Warren Buffett: 12 Mistakes Every Investor Makes

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1. Timing the market
2. Getting attached to your purchasing price
3. Aggressive growth projections
4. Using a lot of leverage
5. Missing the forest for the trees
6. Jumping over 7-foot bars
7. Shrinking your universe of opportunities
8. Staying active all the time
9. Diversifying too much
10. Confirmation bias
11. Follow the herd
12. Omission