Glossary/Performance

Annualized Return

Also known as Annualised return, Compound annual return

Annualized return converts an investment result covering more or less than one year into an equivalent yearly compound rate. It allows periods of different lengths to be compared, but it does not show the path, variability, or actual return earned in each calendar year.

Editorially reviewed 2026-07-29

Why annualized return matters

Investment records span unequal periods, making cumulative gains difficult to compare directly. Annualization places them on a common time scale and connects beginning wealth with ending wealth through compounding. It is used in manager reports, forecasts, benchmarks, and long-term planning. Investors need to distinguish a genuinely annualized multi-year result from a simple projection of a short return, which can create an unrealistic impression of repeatability.

How it is applied

For a total return over multiple years, raise ending value divided by beginning value to the inverse of elapsed years and subtract one. Cash flows require time-weighted or money-weighted methods before annualization. Periodic average returns should be geometrically linked rather than multiplied arithmetically. Reports should state whether the result is net of fees, includes income, the exact period, currency, and whether periods shorter than one year were annualized.

Formula

Annualized return = (Ending value / Beginning value)^(1 / years) - 1
Ending value
Value after all compounded investment returns
Beginning value
Initial value before the measured returns
years
Length of the measurement period in years

Portfolio example

An investment grows from $100 to $133.10 over three years. Its annualized return is 10%, because 1.10 compounded three times equals 1.331. It did not necessarily earn 10% in each year; returns might have been 25%, -10%, and about 8.4%. A three-month gain of 5% annualizes to roughly 21.6%, but presenting that projection without context could be misleading.

How to interpret it

Annualized return is the constant compound rate that links start and end values. It is useful for comparison only when periods, fees, cash-flow methods, and currencies are compatible. A higher value says nothing about volatility, drawdown, liquidity, or confidence that the result will repeat. For short histories, cumulative return and actual period dates should appear beside any annualized figure so readers can see how much evidence supports it.

Limitations and common misconceptions

Annualization smooths the path and can conceal severe interim losses. Extrapolating a brief strong period assumes compounding that may be implausible. Arithmetic averaging overstates compound growth when returns fluctuate. External cash flows, stale prices, changing leverage, and survivorship bias can distort results. The measure should be presented with cumulative and calendar returns, volatility, drawdown, benchmark results, fees, and the length of the track record.

Sources and further reading

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