Calmar ratio is a risk-adjusted performance metric that compares your compound annual growth rate (CAGR) to your maximum drawdown. Named after its creator, California Managed Accounts Reports, it answers a practical question: “How many years of returns could my worst drawdown wipe out?” It’s particularly useful for traders who care more about drawdown than volatility.
- Calmar Ratio = CAGR / |Maximum Drawdown|
- Above 1.0 is acceptable; above 2.0 is good; above 3.0 is excellent
- More intuitive than Sharpe for traders focused on drawdown risk
How Calmar Ratio Works
Calmar ratio expresses your annual returns as a multiple of your maximum drawdown. Higher is better—it means your returns justify the pain of your worst period.
Calmar Ratio = CAGR / |Maximum Drawdown|
Both CAGR and drawdown should be calculated over the same period, typically 3 years.
Quick Reference
| Calmar Ratio | Interpretation | Drawdown Recovery |
|---|---|---|
| Below 0.5 | Poor | MDD > 2 years returns |
| 0.5 to 1.0 | Marginal | MDD = 1-2 years returns |
| 1.0 to 2.0 | Good | MDD = 6-12 months returns |
| 2.0 to 3.0 | Very Good | MDD = 4-6 months returns |
| Above 3.0 | Excellent | MDD < 4 months returns |
Example Calculation
3-Year Trading Performance:
- Starting Balance: $50,000
- Ending Balance: $91,125
- Maximum Drawdown: $12,000 (peak: $72,000, trough: $60,000)
Step 1: Calculate CAGR
CAGR = ($91,125/$50,000)^(1/3) - 1 = 22.1%
Step 2: Calculate MDD as Percentage
MDD = $12,000 / $72,000 = 16.7%
Step 3: Calculate Calmar Ratio
Calmar = 22.1% / 16.7% = 1.32
Your Calmar ratio is 1.32—your worst drawdown equals about 9 months of average returns.
Calmar ratio measures CAGR divided by maximum drawdown. A ratio of 2.0 means your annual returns are twice your worst drawdown. Above 1.0 is acceptable, above 2.0 is good, and above 3.0 is excellent. It shows return per unit of drawdown risk.
Calmar vs Sharpe: Which to Use?
| Feature | Calmar Ratio | Sharpe Ratio |
|---|---|---|
| Risk Measure | Maximum Drawdown | Standard Deviation |
| Penalizes | Only the worst decline | All volatility |
| Intuition | ”Years of returns at risk" | "Return per unit of volatility” |
| Best For | Drawdown-focused traders | Volatility-focused analysis |
When to Use Calmar:
- You care more about worst-case than average volatility
- Your strategy has asymmetric returns (big wins, small losses)
- You want to understand drawdown risk in practical terms
When to Use Sharpe:
- Comparing to other managers/funds (industry standard)
- You want to penalize all volatility equally
- Your returns are roughly symmetric
Calmar Ratio Examples
| Strategy | CAGR | Max DD | Calmar | Interpretation |
|---|---|---|---|---|
| A | 30% | 40% | 0.75 | MDD wipes 16 months of returns |
| B | 18% | 12% | 1.50 | MDD equals 8 months of returns |
| C | 25% | 8% | 3.12 | MDD equals 3.8 months of returns |
Strategy C is best on risk-adjusted basis despite lower returns than A. Strategy A’s high returns don’t compensate for its brutal drawdowns.
Improving Your Calmar Ratio
Increase CAGR (Numerator):
- Better trade selection
- Let winners run
- Trade higher-probability setups
Decrease Maximum Drawdown (Denominator):
- Tighter position sizing
- Faster stop losses
- Reduce correlated positions
- Scale down during losing streaks
Reducing drawdown is usually easier and more reliable than increasing returns.
Common Mistakes
-
Using different time periods – CAGR and MDD must cover the same period. 3-year CAGR with 1-year MDD is meaningless.
-
Too short a lookback – 6 months may not capture your true max drawdown. Use at least 2-3 years.
-
Ignoring market conditions – A 2.5 Calmar during a bull market may drop to 0.5 in a bear market. Understand the context.
-
Comparing across strategies – Mean reversion strategies often have higher Calmar than trend following. Compare within strategy types.
How JournalPlus Tracks Calmar Ratio
JournalPlus calculates your Calmar ratio over various time periods, showing how it evolves as your track record grows. You can compare Calmar to Sharpe and Sortino ratios side by side, giving you a complete picture of risk-adjusted performance from multiple angles.
