Further rattling financials, the Fed closed the book on Florida savings and loan BankUnited.

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On the flipside of things, BankUnited (BKU) is down almost 12% after appearing to reject overtures from potential acquirers.

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Some of those deals, like OneWest Bank and BankUnited, have been home runs.

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This led Advisory Research to buy a diverse group of regional banks, from Japan (Bank of Yokohama) to America (BankUnited).

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Joining the aforementioned group of U.S. deals in the global top 10 were BankUnited and private equity firm Apollo Global Management, run by billionaires Leon Black, Marc Rowan and Joshua Harris.

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