Drawdown — Trading Wiki

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Published by TradeHQ. Site creator: Anuga Weerasinghe. This page has no recorded editorial review date; the About page explains the site's editorial approach.

What Drawdown means

The decline from a portfolio's peak value to its lowest point before a new peak. Maximum drawdown measures worst-case historical loss. Critical for risk assessment.

In depth

Drawdown is a risk metric that measures the decline in value from a portfolio's or trading account's peak (highest point) to its subsequent trough (lowest point) before a new peak is established. Expressed as a percentage, it quantifies the worst-case loss experience during a specific time period and is one of the most important measures of investment risk because it directly represents the real-world pain that an investor or trader experiences. Maximum drawdown (MDD) is the largest peak-to-trough decline ever recorded for a particular strategy, fund, or account.

For example, if an account grew from $100,000 to $150,000, then declined to $110,000 before recovering to $160,000, the maximum drawdown was $40,000 / $150,000 = 26.7%. Recovery from drawdowns requires disproportionate gains — a mathematical reality that makes drawdown control critical. A 10% drawdown requires an 11.1% gain to recover. A 20% drawdown requires a 25% gain. A 50% drawdown requires a 100% gain (doubling your money) to return to the previous peak. A 90% drawdown requires a 900% gain. This asymmetric math is why professional risk managers obsess over drawdown control rather than maximizing returns.

In quantitative finance, strategies are often evaluated using the Calmar Ratio (annualized return divided by maximum drawdown), the Sortino Ratio (return divided by downside deviation), or the MAR Ratio (minimum acceptable return versus maximum drawdown).

Key points

• Peak-to-trough decline measuring worst-case loss experience
• 50% drawdown requires 100% gain to recover — math is asymmetric
• Calmar Ratio (return/drawdown) measures risk-adjusted performance

Why it matters when you are learning

Calculate the decline from the relevant peak and state the observation period. Historical maximum drawdown is not an upper bound on future loss, and no universal percentage is a suitable limit for everyone.

Practising Drawdown on the simulator

Use the simulator as an observation exercise for Drawdown. The main feature to identify is: Peak-to-trough decline measuring worst-case loss experience. A second feature to compare is: 50% drawdown requires 100% gain to recover — math is asymmetric. A third feature to note is: Calmar Ratio (return/drawdown) measures risk-adjusted performance. The presence of the concept is not a prediction or a trade signal. Educational simulation only — not financial advice.