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With banking stocks caught in a downward spiral, there's a wonderful way for bank CEOs to both demonstrate confidence in the institutions they lead and one-up their rivals: Just buy a lot of stock in your own company! Following the news earlier today that Bank of America CEO Ken Lewis plunked down $1.2 million for 200,000 shares of BoA, JPMorgan's Jamie Dimon has now officially upstaged him by purchasing 500,000 shares in his bank for $11 million. Your turn, Vikram! [Clusterstock]