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Encouraging the Right Kind of Greed Among Banks: Dylan Ratigan

Jan. 9 (Bloomberg) -- The financial markets need regulation the way a nuclear-power plant needs a cooling agent for its radioactive fuel rods. If safety rules are enforced and the heat of the rods is properly controlled, the result can be clean, abundant energy. But if that cooling process is neglected, there could be a meltdown.

Similarly, capital requirements are the cooling agent of risk-taking in the economy. And just as nuclear fuel will always be reactive, people will always be greedy. We need to enforce rules to balance natural greed with capital requirements so that greed can create productive risk-taking and competition -- not short-term extraction. Here are five possible ways to do that.