3. The words you should never say
Bill Mann: Do you think that there are opinions or beliefs in the market that you find to be particularly unhealthy for investors?
Howard Marks: The first thing (and I try to make this clear in the book, and it's essential if people are going to be able to deal with cycles) is everybody wants an easy answer. Everyone wants to know how long an upswing lasts. And the first step is you must dispense with any concept of regularity.
The whole book is based around Mark Twain's statement that history does not repeat but it does rhyme. When he says it doesn't repeat, in our case he wasn't talking about the market. He was talking about history. But the truth is market cycles vary one to the next in terms of their amplitude, their speed, their violence, their duration. It's all different. And so people want to know how long an upswing is and the answer is we absolutely can't tell them. So expecting regularity and, thus, predictability is wrong.
And then you can go from there to the whole concept of predictions. What makes the market go up and down? To a small extent it is what I call fundamental developments in the economy and the companies. But to a large extent it's psychology or, let's say, popularity. And it should be clear by now to everyone that the swings in popularity are unpredictable. And if they are, then most forecasts are not going to work.
So the next concept is that people say to me, "OK, when will the market turn down?" And I never answer a question that starts with the word "when." In the investment business, sometimes we know what's going to happen. We never know when. So I would dispense with that immediately.
You must accept the ambiguity in the situation and accept the need to live with uncertainty. And that's why in the book I say there are certain words that every good investor should drive out of his vocabulary. Things like never, always, must, can't, has to. These words are out. We can talk about likely events. We can talk about probabilities. More and less likely. But we can never say has to or won't.
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