Why 95% of Investors Can’t Beat the S&P 500 (and What Actually Helps)
Charlie Munger put the odds at roughly 95% against. The data on professionals and individuals points the same way. The reasons are structural, and most of them can be fixed.
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Can Retail Investors Beat the Market? What the Evidence Shows
Some individual investors beat the S&P 500; most don’t. Here is the research on how individuals actually do, what 144 real self-directed portfolios look like, and the advantages small investors have over fund managers.
Key takeaways
- Some can, most don’t. In a study of 66,465 US households, the most active traders earned 11.4% a year while the market returned 17.9%; trading and timing, not stock choice, drove most of the gap.
- The gap persists: the average dollar in US funds earned 8.7% a year over the 10 years to 2025 against 9.9% for the funds themselves (Morningstar Mind the Gap 2026).
- Professionals don’t do better on average: 79% of active large-cap US funds trailed the S&P 500 in 2025 (SPIVA).
- Self-directed portfolios are concentrated: in 144 portfolios analyzed by Exent, the median top five holdings were 77.2% of the portfolio, which widens the range of outcomes in both directions.
- Small investors have real advantages (no career risk, no benchmark to hug, patience, tax control) and real handicaps (time, information, emotions).
Can a retail investor beat the market?
Yes, some do in any given period, but the average individual investor trails the market, mostly because of trading and timing. The best-known evidence is “Trading Is Hazardous to Your Wealth” (Barber and Odean, Journal of Finance, 2000). It followed 66,465 households at a large US discount broker from 1991 to 1996. The average household earned 16.4% a year and turned over about 75% of its portfolio annually. The most active traders earned 11.4%, while the market returned 17.9%.
Newer data shows the same timing problem in fund investors. Morningstar’s Mind the Gap 2026 study found that over the 10 years to Dec 31, 2025, the average dollar in US mutual funds and ETFs earned 8.7% a year, while the funds returned 9.9%. Investors bought after gains and sold after losses often enough to give up 1.2 points a year.
Do individual investors beat the S&P 500?
On average, no. The main studies point the same way, for individuals and for professionals:
| Study | Who | Period | Finding |
|---|---|---|---|
| Barber and Odean (2000) | 66,465 US households | 1991–1996 | Most active traders 11.4% a year vs 17.9% for the market |
| Morningstar Mind the Gap 2026 | Investors in US funds and ETFs | 10 years to 2025 | Investor return 8.7% a year vs 9.9% fund return |
| SPIVA U.S. Year-End 2025 | Active large-cap US funds | 2025 | 79% trailed the S&P 500 |
| SPIVA Persistence Year-End 2025 | Top-half large-cap funds | 2021–2025 | 4.5% stayed top-half every year (6.25% by chance) |
Stock picking also starts from difficult odds. Among today’s 500 largest US stocks, only about 36% beat the S&P 500 over the 10 years to Sep 30, 2026, and that figure is flattered by survivorship bias; see how many stocks beat the S&P 500. A portfolio of 15 stocks needs several of the rare big winners just to keep up.
What do self-directed portfolios actually look like?
Concentrated, and tilted toward the same popular stocks. The figures below are medians across 144 anonymized portfolios analyzed by Exent, with data as of Sep 30, 2026.
| Measure (144 portfolios) | Value |
|---|---|
| Median number of holdings | 15 |
| Median weight of the largest holding | 26.1% |
| Median weight of the top five holdings | 77.2% |
| Portfolios with the top five above 50% | 77.1% |
| Median technology weight | 22.6% |
| Portfolios with more than 40% in technology | 28.5% |
| Median weight in ETFs | 20.8% |
| Portfolios holding at least one Magnificent 7 stock | 54.2% |
| Most-held stock | Nvidia, in 30.5% of portfolios |
Concentration cuts both ways. A portfolio with three-quarters of its value in five stocks will not track the index, so it has a real chance of beating it and a real chance of trailing it badly. The question is whether the extra risk was paid for. The full data is in what retail portfolios look like, and the professional comparison in smart money vs retail.
What do individual investors who beat the market have in common?
The research describes habits more than talents. Investors who traded less kept more of the market’s return in Barber and Odean’s data. The Mind the Gap results show that investors who stayed invested through drops captured more of their funds’ returns. Among professionals, the “Best Ideas” research by Cohen, Polk and Silli found managers’ highest-conviction stocks beat the market while the rest of their holdings mostly did not, which supports concentrating on fewer, well-researched ideas.
Put together: fewer trades, fewer but better-researched positions, sizing limits, low costs and the patience to hold through drawdowns. Even then, a few years of outperformance can be luck; see skill vs luck in investment returns and do day traders make money.
What advantages do small investors have over fund managers?
| Advantage | Why it matters | Matching handicap |
|---|---|---|
| No career risk | A fund manager who trails for two years may lose clients or the job; an individual can wait | No one forces discipline either |
| No benchmark to hug | Managers often stay close to the index to avoid standing out; individuals can hold what they believe in | Concentration can go badly wrong |
| Patience | No quarterly reporting or redemptions forcing sales at the bottom | Emotions under stress are personal and strong |
| Small size | Can buy smaller, less-followed companies in meaningful weight | Less research, less access to management |
| Tax control | Chooses when to realize gains and losses, and in which account | Mistakes are also personal and permanent |
The handicaps are as real as the advantages. Individuals have limited time, no research team and no risk manager. The advantages only help if they are used deliberately: a written plan, position limits and a fair benchmark to keep score.
Method and caveats
- Retail sample: 144 portfolios uploaded to Exent by self-directed investors, anonymized and reported only as aggregates. It is not a random sample of US investors and leans toward people who want to check their portfolio.
- Stock odds: the 36% figure covers today’s 500 largest US stocks with 10 years of history; companies that shrank or disappeared are missing, so the true share was likely lower.
- External studies are quoted with their own periods and definitions; the Barber and Odean data ends in 1996, before zero-commission trading.
- None of these results predicts how any individual investor will do.
How to see where your portfolio stands with Exent
- Protect: upload a screenshot of your holdings (or a CSV, Excel, PDF or Google Sheet; no brokerage login) and Exent shows concentration, correlation clusters and 2008, 2020 and 2022 crash replays.
- Grow: Exent compares your portfolio with a risk‑matched benchmark and shows Sharpe, Sortino and drawdown; the what‑if simulator tests a change before you trade.
- Find: Gems, stocks where several of the best‑rated analysts agree, are our hunt for the next big winners; past analyst accuracy, not a promise.
Frequently asked questions
Some do in any period, but the average individual investor trails the market. In Barber and Odean’s study of 66,465 households, the most active traders earned 11.4% a year while the market returned 17.9%.
On average, no. Morningstar found the average dollar in US funds earned 8.7% a year over the 10 years to 2025, against 9.9% for the funds, because of the timing of purchases and sales.
No career risk, no pressure to stay close to a benchmark, the freedom to be patient, the ability to buy smaller companies in meaningful size, and control over when taxes are realized.
Mostly trading too often and buying or selling at the wrong time. Costs, concentration in a few popular stocks and selling during drawdowns explain much of the gap.
Very few do. S&P’s persistence data found only 4.5% of top-half large-cap funds stayed in the top half every year from 2021 to 2025, below what chance alone would produce.
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Educational content, not investment advice. Examples are illustrative; past performance does not guarantee future results.