Unverified50% confidenceFactExact time
安全边际原则由本杰明·格雷厄姆在1949年《聪明的投资者》中提出
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50%
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Long-term
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7/14/2026
First Seen
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伯克希尔3970亿美元现金：巴菲特在警示什么？
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