Drawdown

Drawdown is a fundamental performance metric in trading that measures the magnitude of loss from a portfolio's highest recorded value to its subsequent lowest point before a new high is achieved. It is expressed as a percentage and serves as the primary indicator of risk embedded within any trading strategy. Every trading account experiences drawdowns — they are as unavoidable as losing streaks and are in fact a direct product of them. A trader who begins with $10,000, grows to $15,000, and then sees their account fall to $12,000 before recovering has experienced a drawdown of 20% from peak. The drawdown period only ends when the account surpasses the previous peak of $15,000. Drawdowns matter for two distinct but interconnected reasons. First, they determine the psychological burden placed on a trader. A 10% drawdown is manageable for most disciplined practitioners. A 30% drawdown creates significant stress and increases the temptation to abandon sound risk rules. A 50% drawdown requires a 100% gain to recover and is effectively account-ending for many traders. Second, drawdown serves as the primary measure of strategy risk. Two strategies might achieve the same annual return, but a strategy that does so with a maximum 15% drawdown is dramatically preferable to one with a 40% drawdown because it delivers that return with far less psychological difficulty and capital vulnerability. Drawdown management is therefore an active practice, not a passive observation. Traders use predefined rules — such as reducing position size when drawdown reaches 10% or pausing trading at 20% — to prevent drawdowns from compounding into unrecoverable losses. Monitoring drawdown alongside returns gives a complete picture of strategy health over time.