6 Biggest Behavior Pitfalls for Investors

1. Avoid losses at all costs: Loss aversion​
2. "I am the greatest1" Confirmation bias
3. Getting stuck on the first thing you see: Anchoring bias
4. The breaking news problem: Recency bias
5. There is safety in numbers ... right?  Herding bias
6. The devil you know: Ambiguity aversion

If you want to know more details about these 6 pitfalls, Fidelity.com has a more detailed article explaining them.