The Average Investor Earns 3-4% Less Than the Market
The 'behavior gap' between fund returns and investor returns
Dalbar's Quantitative Analysis of Investor Behavior (QAIB) consistently shows that the average equity fund investor earns 3-4 percentage points less per year than the fund itself, because they buy high (after rallies) and sell low (during panics).
What history says
Editorial commentary written by ALAN analysts. Figures cited below are analyst-authored context — they are not derived from the chart above and may reflect different windows or sources.
Over 30 years, a 3.5% annual behavior gap turns a $10M portfolio into $4M less than it could have been. This gap exceeds fees, taxes, and poor fund selection combined.
If an advisor can close even half of the 3.5% behavior gap (1.75%), that alone justifies a 1% advisory fee with a 75bp surplus. Behavioral coaching is the highest-ROI service an advisor provides.
In 2008, the average investor realized returns approximately 7% worse than their funds. In 2020, those who panic-sold missed +75% in 9 months. Stress amplifies behavioral errors.
Measure your own behavior gap by comparing your account's actual money-weighted return to the returns of the funds you held; if a gap appears, close it structurally — automatic contributions, fewer portfolio check-ins during drawdowns, and a rule that any trade waits 48 hours after the impulse.