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Do You Make These Mistakes?

My good friend Jonathan Sills passed along an interesting list of “Common Mental Mistakes” that I think we can all relate to. The list was originally developed by Whitney Tilson, and it occurred to me that I see many of these mistakes occur in my own business and among friends and clients on an almost daily basis –

Common Mental Mistakes

1. Overconfidence
2. Projecting the immediate past into the distant future
3. Herd-like behavior (social proof), driven by a desire to be part of the crowd or an assumption that the crowd is omniscient
4. Misunderstanding randomness; seeing patterns that don’t exist
5. Commitment and consistency bias
6. Fear of change, resulting in a strong bias for the status quo
7. “Anchoring” or irrelevant data
8. Excessive aversion to loss
9. Using mental accounting to treat some money (such as gambling winnings or an unexpected bonus) differently than money
10. Allowing emotional connections to over-ride reason
11. Fear of uncertainty
12. Embracing certainty (however irrelevant)
13. Overestimating the likelihood of certain events based on very memorable data or experiences (vividness bias)
14. Becoming paralyzed by information overload
15. Failing to act due to an abundance of attractive options
16. Fear of making an incorrect decision and feeling stupid (regret aversion)
17. Ignoring important data points and focusing excessively on less important ones; drawing conclusions from a limited sample size
18. Reluctance to admit mistakes
19. After finding out whether or not an event occurred, overestimating the degree to which one would have predicted the correct outcome (hindsight bias)
20. Believing that one’s investment success is due to wisdom rather than a rising market, but failures are not one’s fault
21. Failing to accurately assess one’s investment time horizon
22. A tendency to seek only information that confirms one’s opinions or decisions
23. Failing to recognize the large cumulative impact of small amounts over time
24. Forgetting the powerful tendency of regression to the mean
25. Confusing familiarity with knowledge

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One Response to Do You Make These Mistakes?

  1. Bizzy Life Author Avatar Tim says:

    For more on Whitney Tilson go to http://www.t2partnersllc.com/

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