$10,000 invested in the S&P 500 in 1970

$10,000 put into an S&P 500 index fund in January 1970 would be worth about $3,931,112 by Sep 2026, with dividends reinvested. That is 11.1% a year.

Real monthly S&P 500 data, updated monthly. How we calculate

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$10,000 put into the S&P 500 in Jan 1970 is now worth

$3,949,645

S&P 500 came out on top, 11.5× 10-year Treasury bonds, which reached $342,142. Just keeping up with prices needed $88,619, and both did better. It ends in Aug 2026, the latest month with data for Bonds.

$10,000You put in

11.1%Best per year (S&P 500)

$88,619To match inflation

−49%Deepest drop (S&P 500)

S&P 500BondsKeeping up with inflation

S&P 50011.1%/yr · $3.9M

Bonds6.4%/yr · $342k

Full results by asset

Asset	Worth now	Per year	Total return	Worst drop
S&P 500	$3,949,645	11.1%	39,396%	−49% (Mar 2009)
Bonds	$342,142	6.4%	3,321%	−25% (Oct 2023)

The chart uses a log scale: equal steps up mean equal percentage gains. What each line measures: S&P 500, S&P 500 monthly average level with dividends reinvested (an index fund, before its small fee); Bonds, total return of 10-year US Treasury bonds (interest plus price changes), modelled from the monthly 10-year yield. Inflation uses the US Consumer Price Index. Monthly averages, data through Aug 2026; no fees or taxes. Past returns do not predict future returns.

The result

$3,931,112Worth in Sep 2026

11.1%Yearly return

6.9%/yrAfter inflation

−49%Worst drop on the way

Over 57 years the money doubled about 8.6 times. Without reinvesting dividends it would be $849,232: dividends account for 78% of the final value.

Inflation matters over this long. $10,000 in 1970 had the buying power of about $88,619 today, so the real gain is $3,931,112 against $88,619: still 44.4× the buying power, or 6.9% a year above inflation.

It was not a smooth ride. The value fell 49% from a high around Mar 2009, during the 2008 financial crisis. Holding through it was the price of the final number.

The same $10,000 in other assets from January 1970: 10-year Treasury bonds: $342,142. Compare more assets.

Value over time
After	Year	Worth
5 years	1975	$9,551
10 years	1980	$18,338
20 years	1990	$85,373
30 years	2000	$455,948
40 years	2010	$430,179
50 years	2020	$1,530,419
Now	Sep 2026	$3,931,112

Value over time, with dividends reinvested. No fees or taxes.

Try other amounts and years

$1,000 in 1970 $10,000 in 1970

$10,000 in 1950 $10,000 in 1960 $10,000 in 1965 $10,000 in 1966 $10,000 in 1967 $10,000 in 1968 $10,000 in 1969 $10,000 in 1971 $10,000 in 1972 $10,000 in 1973 $10,000 in 1974 $10,000 in 1975 $10,000 in 1980 $10,000 in 1990 $10,000 in 2000 $10,000 in 2010 $10,000 in 2020

Common questions

How much would $10,000 invested in the S&P 500 in 1970 be worth today?

About $3,931,112 as of Sep 2026, with dividends reinvested and no fees or taxes. Without dividends, about $849,232.

What was the average yearly return since 1970?

11.1% a year before inflation and 6.9% after inflation.

How much is $10,000 from 1970 in today's money?

About $88,619, based on US consumer prices (CPI). See inflation since 1970.

Is a lump sum better than investing monthly?

Historically a lump sum came out ahead about two-thirds of the time, because markets rise more often than they fall. Spreading it out reduces regret if a crash comes right after. Test both with the lump sum vs DCA calculator.

Based on the S&P 500 monthly average level with dividends reinvested (an index fund before its small fee). Educational estimates, not investment advice. Past returns do not predict future returns.

The Weekly Fat Stack · starts January 2027

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