Identifying Behavioral Biases: overconfidence

I wanted to see if we can get behaviors which will contribute to behavioral biases. I will start with overconfidence 1. Trading frequently 2. Setting narrow bands. 3. Anchoring: failing to change forecast or opinion in the light of new information. 4. Not taking into account other relevant factors. Please add or start one for another bias.

Sort of plays into #1, but increased trading costs associated with high turnover.