Manic-depressive Mr. Market can be your friend or your enemy. You can’t control it, but you can control how it affects you. Mr. Market offers a price at which you can either buy or sell shares. If you are not satisfied with the offer, he will come back to it later. This continues from moment to moment, and the real value of the investment is of little importance in the short term. Emotions drive Mr. Market, and you can’t do anything about them. You have to accept them.
A manic Mr. Market moves stock prices up, and a depressive one moves them down. Most of the time, he is almost right. In that case, you cannot determine with sufficient certainty whether the prices are reasonable. Mr. Market can steer prices in the wrong direction for years. Prices go higher and lower than few people believe. This is more the rule than the exception. The direction can change in the blink of an eye, and you cannot predict it. In the long run, Mr. Market is more right than wrong. By acting wisely, you can benefit from both directions. You can buy when the price is lower than the true value and sell when it is higher. Most of the time should be spent doing nothing. Sometimes Mr. Market offers opportunities, in which case it offers you a large margin of safety. In these cases, you need to be able to invest significant amounts. Take full advantage when you can, because you may have to wait years.
A wise investor never has to sell shares, but he sells them because the prices offered by Mr. Market are clearly higher than their true value. The market will go in the wrong direction whether you like it or not. Never invest money that you cannot afford to lose. Mr. Market offers an almost 100% guarantee that it will move some of your investments in the wrong direction and for a long time. If you cannot afford to lose money, it will lose it. As an individual investor, you are in a better position because you can choose, because you are taking advantage of the market. Large organizations are practically forced to take prices offered by Mr. Market all the time.
You need to control your actions. You can avoid unnecessary expenses and keep expectations of future returns reasonable, while others are hysterically chasing the price increases. Investors’ expectations matter. Usually, when the market goes up, so do expectations of returns. During the tech bubble in 1999, investors’ expected returns were 19% per year for the next decade. This meant that results would grow by about 5.7 times in ten years. It is worth noting that the US gross domestic product grew by six times in the last century. This estimate of future prices was completely absurd.
You can reduce Mr. Market’s influence on you by following his actions less often. Following him makes it easier for your subconscious to believe that the prices he offers represent real value. Your subconscious is constantly looking for clues in environment. By following prices, you create anchors for yourself, according to which you determine the value of your investments. At the same time, the calculations and their parameters of your analysis can guide you without realizing it towards the price determined by the market.
A rational investor always tries to keep extra cash to exploit the emotional turmoil of Mr. Market. Sometimes Mr. Market can offer so many attractive options that you have to use almost all your money. You need incredible control to exploit emotional turmoil, which is not easy when Mr. Market, with the help of other investors, offers assessments that contradict your views for years. No one can completely resist them. People are animals that crave action. Even Warren Buffett needs action sometimes, as his partner Charlie Munger has stated, among other things, about Buffett's Berkshire investment in Salomon Brothers.
Mr. Market can affect even patient investors when a large enough herd is running in the same direction. Graham’s story of the oilman at heaven’s gate illustrates the influence of the hordes well: Saint Peter informed the oilman that the places reserved for the oilmen were full. The oilman said, “Can I say four words to them?” Peter says, “Why not?” All the oilmen start rushing from heaven to hell. Peter says, “Well done, now there’s room for you here.” The oilman thinks for a while and says to Peter, “I think I’m going to hell, there may be some truth to the rumor after all.” Unfortunately, this is how we usually act, even though we resist the movements of the people for a long time.