"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."
"The investor has a right to expect good results to flow from a consistent and courageous application of the principle of buying after the market has declined substantially and selling after it has had a spectacular rise. But he cannot expect to reduce this principle to a simple and foolproof formula, with profits guaranteed and no anxious periods."
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Source: Benjamin Graham (1962). “Security Analysis: Principles and Technique”
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