“There is a close logical connection between the concept of a safety margin and the principle of diversification.”

We define a bargain issue as one which, on the basis of facts established by analysis, appears to be worth considerably more that it is selling for.

The defensive (or passive) investor will place chief emphasis on the avoidance of serious mistakes or losses. His second aim will be freedom from effort, annoyance, and the need for making frequent decisions.

Even the most conservative must realize that the recent transformation of surplus from an individual to a national disaster implies a scathing indictment of our capitalist system as it has now developed.

A stock is not just a ticker symbol or an electronic blip; it is an ownership interest in an actual business, with an underlying value that does not depend on its share price.

Do not let anyone else run your business

Never buy a stock because it has gone up or sell one because it has gone down.

It is absurd to think that the general public can ever make money out of market forecasts.

It is a fact worth pondering that four centuries ago the evil of “an abundance or surplus” arose from its being kept off the market, while today the evil of surplus lies in its being thrown upon the market.

The stock market resembles a huge laundry in which institutions take in large blocks of each others washing … without rhyme or reason.

To establish the right price for a stock, the market must have adequate information, but it by no means follows that is the market has this information it will thereupon establish the right price.

The money cost of the reservoir plan literally fades into insignificance when it is compared with the financial burden which the great depression imposed on the nation.

A great company is not a great investment if you pay too much for the stock.

An investor calculates what a stock is worth, based on the value of its businesses.

The only thing you should do with pro forma earnings is ignore them.

Investing is most intelligent when it is most businesslike.

Intelligent investment is more a matter of mental approach than it is of technique. A sound mental approach toward stock fluctuations is the touchstone of all successful investment under present-day conditions.

The value of any investment is, and always must be, a function of the price you pay for it.

Whatever men attempt, they seem driven to overdo. When hopes are soaring, I always repeat to myself that two and two still make four.

Before you invest, you must ensure that you have realistically assessed your probability of being right and how you will react to the consequences of being wrong.

The intelligent investor gets interested in big growth stocks not when they are at their most popular – but when something goes wrong.

The ideal form of common stock analysis leads to a valuation of the issue which can be compared with the current price to determine whether or not the security is an attractive purchase.

The intelligent investor should recognize that market panics can create great prices for good companies and good prices for great companies.

Price fluctuations have only one significant meaning for the true investor. They provide him with an opportunity to buy wisely when prices fall sharply and to sell wisely when they advance a great deal.

Successful investing professionals are disciplined and consistent and they think a great deal about what they do and how they do it.