Market timing doesn't work. If all the bubbles and all this mispricing really exist, how come so few people see it before it turns out that way?
Interpretation
Market timing is unreliable, and few people can consistently predict market movements before they happen.
Eugene Fama's quote emphasizes the challenges of timing the market and suggests that if bubbles and mispricings are truly prevalent, it is puzzling that so few investors can foresee such events before they materialize. Fama's perspective aligns with the efficient market hypothesis, which argues that asset prices reflect all available information and that trying to predict market fluctuations is a difficult, if not impossible, endeavor.
In practice
During a finance seminar, discussing the unpredictability of market timing.
The problem that people don't understand is that active managers, almost by definition, have to be poorly diversified. Otherwise, they're not really active. They have to make bets. What that means is there's a huge dispersion of outcomes that are totally consistent with just chance. There's no skill involved it. It's just good luck or bad luck.
After costs, only the top 3% of managers produce a return that indicates they have sufficient skill to just cover their costs, which means that going forward, and despite extraordinary past returns, even the top performers are expected to be only as good as a low-cost passive index fund. The other 97% can be expected to do worse.
There's quite a bit of evidence that even professionals don't show any ability to pick stocks or to predict market rollbacks. Most of the people we identify as skilled based on returns have probably just been lucky.
Finance that only talks to itself & deals with each other becomes socially useless
Your priorities, passions, goals, and fears are shown clearly in the flow of your money.
Working for company X and having a substantial portion of your retirement plan in company X is simply exposing yourself to too much risk, because the company is both your employer and the source of your retirement income. So if something goes wrong, you lose both your job and your retirement plan.
I am more and more impressed with the possibilities of history's repeating itself on many different counts. You don't get very far in Wall Street with the simple, convenient conclusion that a given level of prices is not too high.
Investors have few spare tires left. Think of the image of a car on a bumpy road to an uncertain destination that has already used up its spare tire. The cash reserves of people have been eaten up by the recent market volatility.
Investors must keep in mind that there's a difference between a good company and a good stock. After all, you can buy a good car but pay too much for it.
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