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A record high is a milestone, not a forecast. Historical S&P data analyzed by Vanguard shows that average returns after all-time highs were slightly higher over one, three and five years than after other trading days, but lower over ten and twenty years. Those averages do not predict what happens next or rule out losses. For a long-term investor, the more useful question is whether the current investment plan still fits their time horizon and ability to withstand risk.
What does a stock-market record actually tell you?
An all-time high means an index has reached a higher level than at any earlier point in its measured price history. It describes where prices have been; on its own, it does not signal whether prices will rise or fall next.
A new peak can feel like a warning because a decline may follow any market level. But a record alone is not a reliable short-term warning. In Vanguard’s historical analysis, days at all-time highs made up less than 10% of trading days, yet the rarity of those days did not make them a dependable timing signal.
How did returns compare after all-time highs?
Vanguard Investment Advisory Research Center compared average cumulative S&P price returns after all-time-high trading days with returns after other trading days. The analysis covered data through September 24, 2025. The figures are historical averages, not forecasts or guaranteed 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% |
For the one-, three- and five-year periods, the average in this sample was modestly higher after a record-high day. At ten and twenty years, the averages favored other starting days. The pattern does not establish that buying at a record is better or worse: the comparison changes with the holding period, and averages conceal the range of actual outcomes.
Why the averages do not predict your result
There were losses after both kinds of starting day
Vanguard reports that outcomes varied substantially, including negative returns and drawdowns exceeding 40%, whether the market began at an all-time high or not. A favorable average cannot tell you whether your investment will be profitable over your own holding period.
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The figures measure index price returns
The historical series uses S&P 90 price returns from January 3, 1950 through March 3, 1957, then S&P 500 Index price returns from March 4, 1957 through September 24, 2025. These are index price-return figures, not the realized return of a particular investor’s portfolio. An index is not directly investable, and the figures should not be treated as a projection for a fund, account or individual portfolio. Vanguard’s source provides the methodology and cautions that past performance does not guarantee future returns: Vanguard’s all-time-high analysis.
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A record high by itself is not a reason to abandon a long-term investment plan, just as it is not a guarantee that investing immediately will pay off. Waiting for a pullback may avoid investing before a decline, but it also means remaining out of the market while waiting; the cited analysis does not quantify the cost or benefit of that choice for an individual investor.
Vanguard’s general guidance is to avoid trying to time the market based on all-time highs or high valuations and to stick with a strategic policy portfolio suited to the investor. That is not a personal allocation recommendation. Your decision should reflect your investment horizon, risk capacity and chosen portfolio—not the milestone alone.
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A practical way to respond to a new high
- Check your time horizon. Consider when you will need the money. A short time horizon leaves less time to recover from a downturn than a long one.
- Review your planned portfolio. Confirm that its mix of investments still matches your goals and the level of risk you can tolerate.
- Distinguish a plan from a prediction. If you are considering a change, identify the reason. Reacting solely to a record high is a market-timing decision, not evidence that a decline is imminent.
- Account for uncertainty. Historical averages describe groups of past outcomes. They cannot tell you the next return or prevent losses.
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