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It is the bell curve to which investors are referring when they talk about a "nine standard deviation event " .

当投资者们谈及所谓 “九个标准差事件 ”时，他们实际上在说钟形曲线。

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"We were seeing things that were 25-standard deviation moves, several days in a row, " said Goldman Sachs' chief financial officer .

高盛首席财务官当时曾表示：“我们注意到连续几天出现了 25 倍标准方差事件。”

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