"Most of the time common stocks are subject to irrational and excessive price fluctuations in both directions as the consequence of the ingrained tendency of most people to speculate or gamble... to give way to hope, fear and greed."
"Buy when most people, including experts, are pessimistic, and sell when they are actively optimistic."
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Source: Benjamin Graham (1959). “The Intelligent Investor: A Book of Practical Counsel”
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