Unit 3 · Level 5 · Quant Foundations
Drawdown math & recovery
Your equity curve's worst peak-to-trough fall is your MAX DRAWDOWN. It predicts two things returns can't: whether the math can recover (League 2's asymmetry) and whether the HUMAN will keep executing. Most system failures are humans abandoning good systems mid-drawdown. Design for the drawdown first; returns follow.
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What you get asked
A system backtests +40%/year with 60% max drawdown. The master's verdict:
Nobody keeps executing through −60%; the paper return is fiction if the pilot ejects. A 20%/year system with 15% drawdown beats it in real life, because it actually gets EXECUTED. Feasible > optimal.
Match the metric to what it judges
Judge systems like a risk manager: pain-adjusted, not headline-adjusted.
Position sizing is the throttle that converts one strategy into ANY drawdown profile: halve the size, roughly halve the ___.
You don't need a new system to suffer less, just a smaller multiplier on the same one. The most underused lever in trading.
Your live system hits its historical max drawdown. The pre-written protocol should say…
Decided in calm, executed in storm. Drawdown protocols are the portfolio version of stop-losses: the exit ramp built BEFORE the crash. Calm-you protects storm-you. Familiar principle, biggest scale.
Why do masters brag about drawdowns more than returns?
Survival is the real flex. 'Never blew up' is the rarest line on any trading résumé. Make it yours. Boss next. 🐜
The rest of this unit
Kelly, volatility drag, drawdown math: the numbers behind every rule you follow.