Dow Jones Industrial Average

The Dow Jones Industrial Average has grown approximately exponential for many decades.

An approximate fit for the period Jan 2018 to Dec 2025 is given by:

$$ \text{DJIA} = 23225e^{0.000331t} \quad\text{with $t$ in days since January 2018} $$

This gives a doubling time of approximately 8 years.

There are also interesting discussions to be had about noticeable drops (Covid) and periods with high average rates of change (bear markets and crashes).

Sources for the data

• DJIA data is copyrighted S&P Dow Jones Indices LLC and cannot be redistributed without permission. It can be easily downloaded at the FRED (Federal Reserve Bank of St. Louis) website at https://fred.stlouisfed.org/series/DJIA