Key Takeaways
- The "behavior gap" costs average investors 1.7–3.0% per year in returns due to poor timing decisions driven by cognitive biases.
- Over 30 years, the behavior gap can reduce wealth by more than 50% — from $1.5M to $722K on a $100K investment.
- The five most destructive biases: loss aversion, recency bias, overconfidence, anchoring, and herd behavior.
- Automation (target-date funds, automatic contributions) is the most effective bias mitigation strategy.
- Pre-commitment strategies — writing rules before emotional situations arise — increase savings rates by 3–4x.
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Test Your Knowledge
1.According to Dalbar's QAIB study, by how much did the average equity fund investor underperform the S&P 500 annually over 30 years?
2.What is loss aversion?
3.What is the most effective strategy for mitigating cognitive biases in investing, according to research?