Investor Bias Test — Overconfidence, Loss Aversion, Herding, Disposition

Find out which of four behavioral biases, overconfidence, loss aversion, herding and the disposition effect, is shaking your trading. Twelve questions in about four minutes, scored 0-12 per area with four bands. Items written by Soundary; not investment advice.

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What's included

Questions: 12 items
Price: Free
Areas measured: Overconfidence Bias · Loss Aversion Bias · Herding Bias · Disposition Effect Bias

When this check is worth taking

If you sell quickly the moment a position shows a small gain but hold losers for months waiting to break even, if you bought a stock because everyone in your chat group was buying and you feared missing out, or if a few wins left you feeling you read the market better than most, this check is worth a few minutes. These patterns come not from a lack of knowledge but from how the human mind works. Behavioral finance has studied them for decades under the names overconfidence, loss aversion, herding and the disposition effect.

You answer 12 items while recalling your investing over the past year, across stocks, crypto, funds, property and so on, and each of the four biases is scored separately from 0 to 12 on three items. What matters is not a total but which bias is relatively strong for you. Soundary wrote every item from scratch around the constructs of behavioral finance; they are not a translation of any standardized test. If you have little investing experience, it is fine to answer by imagining how you would behave.

What to do with your result

Each of the four areas reads the same way: 0-3 low, 4-6 moderate, 7-9 high and 10-12 very high. The most effective step is to pick your single highest area and build one rule for that bias. For overconfidence, write down the reasoning behind each purchase and compare it with the actual outcome later. For loss aversion, set a loss limit in percentage terms, not in money, before you buy. For herding, give yourself a one-day cooling-off period before any decision. For the disposition effect, write your target and your limit at the moment you buy.

Biases, like temperament, do not change quickly, but how strongly they show depends on the market. Retaking the check after a sharp fall or rally, or every six to twelve months, reveals which situations amplify which bias. If loss aversion stands out, explore it further with the loss aversion scale, and see how much risk you are willing to take with the investment risk tolerance check. If you keep avoiding your account or freezing on decisions, and your sleep or mood is suffering, it is time to ask whether the amount you have invested exceeds what you can psychologically bear. This result is a self-check reference only, not investment advice, and any investment decision and its outcome remain your own responsibility.

How scores are interpreted

Overconfidence Bias

The tendency to overestimate one's own information and predictive abilities compared to reality. The sum of 3 items ranges from 0 to 12 points; a higher score indicates a stronger overconfidence bias.

0–3pts · Low
You tend to evaluate your judgment relatively objectively. Keep up your current attitude of verifying evidence and considering opposing views.
4–6pts · Moderate
You may occasionally show a tendency to be more certain of your predictions than reality warrants. It helps to make a habit of asking yourself, 'What signals would I see if I were wrong?' before buying or selling.
7–9pts · High
You are likely to overestimate your information and predictive abilities. Since overconfidence easily leads to frequent trading and concentration in a few stocks, it is advisable to record the rationale for your judgments and compare them with actual results later.
10–12pts · Very High
Your overconfidence bias is very strong. Check whether you are attributing successes to skill and failures to bad luck. Investment decisions and outcomes are your own responsibility, and this result is a reference for self-assessment.

Loss Aversion Bias

The tendency to feel losses much more intensely than gains of the same size, skewing judgments toward avoiding losses. The sum of 3 items ranges from 0 to 12 points; a higher score indicates a stronger loss aversion bias.

0–3pts · Low
You tend to show a relatively balanced emotional response even in the face of losses. However, being indifferent to losses does not necessarily mean good risk management, so it is still important to set an acceptable range in advance.
4–6pts · Moderate
You have some degree of the universal human tendency to feel losses more heavily than gains. Setting a loss limit in advance will help reduce emotionally driven decisions.
7–9pts · High
The pain of loss is at a level where it can heavily influence your decision-making. Strong loss aversion can cause you to delay necessary stop-losses or avoid opportunities altogether, so try setting rules based on percentages rather than amounts in advance.
10–12pts · Very High
The fear of loss is likely to dominate your overall investment behavior. If avoiding account checks or decision paralysis repeats, check whether the investment amount itself has exceeded your psychologically manageable range. Investment decisions and outcomes are your own responsibility, and this result is for reference.

Herding Bias

The tendency to buy and sell following the movements of the majority or the surrounding atmosphere rather than your own analysis. The sum of 3 items ranges from 0 to 12 points; a higher score indicates a stronger herding bias.

0–3pts · Low
You tend to judge based on your own standards rather than the surrounding atmosphere. Independent judgment is a strength, but try to maintain a balance by not completely shutting out the perspectives of others.
4–6pts · Moderate
Communities or what people around you say have some influence on your judgment. It helps to distinguish between gathering information and 'following the herd,' and to make a habit of writing down the reason for buying in one sentence before making a purchase.
7–9pts · High
You show a clear tendency to conform to the movements of the majority. Since chasing buys out of fear of missing out and panic selling with the crowd can repeat, you need to practice making decisions based on evidence you can explain yourself, not on others' certainty.
10–12pts · Very High
Your herding bias is very strong. Remember that when 'everyone is buying,' expectations are often already priced in, and try implementing your own rules, such as a one-day cooling-off period before making a decision. Investment decisions and outcomes are your own responsibility, and this result is for reference.

Disposition Effect Bias

The tendency to quickly sell assets that have gained in value and hold onto losing assets for a long time. The sum of 3 items ranges from 0 to 12 points; a higher score indicates a stronger disposition effect bias.

0–3pts · Low
You appear to sell based on your original plan rather than whether you are at a profit or loss. Keep up your current approach of making a plan first and sticking to it.
4–6pts · Moderate
You may occasionally show a tendency to rush to lock in profits and delay taking losses. Setting selling conditions (targets and limits) at the time of purchase can reduce emotional involvement.
7–9pts · High
The pattern of 'taking profits quickly but failing to cut losses' is relatively clear. If the break-even mentality and averaging down repeat, losses can grow, so try changing your selling criteria from 'my purchase price' to 'would I buy this asset right now if I were buying it fresh?'
10–12pts · Very High
Your disposition effect bias is very strong. Check if you are holding onto assets with unrealized losses for a long time, and it is recommended to write down your selling rules in advance. Investment decisions and outcomes are your own responsibility, and this result is a reference for self-assessment.

Sample questions

1. I feel that the stocks or assets I pick myself are highly likely to outperform the market average.
2. Even for the same amount, the pain of a loss is much greater and lasts longer than the joy of a gain.
3. If it is a stock that everyone is buying in communities, group chats, or on YouTube, I want to buy it too for fear of missing out.
4. Even with a small profit, I tend to sell quickly with the mindset of 'taking it before it drops.'

Thinking about your investment experiences over the past year (domestic and international stocks, crypto, funds, real estate, etc.), please choose how closely each statement describes your usual self. If you have little investment experience, you may answer by imagining 'what it would be like if I invested.' There are no right or wrong answers, and the more honestly you answer, the more accurate the results will be.

FAQ

How do I read my investor bias scores?

The four areas, overconfidence, loss aversion, herding and the disposition effect, are each scored 0-12 on three items. In every area, 0-3 is low, 4-6 moderate, 7-9 high and 10-12 very high. There is no total score; the point is to see which bias is relatively strong for you. The most practical use is to build one trading rule for your single highest area.

If my bias scores are high, should I stop investing?

No. These biases are common mental habits that most people have to some degree, and once you know yours you can offset them with rules. The scores are a map of the situations in which you are likely to waver; they do not decide whether or what you should invest in. The result is for reference only and is not investment advice; any investment decision and its outcome remain your own responsibility.

How is this different from the loss aversion scale?

This check is a map: it surveys four biases with three items each to show which is relatively strong. The loss aversion scale goes deep on one bias, with 10 items scored 0-30. If your loss aversion area here comes out high, at 7 or above, look closer with the loss aversion scale, and add the investment risk tolerance check to see how much risk you are willing to take. Together they complete the picture.

How often should I retake it?

Biases change slowly, so every six to twelve months is a comfortable rhythm. Retaking it right after a sharp fall or rally, however, may give a different result from usual, and that gap itself tells you which market conditions unsettle you. Saving your results and noting whether you actually kept the rules you set makes the next decision much easier.

Source

The items in this test are a self-check adaptation based on the original instrument and literature below: Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263–291. / Shefrin, H., & Statman, M. (1985). The disposition to sell winners too early and ride losers too long: Theory and evidence. Journal of Finance, 40(3), 777–790. — A Soundary self-check whose items were all written from scratch with reference to the constructs of behavioral finance (overconfidence, loss aversion, herding, disposition effect). It is not a translation or adaptation of any standardized test; the score bands are Soundary's own reference thresholds, and the result is not investment advice.

This is a self-screening tool, not a medical diagnosis. If the result concerns you, please consult a mental health professional.