Key Data and Analysis
Six psychological biases that keep investors in high-fee funds with antidotes
| Bias | How It Manifests in ETF Fees | Antidote |
|---|---|---|
| Abstraction bias | Percent feels smaller than dollars | Always calculate fee in dollars, not % |
| Status quo bias | Keeping current fund feels safe | Annual review forces active decision |
| Brand familiarity | Big name fund feels more trustworthy | Compare 10-yr after-fee returns, not brand |
| Advisor authority | Advisor must know best fund | Ask advisor to show after-fee benchmark comparison |
| Loss aversion (switching) | Fear of selling at a loss | Focus on future savings, not past history |
| Sunk cost fallacy | Invested $10K — can’t switch now | Past investment is irrelevant; future costs are not |
ℹ️The Abstraction Problem Is the Root Cause
0.75% looks trivial. $75,000 in fees on $100,000 over 25 years does not. The entire solution to behavioral fee overpayment is translating abstract percentages into concrete dollar amounts — which is exactly what the fee calculator does.
Scenarios and Comparison
Interventions that reduce high-fee fund persistence
| Intervention | Effectiveness | Evidence |
|---|---|---|
| Show dollar cost (not percent) | High — concrete amounts motivate action | Behavioral economics research |
| Annual review commitment | High — creates decision point | Default persistence research |
| Automatic low-fee enrollment | Very high — removes decision | 401(k) auto-enrollment research |
| Peer comparison (others pay less) | Moderate — social comparison effect | Marketing research |
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