerzbank and Credit Agricole book losses on Greek debt holdings.

European leaders promise to consider ways to guarantee bank debt.

European leaders promise to consider ways to guarantee bank debt.

Vickers panel recommends wall between financial firms consumer, investment banks.

Failure to solve regions banking crisis returns to haunt markets.