The Calmar ratio is return earned per unit of worst-case drawdown.
What it is
The Calmar Ratio measures how much return a strategy earns per unit of its worst historical loss. It divides the annualized (compound) rate of return by the absolute value of the maximum drawdown, conventionally measured over the trailing 36 months. It was introduced by Terry W. Young in 1991 to evaluate commodity trading advisors and managed-futures funds, where surviving the deepest decline matters more than return volatility. Higher is better, since it means more reward for the deepest pain endured.
Why it matters
Unlike the Sharpe ratio, which penalizes all volatility, the Calmar Ratio focuses only on the single worst drawdown, which is closer to how real investors actually experience risk and decide whether to abandon a position. The pitfall: it hinges on one extreme event, so a fund that simply has not yet hit its worst loss can show a flatteringly high ratio, and the number swings sharply as a large drawdown enters or exits the lookback window. Always confirm the period used and never compare ratios computed over different windows.
How it's calculated
Compute the annualized (compound) return of the strategy over the chosen period, conventionally the trailing 36 months. Separately find the maximum drawdown, the largest peak-to-trough percentage decline in cumulative value, and take its absolute value. Divide annualized return by that absolute maximum drawdown to get the ratio.
How Quintarthai uses it
Use the Knowledge Base alongside related risk pages like maximum drawdown and the Sharpe ratio to interpret a strategy's reward-per-worst-loss, then review a name's history and risk profile on its deep-analysis page at /app/.
Cross-border note. The Calmar Ratio is a unit-free, currency-agnostic measure, so it applies identically to Canadian (TSX) and US-listed strategies. When comparing a Canadian fund to a US one, compute returns in a single common currency first, because exchange-rate swings can manufacture or hide drawdowns and distort the comparison.
FAQ
What counts as a good Calmar Ratio?
There is no universal threshold, but in managed futures a ratio above roughly 1 is often viewed as solid and above 3 as strong, meaning annualized return exceeds the worst drawdown. Because it leans on one extreme event, treat any single figure as a rough guide and compare only ratios computed over the same window.
How is the Calmar Ratio different from the Sharpe Ratio?
Sharpe divides excess return by the standard deviation of all returns, penalizing both upside and downside volatility. Calmar divides return only by the maximum drawdown, so it ignores day-to-day choppiness and focuses on the single deepest decline an investor would have had to endure.
Check your understanding
Fund A returns 12% annualized over the last 36 months with a maximum drawdown of -24%. Fund B returns 9% annualized with a maximum drawdown of -12%. Which fund has the higher Calmar Ratio?
Fund A's Calmar is 12 ÷ 24 = 0.5, while Fund B's is 9 ÷ 12 = 0.75. Despite a lower return, Fund B earns more per unit of its worst drawdown, so it has the higher Calmar Ratio.