Avoid one-size-fits-all capital approach, says Osfi’s Zelmer

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When the Basel Committee on Banking Supervision published a consultation on its fundamental review of the trading book in May 2012, risk managers reacted with dismay to a suggestion that a reliance on internal models to calculate risk-weighted assets is a problem that needs to be fixed. It proved to be the first of several papers raising concerns about the complexity of bank models, and mooting a return to simple, easy-to-understand measures. 

That sentiment largely drove proposed changes to the

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