The Cost of Mistakes

The gap between what investors could earn and what they do earn is enormous. The DALBAR Quantitative Analysis of Investor Behavior, run annually since 1994, estimates that the average US equity-fund investor underperforms the funds they own by 2–4% annually. Over a 30-year investment horizon, this gap compounds to a 50–80% reduction in terminal wealth.

Indian data is sparser but the pattern is similar:
- Investors in Indian small-cap funds typically earn 4–6% less than the funds report, due to buying near peaks (2017, late 2021) and selling near troughs (2018-2019, mid-2022).
- ULIPs and endowment policies routinely deliver 4–6% net returns over 20-year horizons against equity MF returns of 11–13% for the same period — a 5–7% annual gap on a comparable risk profile.
- Direct stock investors in India trade ~3.5x per year on average; transaction costs and tax friction reduce gross returns by 1.5–2.5%.

The pattern: most investor underperformance is self-inflicted, not driven by markets or fund selection. Understanding the mistakes is more important than learning the strategies.

This module catalogues the most common, most damaging mistakes — both global and India-specific — and the systems that prevent each one.