The following video is part of our "Motley Fool Conversations" series, in which columnist Morgan Housel discusses topics across the investing world.

Mitt Romney has vowed to repeal the Dodd-Frank financial reform act if elected president. Conventional wisdom says that will be great news for big banks like Citigroup (NYSE:C), Bank of America (NYSE:BAC), and JPMorgan Chase (NYSE:JPM). But that might not be the case. Watch here to find out why.

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