As banks try to raise revenue and improve their reputations, they are shaking up their relationships with the "mad men" of Wall Street, testing out new advertising to help refurbish their brands.

Several large banks, including Bank of America (BAC), Fifth Third (FITB) and KeyCorp (KEY), have switched ad agencies over the past year for some or all of their business. Now past the worst of the financial crisis, bankers are taking the time — and spending the money — to try to improve how their customers see them and their besmirched industry.

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