Yes. A 20-year holding period does not guarantee that you will make money. An individual company’s shares can lose most or all of their value, and broad stock markets can take many years to recover from a severe decline. Historically, long-term stock investors have generally earned positive returns, but that is a tendency—not a promise about any particular 20-year period.
How can a 20-year stock investment lose money?
A single company can fail
A stock represents an ownership stake in one business. If that business falters or fails, its shares may lose most or all of their value. In liquidation, common shareholders rank behind creditors and preferred shareholders, so they may receive nothing. The SEC puts it plainly: “There’s no guarantee that the company whose stock you hold will grow and do well, so you can lose money you invest in stocks.” SEC Investor.gov: Stocks – FAQs
A broad market can decline for a long time
Owning many stocks rather than one company reduces dependence on any single business, but it does not eliminate the risk of a market-wide fall. The SEC gives a stark U.S. historical example: investors who put all their money into the stock market at its 1929 peak waited over 20 years for the market to return to the same level. That is an illustration of one episode, not a measure of how often diversified portfolios lose over 20-year periods, and it does not specify an inflation-adjusted, dividend-reinvested result. SEC, Saving and Investing
What does “lose money” mean?
The answer depends partly on which return you mean. A stock or index can fall in quoted price while paying dividends; a return calculation that includes reinvested dividends may therefore differ from one that tracks price alone. Inflation also changes what the money can buy. When reviewing performance, check how it was calculated and whether dividends are included; the SEC discusses these distinctions in its performance guidance for funds.
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Your personal outcome also depends on when you invested and whether you made contributions over time. The SEC’s 1929 example contrasts investing everything at the peak with continuing to add money during the subsequent years: additional purchases at lower prices could have produced gains over a longer holding period. That does not make regular investing a guarantee; it means the timing and amount of contributions affect the result.
Does investing for 20 years make a loss unlikely?
A longer horizon gives an investment more time to recover from short-term falls, and the SEC says investors who stay in stocks for long periods—using 15 years as an example—have generally been rewarded with strong positive returns. But it also cautions that stocks can lose money and carry no guarantee. Historical experience can help put volatility in context; it cannot ensure that the next 20 years, or your particular 20 years, will end in profit. SEC Investor.gov: Stocks – FAQs
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The SEC also says large-company stocks as a group have lost money on average about one out of every three years. That figure describes annual outcomes, not the probability that a 20-year investment ends at a loss. The cited SEC materials do not establish a specific loss probability for a diversified portfolio held for exactly 20 years under a defined return method.
How investment choices change the risk
| Investment approach | Main exposure | What diversification can and cannot do |
|---|---|---|
| Shares in one company | Company-specific problems can sharply reduce the investment or wipe it out. | There is little or no diversification across companies. |
| Broad stock fund | Many companies may reduce reliance on any one business, but the fund remains exposed to stock-market declines. | Diversification spreads risk; it cannot guarantee a positive return or prevent a broad fall. |
| Stock-and-bond portfolio | Results depend on the mix of assets, as well as on market movements and the investor’s time horizon. | Different asset types can provide a different risk profile, but no mix is guaranteed to avoid losses. |
The SEC explains diversification and asset allocation as ways to manage risk, not as promises against loss. A suitable mix depends on an investor’s circumstances and time horizon; these general principles do not identify a product that will guarantee a 20-year gain. SEC Investor.gov: Diversify Your Investments
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Fees can reduce what remains after 20 years
Investment performance is not the only factor: ongoing fees reduce the amount left to grow. In a hypothetical example published by the SEC on July 23, 2025, a $100,000 portfolio earning 4% annually for 20 years ended at approximately:
| Annual fee in the SEC example | Approximate ending value |
|---|---|
| 0.25% | $208,000 |
| 0.50% | $198,000 |
| 1.00% | $179,000 |
These are hypothetical figures, not forecasts: the example assumes a steady 4% annual return and illustrates the effect of fees. Actual returns vary. SEC Investor.gov: Understanding Fees
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What to check before relying on a 20-year horizon
- What you own: A single stock has concentrated company risk; a diversified fund spreads exposure but retains market risk.
- When you need the money: If you must sell on a particular date, you may have to accept the market value at that time rather than wait for a recovery.
- How returns are measured: Check whether figures include dividends and whether they are adjusted for inflation.
- What you pay: Fees reduce long-term results, even when an investment earns a positive return before costs.
- How you invest over time: Contributions made at different prices affect the outcome; historical examples do not promise what future contributions will earn.
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