Max drawdown: what it measures and how to read it

Max drawdown (MDD) is the largest fall from a running peak to a later low, in percent of the peak. It is the loss you would have had to sit through at the worst moment, which makes it the most practical risk number for deciding whether you could actually hold a strategy.

Formula

MDD = min over time of (value ÷ highest value so far − 1)

Worked example from a re-run backtest

Mega-Cap Price Acceleration and Quality Engine had a max drawdown of -14.0%: a $10,000 account at its peak would have fallen to about $8,597 at the worst point. Getting back to the peak from there takes a 16.3% gain, which is why deep drawdowns are so much harder to recover from than they look.

Across the re-run strategies

Across 27 re-run strategies the max drawdown ranges from 14.0% to 66.8%, median 27.0%.

Max drawdown →CAGR ↑0%67%52%

Each dot is one strategy: further left is a shallower worst fall, higher up is a higher annual rate. The upper-left corner is where return came with the least drawdown.

Top strategies on this measure

Low-drawdown strategies — full table

Guide: max drawdown in trading bots

Other metrics

Frequently asked questions

How is Max drawdown calculated?

MDD = min over time of (value ÷ highest value so far − 1)

What is a worked example of Max drawdown?

Mega-Cap Price Acceleration and Quality Engine had a max drawdown of -14.0%: a $10,000 account at its peak would have fallen to about $8,597 at the worst point. Getting back to the peak from there takes a 16.3% gain, which is why deep drawdowns are so much harder to recover from than they look.

What Max drawdown do these strategies have?

Across 27 re-run strategies the max drawdown ranges from 14.0% to 66.8%, median 27.0%.

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Disclosure. Backtests are hypothetical simulations on historical data. They do not include every real-world cost, are not live results, and do not guarantee future returns. Educational research only, not investment advice.