幸存者偏差

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有人做了一个思维实验。雇佣512只猴子,给他们两个按钮,一个买,一个卖,让他们每天随机乱按。每年检查一次猴子们的收益,将赔本的剔出工位,只保留那些盈利的。于是,第二年还有256只猴子,第三年128只,第四年64只,第五年32只。这32只猴子只是“幸存者”。存活下来的往往被视为“传奇”,它们的做法被争先恐后地模仿,但有些只是偶然幸存了下来而已。 #XAU/USD# 

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