Illustrated example
One smooth rate over a bumpy path
The bumpy line is what happened. CAGR is the smooth line that lands at the same final value.
Illustrative example only, not historical market data.Start here
Key takeaways
- CAGR is not the return you earned every single year.
- It is useful for comparing different assets or time periods on an annual basis.
- It hides volatility, drawdowns, and the order of gains and losses.
- Use CAGR with the chart, final value, and drawdown to get a fuller picture.
Plain-English idea
CAGR means compound annual growth rate. It answers a simple question: if the investment had grown at one steady rate every year, what rate would turn the starting value into the ending value?
Imagine a $10,000 investment becomes $16,105 after five years. It did not necessarily earn the same return every year. It may have gone up, down, sideways, and then recovered. CAGR ignores the wiggles and finds the one steady annual rate that reaches the same ending point.
Why it is useful
CAGR helps make different histories comparable. A total gain of 60% sounds good, but it means something different over 2 years than over 20 years. CAGR converts the result into a yearly pace.
This makes it useful in a what-if calculator because users often compare different start dates, assets, or holding periods. A longer period needs an annualized measure, otherwise a long investment can look better simply because it had more time.
Common mistake
The biggest mistake is treating CAGR as a promise or as a typical year. A fund with a 10% CAGR could have years of +30%, -20%, +5%, and +18%. The CAGR is a summary of the whole path, not a forecast and not a safety measure.
Another mistake is comparing CAGR without checking dividends, fees, inflation, and whether prices are adjusted. Two calculators can show different CAGR values if one includes distributions and another uses raw closing prices.
Going deeper
CAGR uses compounding. The basic formula is ending value divided by starting value, raised to the power of one divided by the number of years, minus one. For example, growing from $10,000 to $16,105 over five years is roughly 10% CAGR because $10,000 compounded at 10% for five years is about $16,105.
Intermediate users should pair CAGR with maximum drawdown and volatility. CAGR tells you the destination. Drawdown and volatility tell you more about the ride.
References