Drawdown

max drawdownpeak-to-trough declineunderwater period

The peak-to-trough decline in the value of a portfolio or asset, expressed as a percentage. Maximum drawdown measures the largest such decline over a given period.

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Analysis from Apr 2, 2026

What Is a Drawdown?

A drawdown measures how far a portfolio or asset has fallen from its most recent peak before recovering to a new high. If a portfolio was worth $100,000, fell to $70,000, and then recovered, the drawdown was 30%.

Maximum drawdown (MDD) is the largest peak-to-trough loss observed over a full history. It answers the question: "What is the worst I would have experienced if I bought at the worst possible time?"

Why It Matters More Than Volatility

Volatility measures how much prices swing — but drawdown measures pain. A strategy with moderate volatility but a 60% max drawdown is far harder to stick with than a higher-volatility strategy that never drops more than 20%. Investors who abandon strategies at the bottom crystallise losses permanently.

The Mathematics of Recovery

Drawdowns are asymmetric:

A 10% loss requires an 11% gain to recover
A 25% loss requires a 33% gain
A 50% loss requires a 100% gain
A 75% loss requires a 300% gain

This asymmetry is why capital preservation is paramount. The larger the drawdown, the harder and longer the recovery — and the greater the risk that investors give up before it happens.

Drawdown in Portfolio Construction

Risk managers use maximum drawdown alongside Sharpe ratio and Calmar ratio (annual return ÷ max drawdown) to evaluate strategies. A Calmar ratio above 1.0 is considered healthy. Strategies with high Calmar ratios deliver strong returns relative to their worst historical loss.

Frequently Asked Questions

▶What is the difference between maximum drawdown and volatility?

Volatility measures the dispersion of returns in both directions and is expressed as an annualised standard deviation, while maximum drawdown measures only the worst peak-to-trough decline actually experienced by an investor. A strategy can have relatively low volatility yet inflict a devastating drawdown if losses cluster sequentially rather than being distributed randomly over time.

▶How long does it typically take to recover from a large drawdown?

Recovery time scales roughly with the severity of the drawdown due to the asymmetric mathematics of loss and gain — a 50% drawdown requires a 100% gain just to break even, which can take years even in a strongly trending market. The S&P 500 took approximately 5.5 years to recover its October 2007 peak after the financial crisis drawdown of nearly 57%, illustrating that underwater periods can far outlast the initial decline itself.

▶What is a good maximum drawdown for a trading strategy?

There is no universal threshold, but context matters: equity long/short strategies with maximum drawdowns below 20% are generally considered well-controlled, while trend-following or concentrated strategies may have historical MDDs of 30–50% but compensate with high long-run returns. The Calmar ratio — annualised return divided by maximum drawdown — is a more useful benchmark, with values above 1.0 considered acceptable and above 2.0 indicating strong risk-adjusted performance.

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