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The Calmar Ratio is a high-performance risk-adjusted return metric closely related to the Sharpe Ratio. However, while the Sharpe Ratio uses standard deviation (overall volatility) as its risk baseline, the Calmar Ratio relies exclusively on Maximum Drawdown. This makes the Calmar Ratio exceptionally popular among hedge fund managers and system developers, as it measures performance directly against the worst-case capital loss scenario.

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The Formula

The Calmar Ratio evaluates a strategy’s rolling performance over a multi-year horizon (historically a 3-year lookback): Calmar Ratio=CAGRMaximum Drawdown\text{Calmar Ratio} = \frac{\text{CAGR}}{\text{Maximum Drawdown}}

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Calmar vs. Sharpe: Which is Better?

  • The Sharpe Limitation: Standard deviation treats upside volatility (sudden massive spikes in profit) exactly the same as downside volatility (sudden drops).
  • The Calmar Edge: The Calmar Ratio looks purely at systemic tail risk. If a portfolio has large price swings but never experiences a deep capital breakdown, its Calmar Ratio will remain highly favorable.
A Calmar Ratio above 2.0 is generally considered excellent, indicating that the strategy’s annualized return is double its worst historical peak-to-trough drop.