Benjamin Graham

Investment Style
Morningstar's online Interactive Classroom carries this anecdote about the results of Ben Graham's investing style:

"In 1984, [Warren] Buffet returned to Columbia to give a speech commemorating the fiftieth anniversary of the publication of "Security Analysis". During that speech, he presented his own investment record as well as those of Ruane, Knapp, and Schloss [other successful investment managers who were students of Graham at Columbia]. In short, each of these men posted investment results that blew away the returns of the overall market. Buffett noted that each of the portfolios varied greatly in the number and type of stocks, but what did not vary was the managers' adherence to Graham's investment principles."

It is difficult to encapsulate Benjamin Graham's investing style in a few sentences or paragraphs. Readers are strongly urged to refer to his "The Intelligent Investor" to obtain a more thorough understanding of his investment principles.

In brief, the essence of Graham's value investing is that any investment should be worth substantially more than an investor has to pay for it. He believed in thorough analysis, which we would call fundamental analysis. He sought out companies with strong balance sheets, or those with little debt, above-average profit margins, and ample cash flow.

He coined the phrase "margin of safety" to explain his common-sense formula that seeks out undervalued companies whose stock prices are temporarily down, but whose fundamentals, for the long run, are sound. The margin of safety on any investment is the difference between its purchase price and its intrinsic value. The larger this difference is (purchase price below intrinsic), the more attractive the investment - both from a safety and return perspective - becomes. The investment community commonly refers to these circumstances as low value multiple stocks (P/E, P/B, P/S).

Graham also believed that market valuations (stock prices) are often wrong. He used his famous "Mr. Market" parable to highlight a simple truth: stock prices will fluctuate substantially in value. His philosophy was that this feature of the market offers smart investors "an opportunity to buy wisely when prices fall sharply and to sell wisely when they advance a great deal."

Publications
-> "Security Analysis" (1934) by Benjamin Graham and David Dodd
-> "The Intelligent Investor" by Benjamin Graham (1949)
-> "Benjamin Graham: The Memoirs Of The Dean Of Wall Street" by Benjamin Graham and Seymour Chatman (editor) (1996)
-> "Benjamin Graham On Value Investing: Lessons From The Dean Of Wall Street" by Janet Lowe (1999)