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Annualized Rate of Return Meaning

The annualized rate of return represents the average annual growth of an investment over a defined period. Rather than simply dividing total growth by the number of years, it uses a geometric mean to account for the effect of compounding. This makes it a more meaningful measure when comparing investments with different durations or cash‑flow patterns because it reflects how gains build upon previous gains.

To calculate an annualized return, you start with the investment’s beginning value and ending value, then determine the total return. The geometric mean is found by taking the nth root of the total growth factor, where n is the number of years. For example, if a fund grows 30 % over three years, the total return factor is 1.30. The annualized return would be the cube root of 1.30 minus one, which shows the equivalent constant yearly rate that would produce the same overall increase.

Because it smooths out year‑to‑year volatility, the annualized rate helps investors compare the long‑term performance of different portfolios or asset classes. It is particularly useful when evaluating mutual funds, exchange‑traded funds and other investments where returns may fluctuate. Financial analysts often use it alongside risk measures to assess whether an investment’s higher return justifies greater volatility.

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