The Intelligent Investor by Benjamin Graham

This is my first article in which I talk about recommended bibliography for long-term investors and I’m glad to do it with this investment classic whose ideas are actually more important than ever, “The Intelligent Investor” by Benjamin Graham. This book, also known as “the Value Investing Bible”, is an unavoidable reference for people interested in it and, generally, in long-term investing. According to Warren Buffett, this is “By far the best book on investing ever written”.
If I had to define The Intelligent Investor in only one word, this word would be sensibility. Through the book we can see how Benjamin Graham explains, in a completely coherent and sensible manner, the way he understood investing and long and short-tem market behavior. Another important factor is its simplicity. This book is valid not only to university graduates, but also to people without large knowledge about the stock market who want to look for long-term profitability to their savings
The book differentiates between investors (long-term investors who buy parts of companies) and speculators (who are looking for short-term profits without taking into account the businesses they are buying). I recommend this book mainly to long-term investors, not to traders, which could think it’s useless for short-term speculation.
The book has many examples that illustrate its theories, as well as huge inefficient that the market could has. One of the examples which impacted me the most was the preferred stock of “Textile Finishing Machinery Company”. Preferred stocks were quoting at $3 in 1940. The firm had lost its profit generation capability and, therefore, in 1943 shareholders decided to liquidate the company. Once it was liquidated, shareholders received $190 in total. I meant 6,233% profitability. I know this is an extreme example, but we can see with the extreme inefficiencies of the market.
One of the problems that I see in this book is the lack of examples of mistakes in value investments which seemed obvious “buys” but which became entire failures. I’m sure Benjamin Graham had some of this kind of errors, and if we know his errors I could be much more instructive than if we know his good choices.
The intelligent investor’s strategy is to look for undervalued companies, choosing companies basing on its fundamental value instead of basing on other people’s opinions or market trends. Once we have chosen the adequate companies, we have only to wait for the market to value them correctly with a higher price.
Benjamin Graham used the parable of Mr. Market in order to explain the short-term behavior of the market. Mr. Market has a kind of neurotic problem, which makers that his mood changes drastically from astronomical optimism to an absolute depression. When Mr. Market is depressed, he sells companies’ shares at lower prices than their real value; and when he is euphoric, he buys companies’ shares over that value. These changes in shares’ valuations are due to hid mood changes, without taking into account the real value of the shares that he is buying and selling.
Therefore, an intelligent investor could take advantage of the mood changes of Mr. Market and buy shares when he is depressed and sells very cheap, and sell when he is euphoric and pay much more money for the shares. In conclusion, these market fluctuations are opportunities, so they are not risk synonyms, as professors repeatedly are telling me in my MBS in Finance, as it is one of the bases of Modern Portfolio Theory which is used by many of the world’s most important investment funds. I’ll explain my opinion about risk in other articles.
Another important concept explained in the book is the Margin of Safety. We can say that the Margin of Safety is one of the most important concepts of Value Investing. The Margin of Safety is the difference between the intrinsic value that we calculate for an asset and its current price. For example, if we estimate that the intrinsic value of a company is €10 whilst its current price is €5, the Margin of Safety would be 50%.
Finally, Benjamin Graham concluded his book remembering that every company investment has to be considered as an investment in a business (which is precisely what it is, despite many people don’t take it into account). Hence, these investments have to follow the same principles that follow investments in any kind of business. These four principles of business investments are the following:
- Know what you are going, know your business.
- Do not let anyone else run your business, unless you can supervise his performance with adequate care and comprehension or you have unusually strong reasons for placing implicit confidence in his integrity and ability.
- Do not enter upon an operation – that is, manufacturing or trading an item – unless a reliable calculation shows that it has a fair chance to yield a reasonable profit. In particular, keep away from ventures in which you have little to gain and much to lose.
- Have the courage of your knowledge and experience. If you have formed a conclusion from the facts and if you know your judgement is sound, act on it – even though others may hesitate or differ.
I would like to finish this article recommending this book to all people who are interested in long-term investment, as it is an essential investment classic for people with all knowledge levels in stock markets. Moreover, it’s one of that books that I’d strongly recommend to read relatively often in order to remind the main principles of an intelligent investor.
This article is also available in Spanish
Labels: RECOMMENDED BILBIOGRAPHY





