When banks get too big to fail, it's time to break them up, writes Nouriel Roubini. "The problem of banks being too big to fail is even bigger now than it was before the crisis," he notes. "The true solution to the too-big-to-fail problem requires ... radical choices." For starters, he suggests, governments should erect a financial firewall between commercial and investment banking groups, so that risk-taking institutions can be allowed to go under without threatening deposit-taking banks.
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