1. Emotional bias: the tendency to believe the things that make you feel good and to disregard things that make you feel bad. In trading terms, this means ignoring the bad news and focusing on the good news. It’s called losing objectivity; you don’t recognise when things go wrong because you don’t want to.
2. Expectation bias: the tendency to believe in things that you expect. In financial terms this means not bothering to analyse, test, measure or doubt the conclusion you expect or hope for. It is also known as the law of small numbers – believing in something with little real evidence.
3. The disposition effect: the tendency to cut your profits and let your losses run – the opposite of what a trader should be doing. Making small profits and big losses is a recipe for disaster.
4. Loss aversion: the tendency to value the avoidance of loss more highly than the making of gain. (more…)