“Mr. Market is there to serve you, not to guide you.”

Warren Buffett, writing in his 1987 letter to Berkshire Hathaway shareholders:

Ben Graham, my friend and teacher, long ago described the mental attitude toward market fluctuations that I believe to be most conducive to investment success. He said that you should imagine market quotations as coming from a remarkably accommodating fellow named Mr. Market who is your partner in a private business. Without fail, Mr. Market appears daily and names a price at which he will either buy your interest or sell you his.

Even though the business that the two of you own may have economic characteristics that are stable, Mr. Market’s quotations will be anything but. For, sad to say, the poor fellow has incurable emotional problems. At times he feels euphoric and can see only the favorable factors affecting the business. When in that mood, he names a very high buy-sell price because he fears that you will snap up his interest and rob him of imminent gains. At other times he is depressed and can see nothing but trouble ahead for both the business and the world. On these occasions he will name a very low price, since he is terrified that you will unload your interest on him.

Mr. Market has another endearing characteristic: He doesn’t mind being ignored. If his quotation is uninteresting to you today, he will be back with a new one tomorrow. Transactions are strictly at your option. Under these conditions, the more manic-depressive his behavior, the better for you.

But, like Cinderella at the ball, you must heed one warning or everything will turn into pumpkins and mice: Mr. Market is there to serve you, not to guide you. It is his pocketbook, not his wisdom, that you will find useful. If he shows up someday in a particularly foolish mood, you are free to either ignore him or to take advantage of him, but it will be disastrous if you fall under his influence. Indeed, if you aren’t certain that you understand and can value your business far better than Mr. Market, you don’t belong in the game. As they say in poker, “If you’ve been in the game 30 minutes and you don’t know who the patsy is, you’re the patsy.”

Ben’s Mr. Market allegory may seem out-of-date in today’s investment world, in which most professionals and academicians talk of efficient markets, dynamic hedging and betas. Their interest in such matters is understandable, since techniques shrouded in mystery clearly have value to the purveyor of investment advice. After all, what witch doctor has ever achieved fame and fortune by simply advising “Take two aspirins?”

The value of market esoterica to the consumer of investment advice is a different story. In my opinion, investment success will not be produced by arcane formulae, computer programs or signals flashed by the price behavior of stocks and markets. Rather an investor will succeed by coupling good business judgment with an ability to insulate his thoughts and behavior from the super-contagious emotions that swirl about the marketplace. In my own efforts to stay insulated, I have found it highly useful to keep Ben’s Mr. Market concept firmly in mind.

“Politics is that dimension of social life in which things really do become true if enough people believe them.”

David Graeber, 2008:

It is the peculiar feature of political life that within it, behavior that could only otherwise be considered insane is perfectly effective. If you managed to convince everyone on earth that you can breathe under water, it won’t make any difference: if you try it, you will still drown. On the other hand, if you could convince everyone in the entire world that you were King of France, then you would actually be the King of France. (In fact, it would probably work just to convince a substantial portion of the French civil service and military.)

This is the essence of politics. Politics is that dimension of social life in which things really do become true if enough people believe them. The problem is that in order to play the game effectively, one can never acknowledge its essence. No king would openly admit he is king just because people think he is. Political power has to be constantly recreated by persuading others to recognize one’s power; to do so, one pretty much invariably has to convince them that one’s power has some basis other than their recognition. That basis may be almost anything—divine grace, character, genealogy, national destiny. But “make me your leader because if you do, I will be your leader” is not in itself a particularly compelling argument.

In this sense politics is very similar to magic, which in most times and places—as I discovered in Madagascar—is simultaneously recognized as something that works because people believe that it works; but also, that only works because people do not believe it works only because people believe it works. For this why magic, whether in ancient Thessaly or the contemporary Trobriand Islands, always seems to dwell in an uncertain territory somewhere between poetic expression and outright fraud. And of course the same can usually be said of politics.

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“There is no excuse to persist in irresponsible spending.”

The Rational Walk, 2024:

Compound interest is merely one example of an exponential function. Human beings have great trouble thinking in exponential terms. It is far easier to think in linear terms and, because this is our natural instinct, most people vastly underestimate the power of investing over a long lifetime. Compounding takes a long period of time to work its magic and we live in a society that prizes instant gratification above all else.

Part of getting older is gaining insight into the reality that living a good life has far more to do with factors such as health and family that simply cannot be purchased with money. However, money is definitely a prerequisite for living a secure life. Since poverty almost always guarantees misery and since anyone in the middle class or higher can easily attain financial independence over a lifetime, there is no excuse to persist in irresponsible spending. Your future self will thank your present self for being prudent and sensible.

“Stacked up, the Stasi’s complete files reached 125 miles.”

Tina Rosenberg, writing in The Haunted Land: Facing Europe’s Ghosts After Communism (1995):

The Stasi complex on Normannenstrasse in the Lichtenberg district consisted of 41 brown concrete buildings. In addition, the Stasi possessed 1,181 safe houses, 305 vacation homes, 98 sports facilities, and 18,000 apartments for meetings with spies. The Stasi had a budget of 4 billion East German marks. It had 97,000 full-time employees—after the army, it was East Germany’s largest employer. There were 2,171 mail readers, 1,486 phone tappers, and another 8,426 people who monitored phone conversations and radio broadcasts. In addition, there were about 110,000 active unofficial collaborators and perhaps ten times that many occasional informants. The Stasi kept files on 6 million people. There were 39 separate departments—even a department to spy on other Stasi members. A master file with a single card for each Stasi employee, collaborator, and object of surveillance stretches for more than a mile—the cards for people named Müller alone reach a hundred yards. Stacked up, the Stasi’s complete files reached 125 miles. They weighed fifty tons per mile; in total, 62,500 tons.