The CAGR Formula
CAGR = (Ending Value ÷ Starting Value)^(1 ÷ Years) − 1
Why CAGR Is the Standard Metric
Compound Annual Growth Rate smooths out year-to-year volatility into a single, standardized annual rate — making it possible to fairly compare investments held over different time periods or with very different volatility patterns. A simple total return percentage doesn't account for how long it took to achieve that return, which CAGR corrects for.
CAGR vs. Actual Year-to-Year Returns
CAGR represents a smoothed, hypothetical constant annual rate — it doesn't mean your investment grew by exactly that percentage every single year. Real investments typically have some years of higher gains and some of losses, which average out to the CAGR over the full period.
Common Uses
- Comparing the performance of different stocks, funds, or portfolios over the same or different time periods
- Evaluating your own portfolio's historical performance
- Projecting future growth using a reasonable estimated CAGR based on historical data