But Peter Wuffli, the bank's chief executive, argues that diversification matters most and can improve stability over time.

但是这家银行的首席执行官Peter Wuffli认为多样化经营最重要，而且从长远来看能够提高稳定性。

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In July, UBS (nyse: UBS - news - people ) Chief Executive Peter Wuffli resigned abruptly.

FORBES: Street Quakes As Another Chief Falls

Stanley O'Neal of Merrill Lynch, Charles Prince of Citigroup, and Peter Wuffli at UBS have all been pushed out over their firms' subprime-related losses.

FORBES: Magazine Article

In July, Peter Wuffli stepped down abruptly as chief executive of UBS months after that firm took big losses from subprime mortgage holdings and shut down its Dillon Read hedge fund unit.

FORBES: Magazine Article