Benjamin Graham Quotes
Never buy a stock because it has gone up or sell one because it has gone down.
Graham, Benjamin. The Intelligent Investor. 4th Rev. ed., Harper & Row, 1973, p. 32.
To be a good investor, one may not need exceptional intellect, but he/she does need to be able to learn a lot rapidly, understand and mentally have a feel for numbers and quantitative data which Buffet assumed in addition to the things he enumerated.
He distressed most of the other stock brokers on Wall Street by pointing out that if brokers were so smart, why would they not want to buy the stock for themselves rather than sell it to you. Therefore, he generally concluded that the best stocks are bought by the brokers and bankers for their own accounts, and the lesser quality shares are sold to the public.
Benjamin Graham was a British-born American economist, professor and investor. He is widely known as the "father of value investing", and wrote two of the founding texts in neoclassical investing: Security Analysis (1934) with David Dodd, and The Intelligent Investor (1949). His investment philosophy stressed investor psychology, minimal debt, buy-and-hold investing, fundamental analysis, concentrated diversification, buying within the margin of safety, activist investing, and contrarian mindsets.