Benjamin Graham
The Father of Value Investing
Benjamin Graham taught investors to think like owners, not gamblers, pioneering value investing and margin‑of‑safety discipline. Author of “Security Analysis” and “The Intelligent Investor,” he turned balance sheets into maps of risk and reward. His students—from Warren Buffett onward—proved patience, not prediction, compounds durable advantage in volatile markets over time.
- 19 min listen
- Father of value investing
- Margin of safety
- The Intelligent Investor
Benjamin Graham’s full 19 min audio biography, The Father of Value Investing, is available on Lyfestori for iOS. Listen to a free preview below.
A life in brief
The shape of a life.
Benjamin Graham's father died when he was nine, and his mother took in boarders to keep the family going. He was salutatorian at Columbia and turned down teaching offers from three departments to take a job as a Wall Street runner at twenty. He noticed that a stock's price often has little to do with what the company is worth. Then the 1929 crash cost him dearly and taught him the rest — buy with a margin of safety, and treat your own emotions as the enemy.
- 1894
Born in London
Born Benjamin Grossbaum on 8 May. The family emigrates to New York before he is two, settling on the Lower East Side, where his father Maurice works in the import business. When Benjamin is nine his father dies suddenly; his mother Dora takes in boarders and works whatever jobs she can to support three sons. The insecurity shapes his approach to money for life.
- 1911
Columbia on a scholarship
He excels at languages and mathematics — he speaks French, German and Latin fluently — and his economics professors give him the rigorous analytical training that will shape everything after. He also changes his name from Grossbaum to Graham, partly to avoid the anti-Semitism common in American business at the time.
- 1914
Salutatorian, then a runner
He graduates with the second-highest grades in his class, and three departments — English, philosophy and mathematics — offer him teaching posts. He turns down all three and takes a job as a runner at Newburger, Henderson & Loeb, on a modest salary, at twenty.
- 1920
Out-earning his professors
Promoted repeatedly for his skill at analysing investments, he is making more money than many of the Columbia professors who taught him. He has begun to notice that stock prices often bear little relation to the value of the companies behind them.
- 1926
Graham-Newman
He starts his own investment partnership with Jerome Newman. While others rely on tips, rumours and market trends, he reads financial statements — looking for companies below book value, with strong balance sheets, steady earnings and competent management.
- 1929
The crash
He loses a significant amount of money when the market collapses. Unlike many, he treats it as a lesson rather than a reason to quit, and takes from it the margin of safety, the case for diversification, a lasting caution about debt, and the conviction that emotion is the enemy of good investing.
- 1934
Security Analysis
Written with his Columbia colleague David Dodd. Not tips or predictions but a systematic method: how to read financial statements, evaluate management, and determine what a security is actually worth. It becomes required reading at business schools and investment firms.
- 1949
The Intelligent Investor
Written for ordinary people rather than professionals. It separates investing from speculating, distinguishes defensive from enterprising investors, recommends keeping 25% to 75% in stocks with the rest in bonds, and introduces Mr. Market. It has stayed in print for more than seventy years.
- 1976
Death
He dies on 21 September, aged eighty-two, having changed stock analysis from tips, rumours and speculation into a profession with methods that could be taught.
Major achievements
What Benjamin Graham gave the world.
- 01
Value investing
The idea that a company has an intrinsic value independent of its share price, and that the work is to buy when the price sits well below it — judged from the accounts, not from trends or tips.
- 02
The margin of safety
Only buy when a stock trades significantly below its true value, so the gap cushions you against losses. The most durable thing he took out of 1929.
- 03
Security Analysis
The 1934 book with David Dodd that drew the line between investment and speculation and showed that securities could be analysed systematically. It set the standard the profession still works to.
- 04
The Intelligent Investor
The 1949 book written in clear language for people investing their own money. A bestseller in print for over seventy years; Warren Buffett has called it the best book on investing ever written.
- 05
Mr. Market
The imaginary partner who turns up every day offering to buy or sell at prices set by his mood — high when optimistic, low when pessimistic. The intelligent investor exploits the mood swings instead of catching them.
- 06
The students
His Columbia classes were among the school's most popular. Warren Buffett, Walter Schloss, Irving Kahn and William Ruane all learned his methods and spent careers proving them.
Turning points
The moments that decided it.
- Age nine
The boarders
His father died suddenly and the family's modest comfort collapsed. His mother took in boarders and worked various jobs to keep three boys fed. Graham's conservatism about money — the caution about debt, the insistence on a cushion — began in that house, long before Wall Street.
- 1914
Turning down three departments
Columbia offered the salutatorian teaching posts in English, philosophy and mathematics. He turned down all three and went to Wall Street as a runner at twenty, on a modest wage. He got the teaching in the end anyway — part-time at Columbia for many years — but the career was built in the market first.
- 1929–1934
The crash as curriculum
He lost a significant amount of money, like everyone. Unlike most, he wrote down what it taught him: the margin of safety, diversification, caution about debt, and the sight of fear and greed driving investors to buy at the top and sell at the bottom. Through the 1930s, while others were still recovering, he documented a method that could be taught and replicated. That work became Security Analysis.
- Early 1950s
Buffett
Warren Buffett took his classes, was convinced, and applied to Graham-Newman as soon as he graduated. Graham turned him down. Buffett kept at it until Graham hired him as an analyst, and has credited his mentor with teaching him everything he knows about investing ever since.
- 1950s–1960s
Taking himself out of the loop
Late in his career he moved away from picking individual stocks toward mechanical strategies — low price-to-earnings ratios and high dividend yields, or companies trading below their net working capital. The point was to remove emotion and subjective judgement from the process, including his own.
What you’ll take away
Lessons that outlast the headlines.
- 01
Leave room to be wrong
The margin of safety is not really about finding bargains. It is about buying far enough below value that your analysis can be wrong and you still survive. He learned it by losing money in 1929.
- 02
Price is not value
The observation that started everything was available to anyone on the floor: what a stock costs and what the company is worth are two different numbers, and they drift apart constantly. He was the one who acted on it systematically.
- 03
Your emotions are the counterparty
He watched fear and greed make people buy at the top and sell at the bottom, and invented Mr. Market to explain it. Late in life he moved to mechanical rules — to take the judgement out of his own hands too.
Did you know
Fun facts.
- 01
Did you know that Benjamin Graham, the 'father of value investing', taught Warren Buffett at Columbia Business School, and Buffett was the only student to ever get an A+ in his class?
- 02
Did you know that Graham lost nearly all of his personal wealth during the 1929 stock market crash, an experience that led him to develop his famous safe investing principles?
- 03
Did you know that alongside being a brilliant investor, Graham was deeply interested in literature and translated a Uruguayan novel into English in his spare time?
Questions
Good to know.
Buying stocks that trade for less than their true worth, judged by careful analysis of a company's finances rather than by market trends or tips. Graham looked for companies trading below book value — the share price lower than assets minus debts — with strong balance sheets, steady earnings and competent management.
Graham's rule that you should only buy when a stock trades significantly below its true value, so that the gap provides a cushion against losses and against your own errors. It was one of the lessons he drew from losing a significant amount of money in the 1929 crash.
An imaginary business partner Graham invented in The Intelligent Investor to explain price swings. Mr. Market shows up every day offering to buy or sell shares — sometimes optimistic and quoting high prices, sometimes pessimistic and quoting low ones. The intelligent investor takes advantage of his mood swings rather than being influenced by them.
Yes. Buffett took his classes at Columbia in the early 1950s and applied to the Graham-Newman Partnership immediately after graduating. Graham initially turned him down, but Buffett eventually convinced him and was hired as an analyst. Buffett has consistently credited Graham with teaching him everything he knows about investing.
Security Analysis (1934), written with David Dodd, is the professional's text — how to read financial statements and value securities systematically. The Intelligent Investor (1949) was written for ordinary people in plain, accessible language, and is the more approachable of the two.
19 min · one sitting