Some excerpts from Michael Edesses's book of the same title (highly summarized by me):
The Simple Facts about Investment Performance
Step 1: Obviously, the average performance of all investors will be equal to the market average, right?
Step 2: Investors in the U.S. stock market are of two types: professionals who are paid to invest their clients' money and everybody else.
Step 3: If professional investors know how to get better investment performance, then their performance as a group ought to be better than everybody else's, right?
Step 4: Professional investors as a class do not outperform the market.
Step 5: Now wait a minute. You keep saying "as a class." Everybody knows that some professional money managers -- the good ones -- outperform the market. But...
Step 6: Some investors will always outperform the market -- probably about half of them.
Step 7: But don't some professional investors consistently beat the market averages?
The answer is no.
Step 8: Nearly all reputable statistical studies show there is no significant consistency or predictability in the performance of professional investors.
Step 9: Market-beating performance is unpredictable.
[pp. 88-90]
This is the best book I've ever read that makes the case that trying to predict the market is a fool's errand (or a Motley Fool's errand, perhaps for some of us.) One out I see here, although Edesses wouldn't approve: perhaps if you are an "amateur" investor you stand a better chance than the pros? If nothing else, you can cut out the middleman (brokers, etc.) and save up to several percent. I dabble in stocks (don't we all?) But to think you can beat the odds is forgivable human nature too. That's "behavioral economics" -- topic for another time.
The Simple Facts about Investment Performance
Step 1: Obviously, the average performance of all investors will be equal to the market average, right?
Step 2: Investors in the U.S. stock market are of two types: professionals who are paid to invest their clients' money and everybody else.
Step 3: If professional investors know how to get better investment performance, then their performance as a group ought to be better than everybody else's, right?
Step 4: Professional investors as a class do not outperform the market.
Step 5: Now wait a minute. You keep saying "as a class." Everybody knows that some professional money managers -- the good ones -- outperform the market. But...
Step 6: Some investors will always outperform the market -- probably about half of them.
Step 7: But don't some professional investors consistently beat the market averages?
The answer is no.
Step 8: Nearly all reputable statistical studies show there is no significant consistency or predictability in the performance of professional investors.
Step 9: Market-beating performance is unpredictable.
[pp. 88-90]
This is the best book I've ever read that makes the case that trying to predict the market is a fool's errand (or a Motley Fool's errand, perhaps for some of us.) One out I see here, although Edesses wouldn't approve: perhaps if you are an "amateur" investor you stand a better chance than the pros? If nothing else, you can cut out the middleman (brokers, etc.) and save up to several percent. I dabble in stocks (don't we all?) But to think you can beat the odds is forgivable human nature too. That's "behavioral economics" -- topic for another time.