What is the gender gap in investing behavior?

The short answer

The gender gap in investing has two distinct dimensions. The first is participation: women invest less than men, even after controlling for income, partly due to lower self-reported confidence and engagement with financial markets. The second is performance: when women do invest, multiple large-sample studies find they outperform men by a small but consistent margin.

The seminal academic study (Barber-Odean, 2001) analyzed over 35,000 U.S. brokerage accounts from 1991-1997 and showed men traded roughly 45% more than women, generating worse risk-adjusted net returns. The gap was largest among single men versus single women, where the trading differential approached 67%.

The result has been replicated repeatedly. Fidelity’s 2021 study of 5.2 million accounts over 2011-2020 found women’s annualized returns exceeded men’s by about 40 basis points. The mechanism most commonly invoked is overconfidence — but the simpler explanation may be that lower confidence produces lower turnover, which produces better outcomes.

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What the data shows

The empirical record on gender differences in investing is unusually consistent across studies and decades.

Key figures (academic and industry sources, 2001-2024):

• Barber-Odean (2001, QJE): men traded 45% more than women in a sample of 35,000+ accounts; men’s net annual returns were roughly 2.65 percentage points lower vs 1.72 for women
• Single men versus single women: trading differential of 67%; net return shortfall of 2.3 percentage points annually
• Fidelity 2021 study, 5.2 million accounts over 2011-2020: women outperformed men by approximately 40 basis points annually
• Wells Fargo data: women trade roughly 27% less frequently than men in shared accounts
• Self-reported confidence (Bank of America, FINRA): only 28% of women say they are very comfortable making investment decisions vs 39% of men
• Warwick Business School analysis of 2,800 U.K. investors: women outperformed men by approximately 1.8 percentage points

The exception worth noting: subsequent experimental work (Cueva et al. 2019) finds that overconfidence may not be the sole driver. Other factors — risk aversion, time preferences, and information acquisition style — also contribute to the gap. The empirical pattern (lower turnover, better returns) is robust; the precise psychological mechanism remains debated.

→ Dataset: S&P 500 Historical Returns

Why it happens — the macro mechanism

The gender gap in investing operates through three documented channels.

Channel 1 — Overconfidence and turnover. Psychological research consistently finds that men display higher overconfidence than women in domains they perceive as masculine, including finance. Higher overconfidence translates into more frequent trading, which generates higher transaction costs and tax friction. Barber and Odean’s 2001 paper concluded that overconfidence-driven turnover was the proximate cause of the male underperformance.

Channel 2 — Risk preferences and asset mix. Surveys consistently document that women hold more cash and fewer equities than men at comparable wealth levels — Female Invest data show 48% of women have stock market investments versus 66% of men. This dampens long-run returns relative to optimal allocations, partially offsetting the trading-discipline advantage.

Channel 3 — Engagement with advice and discipline. Spectrem Group surveys show roughly 61% of women use a financial advisor versus 56% of men, and Fidelity’s 2021 study finds that 86% of women agree professional management makes their lives less stressful. The combination of professional advice and lower turnover compounds into measurable return differences over multi-year horizons.

Synthesis by regime: in late-cycle bull markets (1999-2000, 2020-2021), overconfidence is most punished — men’s higher turnover and concentrated bets in growth stocks generated the largest underperformance during these periods; in crashes and bear markets (2008, March 2020, 2022), women’s higher cash allocations and lower turnover protected capital, generating the gap; in long sideways markets (2012-2014), the differences narrow because turnover penalties are smaller and asset-mix differences contribute more to total return spread.

The gender gap in investment performance is the price men pay for the confidence women never had — and the women’s discount turns out to be worth roughly 40 basis points per year.

→ Framework: Behavioral investing and cognitive biases

What it means for different economic actors

Savers of any gender can apply the documented finding: lower turnover and broader use of professional management correlate with better long-run outcomes. The “women’s portfolio behavior” is not gender-bound — it is a pattern that any investor can adopt.

Investors in self-directed accounts should evaluate their own turnover. Annual turnover above roughly 50% (selling and replacing half the portfolio) historically correlates with significantly worse net returns due to transaction costs and tax friction.

Plan sponsors and advisors can use the finding as evidence for default-driven, low-turnover plan architectures. Target-date funds and broadly diversified index portfolios capture the behavioral benefits without requiring individual restraint.

A common error is to interpret the gender gap as evidence that one gender is “better at” investing than the other. The more accurate framing is that lower turnover and disciplined asset allocation produce better outcomes, and these behaviors are observed more frequently among women in current data — but they are accessible to any investor who adopts them.

Practical observation

Go deeper

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Frequently asked questions

Is overconfidence really the main driver of the gender gap?

It was the original explanation (Barber-Odean 2001), but subsequent experimental work has complicated the picture. Cueva et al. (2019) found that controlling for overconfidence directly does not eliminate the gender difference in trading activity, suggesting other factors — risk preferences, information acquisition style, financial advice usage — also matter. The empirical pattern is robust; the underlying psychological mechanism is multi-causal rather than single-factor.

Does the gender gap appear in non-U.S. markets?

Yes, with consistent direction. A Warwick Business School analysis of 2,800 U.K. investors found women outperformed men by roughly 1.8 percentage points annually — a larger gap than the U.S. evidence. Studies in continental Europe and Asia generally confirm that women trade less and outperform on a risk-adjusted basis, though the magnitude varies. The cross-country consistency strengthens the case that the pattern reflects structural psychological differences rather than U.S.-specific market dynamics.

What practical lessons emerge for any investor?

Three lessons stand out. First, lower turnover historically correlates with better net returns — discipline beats activity over multi-year horizons. Second, professional advice or automated allocation captures most of the behavioral benefit without requiring individual restraint, which is why Fidelity’s 86% figure on women’s preference for professional management aligns with the performance gap. Third, the gap is not biological — it is behavioral. Any investor who adopts low-turnover, disciplined allocation captures the same benefit.

Last updated — 28 July 2026