Confirmation Bias
Confirmation bias is the tendency to seek out, notice and believe information that supports what you already think, while ignoring or dismissing evidence against it. In investing it can keep you in a bad position long after the facts have changed.
How the bias works
Psychologists have studied this tendency for decades. People do not process information neutrally: we search for sources that agree with us, interpret unclear news in our favour, and remember the hits better than the misses.
It is not a sign of low intelligence. It is a mental shortcut that saves effort, and it gets stronger when we have money, pride or identity tied to a view.
How it shows up in crypto
Once you hold a coin, it is tempting to follow only accounts that are positive about it, to treat every partnership announcement as proof, and to explain away price drops as manipulation. Online communities around a coin can amplify this, because dissent is often unwelcome.
Traders show it too: after deciding a market is bullish, they see bullish patterns everywhere on the chart and overlook signals that point the other way.
An example
Say you buy a token because you believe its new product will bring many users. Months later, usage data shows little growth, a key developer has left, and the team has delayed the launch twice. You skim past those reports but share a single upbeat interview with the founder. Your original thesis has been weakened by the evidence, yet your confidence has not moved.
Ways to counter it
Write down your reasons for a trade or investment before entering, and define what would prove you wrong. A trading journal makes it harder to rewrite history later.
Actively look for the best argument against your position, ideally from someone you respect who disagrees. Setting exit rules in advance, such as a stop loss or a review date, also takes part of the decision out of your mood.
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Frequently asked questions
Can you eliminate confirmation bias?
Not completely; it is part of how human thinking works. You can reduce its effect with habits such as written theses, predefined exit rules and deliberately reading opposing views.
What is an example of confirmation bias in trading?
Holding a losing position and only reading news that suggests it will recover, while ignoring data showing the original reason for the trade no longer holds.
How is confirmation bias different from FOMO?
FOMO is fear of missing gains that pushes you into a trade. Confirmation bias is the filter that keeps you believing your view once you are in it. They often appear together.
Related terms
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