Stock Market Glossary
Overconfidence
Behavioral bias in which investors overestimate their skills and information.
In brief: Behavioral bias in which investors overestimate their skills and information.
Meaning in practice
Overconfidence leads to too large positions, too many trades and too little diversification. Studies show that investors who trade less often and stay true to their plan do significantly better in the long term.
Context for investors and traders
The term describes a common behavioural bias that can become especially visible during sharp market moves. It is not a judgement on individual investors, but a prompt to make decisions understandable and repeatable.
How to use this in practice
A simple decision process is an effective countermeasure: note the trigger, set objective and risk, then act. It makes clear whether a decision rests on testable information or on FOMO, fear or the urge to recover a loss quickly.
What to keep in mind
Review decisions at calm intervals instead of after every market move. Changing rules retrospectively removes the benchmark; following them rigidly should still leave room for genuinely relevant new information.
