Women Investors Often Make Fewer Costly Mistakes

The strongest evidence shows women often make fewer of the mistakes that hurt long-term returns. Brad Barber and Terrance Odean’s classic study, Boys Will Be Boys, found that men traded 45% more than women. Trading reduced men’s net returns by 2.65 percentage points a year, compared with 1.72 percentage points for women. The explanation was behavioral. Men were overconfident about their ability to pick stocks and time trades. That confidence showed up as movement, and movement showed up as costs.

Fidelity’s 2024 Women And Investing Study adds more evidence finding women less likely than men to describe themselves as aggressive investors and to say they would sell investments and would pull out of the market during volatility. Wells Fargo Advisors’ women and investing research found female-led accounts had less volatility than men’s returns and earn higher risk adjusted returns.

The careful claim is that women appear better on four easy-to-discern measures: they trade less, churn less, pay fewer trading-related costs, and show less overconfident market timing. That matters because every unnecessary trade creates a chance to buy high, sell low, and pay costs along the way. Over decades, those costs compound against savers.

Women Own Less Stock For Because They Live Women’s Lives

Single women are less likely to participate in the stock market than single men. When they do participate, they hold a smaller share of their portfolio in risky assets. The fact is often interpreted as women wanting less risk than men because of women’s natures. A 2012 paper is widely cited for finding women invested less in a standard risky investment game and appeared more financially risk averse than men.

But risk aversion differences between women and men is not the story.

Annika Bacher’s recent “The Gender Investment Gap Over The Life Cycle,” studies U.S. households and her model allows single men and single women to differ in income profiles, household size, marriage and divorce probabilities, survival risk, and medical expenses. But it holds their underlying preferences the same. The model’s power is that it reproduces the gender investment gap without assuming women are naturally more risk averse.

Bacher concludes women hold less stock because their economic circumstances make less stock the rational choice.

Women have lower and different income profiles. Women are more likely to anticipate larger household responsibilities. Women have less wealth early in life. Women face different future consumption needs. When someone has lower income, more demands on that income, and less room for error, taking less financial risk is not cowardice.

And, crucially, since women are more likely than men to anticipate more volatile future income (women are paid less and more prone to reduce labor hours to care for people) they don’t have the capacity to take long-term investment risk. After all, a stable, rising labor income stream can function like a bond in a household’s overall balance sheet. It makes it safer to take equity risk in financial assets. When that income stream is smaller, less secure, or more burdened by caregiving obligations, the optimal portfolio tilts toward safety.

Women have less stock because of arithmetic not gender.

The Stock Investment Gap Compounds And Hurts Wealth

Suppose two workers each save $10,000 at age 30. One can afford risk and invests 50% in stocks at 7% and 50% in safe assets at 3%. By age 65, they have about $67,000.

The other, with lower income and more household demands, invests 20% in stocks and 80% in safe assets. By age 65, they have about $43,000.

The $24,000 gap is not about intelligence or courage. It is the equity premium compounding over time.

The irony is sharp. Women may trade better once they are in the market. But many women are kept at the edge of the market by the conditions of their lives.

Couples Create Some Women’s Financial Risk

Scholars often compare single men and single women because it gives a cleaner comparison. But most people spend much of their adult lives in couples. That creates a problem for any claim about “men’s” portfolios and “women’s” portfolios.

Couples do not always behave like one rational investor because of gender power dynamics and this can lower wealth for the couple and the wife. A comprehensive study of over 1 million Americans found that couples often fail to allocate retirement contributions to the spouse with the highest employer match but instead to the spouse with the highest income. Households leave free money on the table.

A RAND and Department of Labor study, “Household Retirement Saving,” finds retirement assets and contributions are more likely to be located in the husband’s account often because he is the primary earner.

If the husband earns more, and he often does, his account gets more. If his account gets more, he has more formal control. If he has more formal control, household wealth may not translate into equal security. A woman may live in a household with retirement assets and still face weaker bargaining power, greater risk after divorce, or lower security in widowhood.

Debt Pushes Women Further From Investments

Taking on debt makes saving for retirement harder. Women carry a disproportionate share of student debt — women pay the same tuition but earn less to pay it back. Women hold almost two-thirds of U.S. student loan debt, graduate with an average of $2,700 more debt than men with bachelor’s degrees, and take about two years longer to repay.

People With Women’s Lives Find Investing and Wealth Accumulation Hard

The popular story says women are cautious because women are women. The explanation is easy and politically convenient. If women’s lower stock ownership is just a preference, no one has to change wages, caregiving policy, pensions, debt, or household power.

But if women invest less in stocks because they earn less, carry more household responsibility, face more debt stress, and have less wealth early in life, then the policy question changes.

Policies To Make Everyone A Better Investor

The wrong lesson is that women need confidence training so they will buy more stocks. The right lesson is that women need the economic conditions that make long-term investment sensible.

That means closing the gender pay gap. It means subsidizing care. It means giving caregiver credits in Social Security and retirement plans. It means designing retirement accounts that do not assume every worker has stable earnings, no debt, no caregiving shocks, and a spouse who optimizes the household balance sheet. It means helping couples allocate contributions efficiently without burying assets in the higher earner’s account by default.

Women investors often do many things right. They trade less. They churn less. They pay fewer trading costs. They are less likely to perform confidence at the expense of returns. But women also own less stock because they face lower income, higher obligations, more debt pressure, and less secure claims on household wealth.

The gender investment gap is not a story about women being too cautious. It is a story about a financial system that mistakes constraint for preference and then calls the result choice.

The policy answer is to build a retirement system that gives everyone access to a balanced, safe, low-cost, professionally managed portfolio. Women are more likely to face unstable earnings, caregiving demands, and little room for error. But the policy is for everyone living those risks.