"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."
"Successful investment may become substantially a matter of techniques and criteria that are learnable, rather than the product of unique and incommunicable mental powers."
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Source: Benjamin Graham (1959). “The Intelligent Investor: A Book of Practical Counsel”
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