“This fund grew 315% over the last ten years.” Sounds like 31.5% a year — except it isn’t. The same ten-year history can honestly be described two ways, and mixing them up is how people end up comparing apples to oranges. This guide shows what each number means, why they differ, and how to read both without fooling yourself.
| What it means | Example | |
|---|---|---|
| Total return | Everything your money grew over the whole period | +315% over 10 years |
| Annualized return | The steady yearly rate that produces the same result | ≈ +15% per year |
Both are true for the same investment. $10,000 growing 15% a year for 10 years compounds to about $40,450 — a gain of about 304%, close to that 315% example (exact figures depend on timing). The point: annualized is not “total divided by years.” 315% ÷ 10 = 31.5% would be wildly wrong, because it ignores compounding.
Because losses hurt more than gains help, the order of good and bad years changes the ending total:
So a single headline number hides whether the ride was a steady climb or a rollercoaster that ended OK. That’s why looking at calendar years side by side — and at the worst drawdown — is worth more than any one average. A 15% annualized with a 35% drawdown and a 15% annualized with an 8% drawdown are not the same investment.
Total return is the full gain over the period (+315% in 10 years); annualized is the steady yearly rate that produces it (≈15%/yr). Use annualized to compare periods of different lengths.
Because returns compound — 31.5% every year would end far above a 315% total. Annualized is the geometric average, not the arithmetic one.
A loss cuts deeper than a gain of the same size: −50% then +50% leaves you down 25%. Different orderings of the same yearly returns can end differently — another reason to look at calendar years.
Related: Maximum drawdown explained · Expense ratio explained