Step 12
Level: beginner
CAGR measures the average compound annual growth rate, helping to compare performance over periods of different lengths. If measured incorrectly, investors can easily reward lucky decisions and punish correct decisions but encounter an unfavorable environment.
CAGR smoothes the path of results and answers the question: if assets grow uniformly each year, what is the equivalent growth rate? It is useful for long-term comparisons, but does not indicate volatility, drawdown or actual experience along the way. A single return number is not enough to conclude whether a strategy is good or bad.
By knowing where the returns came from, what risks were taken, and whether the results exceeded the benchmark, investors can improve the process instead of just reacting to the final result.
CAGR measures the average compound annual growth rate, helping to compare performance over periods of different lengths.
Measuring performance is not just about showing off results. The goal is to understand whether the strategy worked as expected, whether the risk was worth it, and whether the results came from skill, environment, or luck. A portfolio with high returns but too much risk may not be as good as a more stable portfolio with lower returns and suitable for your goals.
CAGR smoothes the path of results and answers the question: if assets grow uniformly each year, what is the equivalent growth rate? It is useful for long-term comparisons, but does not indicate volatility, drawdown or actual experience along the way.
A performance metric always has a range of uses. CAGR does not indicate drawdown. Sharpe does not see all tail risks. The wrong benchmark leads to wrong conclusions. Attribution requires sufficiently good data. So use multiple complementary metrics instead of finding a single number to represent the entire quality of an investment.
Use CAGR to measure long-term growth, but always read it alongside drawdown and volatility.
During each review period, record the absolute return, return relative to the benchmark, drawdown, volatility and main drivers of performance. This helps you distinguish strategic issues from short-term noise, and detect early when the portfolio deviates from its original goals.
Look at the high CAGR and ignore that the portfolio may have fallen sharply before recovering.
A common mistake is to measure results in the way that is most favorable to the story you want to believe. Serious investors need to accept consistent metrics, appropriate benchmarks, and long enough data. Good measurement does not make the results better, but it makes the lessons clearer.
The average annual compound growth rate of an investment.
The process of returns being reinvested and continuing to compound.
The total increase or decrease over the entire measurement period.
There are measures of absolute returns, risk-adjusted returns, benchmark-relative returns, drawdowns, and return attribution.
Some metrics are used to compare strategies, some are used to understand investor experience, some are used to check risk.
Performance metrics depend on data quality, measurement period length, and benchmark suitability.
Application in performance measurement
A portfolio that grows from 100 million to 161 million in five years has a CAGR of about 10 percent per year, although each year can vary widely.
Risk performance analysis
Look at the high CAGR and ignore that the portfolio may have fallen sharply before recovering. This causes investors to draw the wrong lesson and can increase risks in the next cycle.
Changing the start or end date for better results compromises the integrity of the review.
Inappropriate benchmarking makes a portfolio appear better or worse than it actually is.
Look at the high CAGR and ignore that the portfolio may have fallen sharply before recovering. Returns are only meaningful when accompanied by volatility, drawdown, liquidity and targets.
Exercise 1 - reflection
Get portfolio results in the most recent 12 months and analyze them from a CAGR perspective.
Exercise 2 - case_study
A portfolio that grows from 100 million to 161 million in five years has a CAGR of about 10 percent per year, although each year can vary widely. Identify the correct conclusion, the likely wrong conclusion, and the additional data needed.
Exercise 3 - action_plan
Create a performance review sheet of 5 metrics you will track each quarter.