Nationwide diversified financial services company, Wells Fargo has a dividend yield of 2.7 percent and a payout ratio of 0.05.

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Headquartered in Midland, Michigan, Chemical Financial is a diversified financial services company, which operates through a single subsidiary bank, Chemical Bank.

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Citigroup Inc. (C), a diversified financial services holding company, provides a range of financial products and services to consumers, corporations, governments, and institutions worldwide.

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"U.S. residential housing exposures are manageable given AIG's size, financial strength and diversified global businesses, " the company said.

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In an article in the Wall Street Journal in April last year Chris Zook, a colleague of Mr Rigby's at Bain, drew a comparison between Amazon, a diversified Internet retailer, and American Express, a company that had stuck to its core business of providing financial services.

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Mr Merloni believes it would be fatal to be distracted from his firm's focus on white goods. (A family holding company oversees unrelated investments, notably in energy.) Fiat diversified way beyond cars, spanning tractors to financial services.

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