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A Few Notes on The Little Book of Behavioral Investing

The Little Book of Behavioral Investing: How Not to Be Your Own Worst Enemy, author James Montier states: “I…highlight some of the most destructive behavioral biases and common mental mistakes that I’ve seen professional investors make. I’ll teach you how to recognize these mental pitfalls while exploring the underlying psychology behind the mistake. Then I show you what you can do to try to protect your portfolio from their damaging influence on your returns.” Biases he surveys include: action bias, bias for stories, confirmation bias, conformity bias (herding or groupthink), conservatism (including sunk cost fallacy), disposition effect, empathy gap, endowment effect, hindsight bias, illusion of control, inattentional blindness, information overload, loss aversion, myopia, overconfidence, overoptimism, placebo effect, self-attribution bias and self-serving bias). Value investing provides the context for discussion. Citing a number of studies, he concludes that:

“…we should do our investment research when we are in a cold, rational state–and when nothing much is happening in markets–and then pre-commit to following our own analysis and prepared action steps.”

“…fear causes people to ignore bargains when they are available in the market… The ‘battle plan for reinvestment’ is a schedule of pre-commitments…”

“We should get used to asking ‘Must I believe this?’ rather than… ‘Can I believe this?’” (more…)

10 Most Common Behavioral Biases

I offer my list of Investors’ 10 Most Common Behavioral Biases.  There are a number of others, of course, and more will continue to be uncovered.  But I think that these are the key ones.  Your suggestions of important ones I have missed are welcome.

  1. Confirmation Bias. We like to think that we carefully gather and evaluate facts and data before coming to a conclusion.  But we don’t. Instead, we tend to suffer from confirmation bias and thus reach a conclusion first.  Only thereafter do we gather facts and see those facts in such a way as to support our pre-conceived conclusions.  When a conclusion fits with our desired narrative, so much the better, because narratives are crucial to how we make sense of reality.
  2. Optimism Bias.  This is a well-established bias in which someone’s subjective confidence in their judgments is reliably greater than their objective accuracy. Indeed, we live in an overconfident, Lake Wobegon world (“where all the women are strong, all the men are good-looking, and all the children are above average”).  We are only correct about 80% of the time when we are “99% sure.” Fully 94% of college professors believe they have above-average teaching skills (anyone who has gone to college will no doubt disagree with that). Since80% of drivers  say that their driving skills are above average, I guess none of them drive on the freeway when I do.  While 70% of high school students claim to have above-average leadership skills, only 2% say they are below average, no doubt taught by above average math teachers. In a truly terrifying survey result, 92% students said they were of good character and 79% said that their character was better than most people even though 27% of those same students admitted stealing from a store within the prior year and 60% said they had cheated on an exam. Venture capitalists are wildly overconfident in their estimations of how likely their potential ventures are either to succeed or fail. In a finding that pretty well sums things up, 85-90% of people think that the future will be more pleasant and less painful for them than for the average person.
  3. Loss Aversion. We are highly loss averse.  Empirical estimates find that losses are felt between two and two-and-a-half as strongly as gains.  Thus the disutility of losing $100 is at least twice the utility of gaining $100. Loss aversion favors inaction over action and the status quo over any alternatives. Therefore, when it comes time for us to act upon the facts and data we have gathered and the analysis we have undertaken about them, biases 2 and 3 – unjustified optimism and unreasonable risk aversion – conflict. As a consequence, we tend to make bold forecasts but timid choices.  (more…)

Remember These 13 Points

  1. Predictions do not work as tomorrow is uncertain. We will only boast about things we have predicted right and talk nothing about the other half we got wrong.
  2. Skills can bring us moderate success. However, luck is needed to be a big success. (credit to Jon)
  3. We tend to credit our successes to good skills and blame our failures on poor luck.
  4. Some of us rely on luck (most unknowingly) by investing for high returns (and losses). A few of us will make big money but most of us will end up much poorer.
  5. Some of us deliberately limit the luck factor by choosing investment products with capital guarantee and guaranteed returns. None of us will make big money but none of us will be very much poorer.
  6. We need to know how much we can afford to lose (financially and emotionally) before deciding to be No. 4 or No. 5, or somewhere in between.
  7. We have many biases. The degree of success in investing or trading depends on how much we can keep our biases in check. No, we cannot remove our biases totally.
  8. Confirmation bias – we see what we want to see. We seek out evidence to validate our investment decision and ignore those that suggest otherwise.
  9. Availability bias – we are influenced by the things we observe. If people we knew made a lot of money through property investment, we will think that properties are the best investments in the world and develop a preference for it.
  10. Loss aversion bias – we want to be compensated for high returns before we decide to take the risk to invest. We often wait for markets move and show high returns before we want to invest. We are not interested if markets are not moving.
  11. Hindsight bias – we tend to say “I knew it” after an event has happened.
  12. Survivor-ship bias – we only get to hear stories of successes but many stories of failures were untold.  See No 2 and No 3.
  13. Most us do not know what we want in life. We think we will be happier with more money.

12 Cognitive Biases that Prevent you From Being Rational

Confirmation Bias – The tendency for people to favor information that confirms their beliefs or ideas.  Investors and economists often fail to fully appreciate other views due to a narrow minded view of the world often resulting from what they think they already know.

Ingroup bias – the tendency to favor one’s own group.  In investing and economics we see this in ideologies and particular strategies.  Austrians favor those who believe their own thinking.  Chartists dislike value investors.  Often times, the strongest economists and investors are the ones who are able to move beyond this ingroup bias and explore the potential that other groups have something positive to contribute.

Gambler’s Fallacy – When an individual erroneously believes that the onset of a certain random event is less likely to happen following an event or a series of events.  We see this in trading all the time.  This is the belief that just because something has occurred in the past that it is more likely to occur in the future.  The “trend is your friend” and that sort of thing….

Post-Purchase Rationalization – When one rationalizes past purchases after the fact in an attempt to justify past actions.  Investors often learn about how a bad trade turns into an investment when they rationalize their past purchases.  If you’ve been in the business for a while you know how destructive this can be. (more…)

13 Things- Learned About Humans and the Financial Markets

  1. Predictions do not work as tomorrow is uncertain. We will only boast about things we have predicted right and talk nothing about the other half we got wrong.
  2. Skills can bring us moderate success. However, luck is needed to be a big success. (credit to Jon)
  3. We tend to credit our successes to good skills and blame our failures on poor luck.
  4. Some of us rely on luck (most unknowingly) by investing for high returns (and losses). A few of us will make big money but most of us will end up much poorer.
  5. Some of us deliberately limit the luck factor by choosing investment products with capital guarantee and guaranteed returns. None of us will make big money but none of us will be very much poorer.
  6. We need to know how much we can afford to lose (financially and emotionally) before deciding to be No. 4 or No. 5, or somewhere in between.
  7. We have many biases. The degree of success in investing or trading depends on how much we can keep our biases in check. No, we cannot remove our biases totally.
  8. Confirmation bias – we see what we want to see. We seek out evidence to validate our investment decision and ignore those that suggest otherwise.
  9. Availability bias – we are influenced by the things we observe. If people we knew made a lot of money through property investment, we will think that properties are the best investments in the world and develop a preference for it.
  10. Loss aversion bias – we want to be compensated for high returns before we decide to take the risk to invest. We often wait for markets move and show high returns before we want to invest. We are not interested if markets are not moving.
  11. Hindsight bias – we tend to say “I knew it” after an event has happened.
  12. Survivor-ship bias – we only get to hear stories of successes but many stories of failures were untold.  See No 2 and No 3.
  13. Most us do not know what we want in life. We think we will be happier with more money.

Irrational and Odd Behaviors of Traders

Anchoring: our habit of focusing on one salient point and ignoring all others, such as the price at which we buy a stock.

Bias Blind Spot: we agree that everyone else is biased, but not ourselves.

Confirmation Bias: we interpret evidence to support our prior beliefs and, if all else fails, we ignore evidence that contradicts it.

Disposition Effect: we prefer to sell shares whose value has increased and keep those whose value’s dropped.

Framing: the way a question or situation is framed can determine your response.

Fundamental Attribution Error: we attribute success to our own skill and failure to everyone else’s lack of it.

Herding: we tend to flock together, especially under conditions of uncertainty.

Illusion of Control: we do things that make us feel in control, even if we’re not.

Loss Aversion: we do stupid things to avoid realizing a loss.

Overconfidence: we’re way too confident in our abilities, which seems to be an in-built bias that we’re unable to overcome without excessive effort.

Perhaps good traders aren’t born but rather made

How much of trading success can be attributed to innate ability? The answer is, as Richard Dennis and Bill Eckhardt proved with their Turtle Trader experiment back in the early 80′s, none. Trading is a skills based activity in which we make decisions under conditions of uncertainty and risk. We can have uncertainty without risk but it is impossible to have risk without uncertainty.

What is innate that has an impact on our trading are habits. MIT’s McGovern Institute for Brain Research suggests that habit formation is indeed an innate ability which is perfected through experience. In particular, their research focused on the costs and rewards of certain choices using pattern recognition, much like trading.

Neuroscientists led by Institute Professor Ann Graybiel found that untrained monkeys performing a simple visual scanning task gradually developed efficient patterns that allowed them to minimize the time it took to receive their reward.
The findings not only help reveal how the brain forms habits, but also could shed light on neurological disorders where amplified habit-formation results in highly repetitive behavior, such as Tourette’s syndrome, obsessive-compulsive disorder and schizophrenia, says Graybiel.

The process of trading, from scanning the markets for a setup to closing the position, consists of a sequence of tasks. Over time we create habits by combining these tasks together in a process. Our tendency is to use heuristics or mental shortcuts to make the tasks easier on our brains. In doing so we open ourselves up to certain cognitive biases such as framing, anchoring and confirmation bias. If these are formed early in a trading career they can be detrimental to our equity curves and potential as a successful trader.

So perhaps good traders aren’t born but rather made. Traders are made by the habits they form. It takes, on average, 21 days to form a habit while taking much longer to unlearn one. Certain characteristic traits, namely Conscientiousness with two of its facets–self-efficacy and self-discipline, lend themselves nicely to forming good habits. Other characteristic traits, such as Neuroticism, can lead to bad habits. It’s therefore important to know what characteristic traits you bring to the markets.

If you’ve been in the markets for a while and find yourself unsuccessful, the culprit may be the habits and biases you’ve formed early in your trading. As humans our brains have a difficult time in distinguishing between good and bad habits. The good news is that bad habits can be changed into good habits through interrupting the habit cycle and changing the routine. Interrupting the cycle is easier than it sounds and well worth the effort as longevity in the markets as a successful trader is the reward.