THESE are bright days in the euro area. Preliminary figures say that the currency zone's gdp grew by 2.5% last year, the fastest since 2007. But many of the fault-lines in the zone's financial system, as revealed by the financial crisis, remain. A proposal published on January 29th by a group reporting to the European Systemic Risk Board, a prudential supervisor, may mend one of the more troubling flaws.
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