What is the Calmar ratio, and how does it compare to the Sharpe ratio for evaluating hedge fund performance?

Question

AcadiFi · Accepted Answer

The **Calmar ratio** (originally named after the California Managed Accounts Reports newsletter) measures risk-adjusted performance by relating annualized return to maximum drawdown rather than to volatility.

**Formula**

**Calmar Ratio = Annualized Return / |Maximum Drawdown|**

Typically calculated over the trailing 36 months (3 years).

**Worked Example**

Hargrove Capital's managed futures fund over 3 years:

- Cumulative return: 38.7%
- Annualized return: (1.387)^{1/3} - 1 = **11.55%**
- Maximum drawdown during the period: **-6.42%**

**Calmar Ratio = 11.55% / 6.42% = 1.80**

**Interpretation Benchmarks**

| Calmar Ratio | Assessment |
|---|---|
| < 0.5 | Poor risk-adjusted returns relative to drawdown |
| 0.5 - 1.0 | Average |
| 1.0 - 2.0 | Good — generating returns well above drawdown risk |
| > 2.0 | Excellent — rare over sustained periods |
| > 3.0 | Exceptional (verify data — may indicate short history or favorable market) |

**Calmar vs Sharpe**

| Dimension | Sharpe Ratio | Calmar Ratio |
|---|---|---|
| Risk measure | Standard deviation (volatility) | Maximum drawdown |
| Sensitivity to tails | Low — treats upside and downside vol equally | **High — focuses on worst-case loss path** |
| Time horizon | Usually annualized from monthly | 3-year trailing window |
| Investor relevance | Appropriate for diversified portfolios | **Better for concentrated strategies and hedge funds** |
| Manipulation resistance | Can be inflated by smoothing returns | Harder to manipulate — one bad drawdown persists |

```mermaid
flowchart TD
    A["Fund A: Sharpe 1.5, Calmar 0.6"] --> B["High return/vol but deep drawdown"]
    C["Fund B: Sharpe 1.1, Calmar 2.0"] --> D["Moderate return/vol but very controlled drawdown"]
    B --> E["Investor with loss-aversion prefers Fund B"]
    D --> E
```

**When to Prefer Calmar:**
- Evaluating CTA/managed futures and absolute return strategies
- Investors with explicit drawdown constraints (pension funds, endowments)
- Strategies with non-normal return distributions where volatility is misleading

**Limitations:**
- Very sensitive to a single extreme event — one bad month can dominate
- Short track records may not contain a meaningful drawdown
- Does not account for drawdown duration (a quick 10% drop and recovery may be more acceptable than a slow 8% grind)

For more on risk-adjusted performance metrics, explore our FRM Part I course materials.

What is the Calmar ratio, and how does it compare to the Sharpe ratio for evaluating hedge fund performance?

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