Every rolling holding period since March 1957 — best, worst, average and inflation-adjusted, with dividends reinvested. The reference table below is regenerated from the underlying monthly data; quote any figure with attribution.
Coverage Mar 1957 – Jun 2026Span 69.3 yearsUpdated 2026-08-21
10.8% / yr
Nominal return since 1957
A £1,000 lump sum in March 1957 grew to £1,209,114 by Jun 2026 with dividends reinvested — about 1209× your money.
6.9% / yr
Real return (after US inflation)
In today's spending power the same £1,000 became £99,628 (99.6×). Real return is the honest measure of how much wealth actually grew.
100%
of 20-year periods positive
Every rolling 20-year window since 1957 made money even after inflation (worst 0.3%/yr real). The worst 30-year run still returned 4.2%/yr real.
Cite this page
CalculatorDashboard.com, “S&P 500 Rolling Returns Since 1957,” 2026-08-21. https://www.calculatordashboard.com/sp500-rolling-returns/
Rolling annualised returns by holding period
Nominal (dividends reinvested)
Mar 1957 – Jun 2026
Holding period
Worst
Average
Median
Best
% positive
Periods
1 year
-40.9%
12.0%
13.4%
60.2%
78%
821
3 years
-15.1%
10.9%
11.4%
32.5%
88%
797
5 years
-5.8%
10.6%
11.4%
29.7%
92%
773
10 years
-3.5%
10.3%
10.4%
19.3%
97%
713
15 years
3.8%
10.2%
9.9%
19.3%
100%
653
20 years
5.1%
10.3%
9.7%
17.9%
100%
593
30 years
9.3%
11.0%
10.7%
14.3%
100%
473
Real — inflation-adjusted (US CPI)
Mar 1957 – Jun 2026
Holding period
Worst
Average
Median
Best
% positive
Periods
1 year
-41.2%
8.1%
9.4%
56.3%
72%
821
3 years
-17.1%
7.0%
8.1%
29.5%
79%
797
5 years
-9.0%
6.7%
7.7%
25.7%
76%
773
10 years
-5.9%
6.3%
6.9%
16.1%
82%
713
15 years
-2.0%
6.1%
6.7%
15.6%
93%
653
20 years
0.3%
6.1%
5.8%
13.6%
100%
593
30 years
4.2%
6.8%
7.2%
8.9%
100%
473
What the rolling-returns data shows
An average return hides the thing that actually decides investor outcomes: when you bought and how long you held. Rolling returns fix that. For each holding period below we take every possible start month since March 1957, compound the S&P 500's total return (dividends reinvested) over that window, and annualise it. The result is the full distribution of what really happened — not one smoothed number.
Three patterns stand out:
Time compresses the range. One-year returns ran from -40.9% to +60.2%. Stretch to 30 years and every window landed between +9.3% and +14.3% a year.
Long holds were reliably positive. 97% of 10-year periods and 100% of 20- and 30-year periods made money in nominal terms; every 20-year period was positive even after inflation.
Inflation is the real test. The worst real 10-year run lost about -5.9% a year (a start near the 2000 peak), yet the worst real 30-year run still compounded at 4.2% a year.
The classic "bad timing" case: a lump sum at the 2000 peak
Investing right before a crash is the scenario people fear most. A £1,000 lump sum placed in the S&P 500 at the start of 2000 — immediately before the dot-com collapse, and holding through 2008 as well — was still worth about £8,372 by Jun 2026 (8.4× your money, with dividends reinvested), and about £4,191 after inflation, over 26.5 years. The smooth headline hides two brutal drawdowns along the way, which is exactly why holding period matters more than entry point.
Data sources & methodology
This dataset is computed from the sources below. Figures are total returns with dividends reinvested; real (inflation-adjusted) figures use the US CPI deflator in the Shiller series. Percentages are currency-neutral; any £ amount is illustrative and excludes the US-dollar to pound exchange rate.
What is the average rolling return of the S&P 500?
Since March 1957 the S&P 500 has returned about 10.8% a year with dividends reinvested, or roughly 6.9% a year after US inflation. Averaged across every rolling 10-year window, the mean annualised return is 10.3% nominal (6.3% real).
Has the S&P 500 ever lost money over 20 years?
No. Every rolling 20-year holding period since 1957 has been positive, even after inflation — the worst returned about 0.3% a year in real terms. Over 10 years, 97% of periods were positive; the worst real 10-year run lost about -5.9% a year, starting near the 2000 market peak.
What was the worst 30-year period for the S&P 500?
Across every rolling 30-year window since 1957, the weakest still returned about 9.3% a year nominal and 4.2% a year after inflation — all 30-year periods were positive.
Disclaimer: This is a factual historical dataset for information and education, not financial advice or a forecast. Past performance is not a guide to future returns. Figures use the S&P 500 total-return series (dividends reinvested) from March 1957; real figures are deflated by US CPI. Returns shown are currency-neutral percentages — any £ amount is illustrative and ignores platform and fund fees, taxes, and the US-dollar to pound exchange rate that affects UK investors. Always consult a qualified, regulated financial adviser before investing. CalculatorDashboard.com is not regulated by the FCA.