What is Drawdown?
Drawdown measures the decline from a portfolio's peak value to its lowest point before recovering to a new high. If a portfolio reaches $100,000, drops to $75,000, then recovers, the maximum drawdown is 25%. This metric captures the worst-case loss an investor would have experienced, making it more intuitive than standard deviation for understanding risk.
Drawdown and Recovery
A critical insight is that recovery requires a larger percentage gain than the loss. A 25% drawdown requires a 33% gain to break even. A 50% drawdown requires a 100% gain. This asymmetry means that avoiding large drawdowns is mathematically more important than capturing large gains. The S&P 500's maximum drawdown during the 2008 financial crisis was approximately 57%, requiring a 132% gain to recover.
Key Considerations
Maximum drawdown is a key metric for evaluating investment strategies and fund managers. A strategy with high returns but extreme drawdowns may be unsuitable for investors who cannot tolerate seeing their portfolio halved. Diversification across uncorrelated assets is the primary tool for reducing portfolio drawdowns.