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The Mistakes We Make and Why We Make Them in Stock Market Investment

BY · March 26, 2015 02:03 pm

What was I thinking? Why did I listen to my friend Maureen? Ohhh God, what will I tell my wife…

If there are questions that investors have asked themselves over the past year and a half, these are the ones. If only I had acted differently, they say. If only, if only, if only.

Yet here’s the problem: While we know that we made investment mistakes, and vow not to repeat them, most people have only the vaguest sense of what those mistakes were, or, more important, why they made them. Why did we think and feel and behave as we did? Why did we act in a way that today, in hindsight, seems so obviously stupid? Only by understanding the answer to these questions can we begin to improve our financial future.
This is where behavioral finance comes in. Most investors are intelligent people, neither irrational nor insane. But behavioral finance tells us we are also normal, with brains that are often full and emotions that are often overflowing. And that means we are normal smart at times, and normal stupid at others.

The trick, therefore, is to learn to increase our ratio of smart behavior to stupid. And since we cannot (thank goodness) turn ourselves into computer-like people, we need to find tools to help us act smart even when our thinking and feelings tempt us to be stupid.

Let me give you one example. Investors tend to think about each stock we purchase in a vacuum, distinct from other stocks in our portfolio. We are happy to realize “paper” gains in each stock quickly, but procrastinate when it comes to realizing losses. Why? Because while regret over a paper loss stings, we can console ourselves in the hope that, in time, the stock will roar back into a gain. By contrast, all hope would be extinguished if we sold the stock and realized our loss. We would feel the searing pain of regret. So we do pretty much anything to avoid that pain—including holding on to the stock long after we should have sold it. Indeed, I’ve recently encountered an investor who procrastinated in realizing his losses on the Eveready stock until a letter from his broker informed him that his portfolio was deactivated and that he needed to trade and make it active again, a trend I think brokers are adopting to beat the odds of financial starvation.

Successful professional traders are subject to the same emotions as the rest of us. But they counter it in two ways. First, they know their weakness, placing them on guard against it. Second, they establish “sell disciplines” that force them to realize losses even when they know that the pain of regret is sure to follow.

So in what other ways do our misguided thoughts and feelings get in the way of successful investing—not to mention increasing our stress levels? And what are the lessons we should learn, once we recognize those cognitive and emotional errors? Here are eight of them.

No. 1
Goldman Sachs is faster than you.

There is an old story about two hikers who encounter a tiger. One says: There is no point in running because the tiger is faster than either of us. The other says: It is not about whether the tiger is faster than either of us. It is about whether I’m faster than you. And with that he runs away. The speed of the Goldman Sachses of the world has been boosted most recently by computerized high-frequency trading. Can you really outrun them?

It is normal for us, the individual investors, to frame the market race as a race against the market. We hope to win by buying and selling investments at the right time. That doesn’t seem so hard. But we are much too slow in our race with the Goldman Sachses.
So what does this mean in practical terms? The most obvious lesson is that individual investors should never enter a race against faster runners by trading frequently on every little bit of news (or rumors).

Instead, simply buy and hold a diversified portfolio. Banal? Yes. Obvious? Yes. Typically followed? Sadly, no. Too often cognitive errors and emotions get in our way. And to beat the odds of making huge losses, they should get professional financial advisory services, though expensive in the short term, in the long run, it will be arch angel they need against the demon of huge losses.

No. 2
The future is not the past and hindsight is not foresight.

Wasn’t it obvious in 2007 that financial institutions and financial markets were about to collapse? Well, it was not obvious to me, and it was probably not obvious to you, either. Hindsight error leads us to think that we could have seen in foresight what we see only in hindsight. And it makes us overconfident in our certainty about what’s going to happen.

Want to check the quality of your foresight? Write down in permanent ink your forecast of tomorrow’s stock prices. Do that each day for a year and check the accuracy of your predictions. You are likely to find that your foresight is not nearly as good as your hindsight.
Some prognosticators say that we are now in a new bull market and others say that this is only a bull bounce in a bear market. We will know in hindsight which prognostication was right, but we don’t know it in foresight.

When I hear in my mind’s ear a voice that says that the stock market is sure to zoom or plunge, I activate my “noise-canceling” device rather than call my broker and trade. You might wish to install this device in your mind as well. Just look at how Kenyan analysts in various websites giving advice that they themselves would not be caught dead partaking in, a clear example of just how the aspect of information availability is distorted.

No. 3
Take the pain of regret today and feel the joy of pride tomorrow.

Emotions are useful, even when they sting. The pain of regret over stupid comments teaches presidents and the rest of us to calibrate our words more carefully. But sometimes emotions mislead us into stupid behavior. We feel the pain of regret when we find, in hindsight, that our portfolios would have been overflowing if only we had sold all the stocks in 2007. The pain of regret is especially searing when we bear responsibility for the decision not to sell our stocks in 2007. We are tempted to alleviate our pain by shifting responsibility to our financial advisers. “I am not stupid,” we say. “My financial adviser is stupid.” Financial advisers are sorely tempted to reciprocate, as the adviser in the cartoon who says: “If we’re being honest, it was your decision to follow my recommendation that cost you money.” And the unfortunate bit is that Kenyan financial advisors are not well known and those that are known deal only for the rich, thus the mass ordinary Kenyans suffer from the ‘friend or relative advice syndrome” a good example is the Safaricom IPO and the pyramid scandal. Many of us depended on friends for advice and we thought we would make money as we did with the Kenge