Cognitive Biases That Affect Traders

Humans have weaknesses that hamper their trading capabilities. Many were developed in ancient times and were important for survival. I will enumerate the most important:
1) Loss Aversion: the strong tendency for people to prefer avoiding losses over acquiring gains

2) Sunk Cost Effect: The tendency to treat money that already has been committed or spent as more valuable than money that may be spent in the future

3) Disposition Effect: the tendency for people to lock in gains and ride losses

4) Outcome Bias: The tendency to judge a decision by its outcome rather then by the quality of the decision at the time it was made

5) Recency Bias: the tendency to weigh recent data or experience more than earlier data or experience

6) Anchoring: the tendency to rely too heavily, or anchor, on readily available information (more…)

Morgan Housel’s 9 Financial Rules

1. Nine out of 10 people in finance don’t have your best interest at heart.
2. Don’t try to predict the future.
3. Saving can be more important than investing.
4. Tune out the majority of news.
5. Emotional intelligence is more important than classroom intelligence.
6. Talk about your money.
7. Most financial problems are caused by debt.
8. Forget about past performance.
9. The perfect investment doesn’t exist.
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