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A record high is a milestone, not a reliable signal that stocks are about to rise or fall. Vanguard’s historical S&P analysis found average returns were slightly higher after record highs over one, three and five years, but lower over ten and twenty years. Those averages conceal a wide range of outcomes, including losses and severe drawdowns. For long-term investors, the useful response is to follow a portfolio plan suited to their goals and risk capacity—not to treat the record itself as a forecast.
What does a record high tell you?
An all-time high means an index’s price has reached a new peak in its recorded history. It describes where the market has been; by itself, it does not predict its next move. A market can set a record and continue rising, or fall afterward. The milestone alone cannot tell you which will happen.
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In its analysis, Vanguard found that all-time-high days accounted for less than 10% of trading days in the historical sample. Their rarity does not make them a dependable warning of an imminent decline.
How did returns compare after record highs?
Vanguard’s Investment Advisory Research Center compared average cumulative S&P price returns after all-time-high days with returns after other days. The figures below cover historical data through September 24, 2025; they are averages, not forecasts or promised investor returns.
| Holding period | After all-time-high days | After other days |
|---|---|---|
| 1 year | 9.5% | 9.2% |
| 3 years | 30.2% | 28.5% |
| 5 years | 55.8% | 51.9% |
| 10 years | 108.8% | 121.8% |
| 20 years | 243.1% | 348.8% |
The comparison favored highs over other days at one, three and five years, by modest margins. At ten and twenty years, the averages after other days were higher. That mixed pattern does not establish that either buying on a record day or waiting for another entry point will produce a better result in the future.
Why averages do not remove the risk of loss
An average summarizes many historical outcomes; it does not describe every path an investor experienced. Vanguard notes that negative returns and drawdowns exceeding 40% occurred in the historical record whether the market began at an all-time high or not. A favorable average over a particular horizon does not rule out a steep decline along the way, or a loss over an investor’s own holding period.
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The study also measured an index, not a personal account. Its historical series uses S&P 90 price returns from January 3, 1950, through March 3, 1957, and S&P 500 Index price returns from March 4, 1957, through September 24, 2025. Price returns exclude dividends, and an index cannot be invested in directly; an investor’s results depend on their holdings, costs, timing and other factors. Vanguard cautions that past performance does not guarantee future returns. See the Vanguard analysis for its methodology and caveats.
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A record alone is not a sound reason to change a long-term investment plan. Vanguard’s guidance is that market timing based on all-time highs or high valuations is particularly challenging, especially over short-to-intermediate horizons. The study does not quantify what an investor might gain or lose by waiting for a pullback, so it cannot establish that waiting is safer or more profitable.
Instead, judge a decision against your own plan:
- Time horizon: Consider when you will need the money. A long horizon does not eliminate risk, but it changes the period over which you are investing.
- Risk capacity: Choose an investment mix you could stick with through a substantial decline, rather than one based on the day’s headline.
- Portfolio policy: Use your strategic allocation and rebalancing rules as the basis for action. Avoid switching tactically just because an index has set a record.
This is general information, not an individual allocation recommendation. A portfolio decision should reflect your circumstances, not a single index milestone.
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