Trading Psychology

The Hidden Price of Every Winning Trade

You follow your plan, execute well and get rewarded. Everything appears to be working. There is a hidden consequence to that win, and it is where the next blown week starts.

This is the central paradox of trading. Most traders understand the consequences of winning a bad trade. You break your rules, make money, and reinforce a behaviour that could blow your account.

Almost nobody talks about the psychological consequences of winning a good trade. You follow your plan, you are patient, you execute flawlessly and you get rewarded. Everything appears to be working as it should. This is where overconfidence in trading begins.

Pride, Shame and Being Level With the Market

Once you have a strategy and an edge, the whole game becomes management of yourself: the prides and shames that take you away from your plan.

  • Level. You are neither exaggerating nor minimising yourself. You see the market for what it is, and when it offers an opportunity you act with controlled risk.
  • Pride. You exaggerate your ability and minimise risk. You are more likely to talk down on the market and take low quality setups.
  • Shame. You minimise yourself and exaggerate risk. When the market offers a setup from your plan, you are too fearful to act.

Every win reinforces the state of pride. It makes you a little more proud, and it feeds the fantasy you hold of yourself.

The Piggy Bank: How Wins Build Overconfidence in Trading

If you do not have the psychology to process and integrate a win, it builds a fantasy and an expectation of one-sidedness.

Think of a piggy bank in your mind. Every time you take a win, it gets stored there. It is a self-exaggeration above equilibrium, and it feeds pride and overconfidence.

Thaler and Johnson, Management Science, 1990

Gambling with the House Money and Trying to Break Even: The Effects of Prior Outcomes on Risky Choice

In real money experiments, people took more risk after a prior gain, which the authors called the house money effect. Decision makers are supposed to weigh only the bet in front of them. In practice, what just happened changes how much risk they are willing to take.

The central cost is an unrealistic expectation: that you will always be winning, and that you can predict and replicate what just happened at any time, in any place, at any amount.

Gervais and Odean, Review of Financial Studies, 2001

Learning to Be Overconfident

The authors model traders who learn about their own ability from their results and take too much credit for their successes. Overconfidence builds as a consequence, and the overconfident trader trades too aggressively, which lowers their own expected profits.

All prides and all fantasies eventually get humbled in the market. It is wiser to do it yourself through self-management than to let the market do it for you.

What Pride Costs You, in Trading and Outside It

In the market, pride disconnects you from reality. You form ideas in a state of invincibility and only take in the information that confirms them. It makes you more gullible, more naive about risk, and more attached to fast money, which trains gambling-like and compulsive behaviour.

Then it spreads into the rest of life:

  • Wealth. Slow accumulation and compounding stop being attractive, so strategies that work get squandered because they do not match the fantasy of fast money.
  • Career. The secure job and guaranteed pay look poor by comparison. You show up with less enthusiasm, or want to leave it and put your family at risk.
  • Relationships. In pride, traders start talking down to people, believing they are better than others, and isolate friends and family.

Pride Is a Small Sample

Pride is an indication of a small time horizon and a narrow perspective. It is usually built over a winning streak: a good week, a good month, one passed challenge, one payout.

From that small sample you build yourself up and anchor to the high. The next week or month there is a reversion to your true mean, and you conclude you are on the bust cycle and something is wrong with you.

Tversky and Kahneman, Psychological Bulletin, 1971

Belief in the Law of Small Numbers

People tend to treat a small sample as though it were representative of the whole, and place far more confidence in early results than the data supports.

The amygdala does everything it can to keep you on a small time horizon, because it is dedicated to immediate survival. It wants each thing to be good or bad so it can seek or avoid. A trader run by it puts enormous weight on the individual trade, labels a win good, attaches to the dopamine of it, and then has an extreme pain response to the inevitable loss. That loss is where the revenge trading begins.

Frequency: How Fast Can You See Both Sides?

Your frequency is your ability to see both sides of an outcome.

If it takes you three weeks to realise that a loss helped you tighten up and focus on higher quality setups, your frequency is low. The same if it takes three weeks to see that a win made you more gullible and more likely to take a poor setup. You will oscillate between pride and shame the whole time.

Think of a spinning top, half black for losing and half white for winning. Spin it fast enough and the two blend into grey. As it slows, it goes black, white, black, white.

How to Process a Win

  • Straight after a win, find its drawbacks. Where has it made you more likely to over-risk, overtrade or take a lower quality setup?
  • Straight after a loss, find its advantages. Where did it tighten you up and point you back to higher quality setups?
  • Broaden the time horizon. A high is money in the bank for future lows. A low is compensating for previous highs.
  • Set your expectation at the mean. Your true edge, not the dopamine rush of your best week.
The counter

The faster you can see the drawbacks of a win and the advantages of a loss, the less either outcome moves you. That is when the higher functions stay in charge and you can moderate your risk and stick to your plan.

False Winning and True Consistency

Most traders get stuck reinforcing the fantasy of winning the individual trade. I call this false winning. If I am winning each trade, I am a profitable trader.

That is a one-sided expectation, because your probability model guarantees losses. The more attached you are to it, the more every normal loss feels like failure.

True consistent profitability encompasses both losing and winning in pursuit of your edge. False consistent profitability is winning all the time.

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Frequently asked questions

What causes overconfidence in trading?

Unprocessed wins. Each win reinforces a state of pride and builds an expectation that you will keep winning and can repeat the result at any time and any size. In that state you minimise risk and exaggerate your own ability, which leads to forcing low quality setups, over-risking and overtrading.

Why do I give back profits after a winning streak?

A winning streak is a small sample, and it is easy to anchor your expectations to its high point. Pride makes you feel invincible, so you take setups and size you would normally pass on. Results then revert towards your true average, and the profits built up in the streak get spent.

Is winning a good trade ever a problem?

It can be. Even a win that followed your plan feeds pride if it is not processed. The win is not the issue. The issue is the fantasy of one-sidedness it can build, which disconnects you from the reality of the market and from your process.

How should I handle a big winning trade?

Straight after the win, identify its drawbacks: where it might make you more gullible, more likely to over-risk or more likely to take a poor setup. Then broaden your time horizon and set your expectation at your average result, not at your best week or month.

What is the difference between false winning and true consistency?

False winning is the belief that being profitable means winning every individual trade. True consistency includes both wins and losses in pursuit of your edge. Losses are part of any probability model, so expecting only wins makes every normal loss feel like failure.

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