His name was Dave. Brilliant read of the market, genuinely gifted — and completely broke within eight months. He had no drawdown policy. After each losing streak he doubled position size to recover faster. A 22% account drawdown became 54% inside three weeks. The maths of recovery meant he needed a 117% gain just to get back to even. He never did.

The brutal arithmetic of drawdown is what most traders ignore until it is too late. Lose 10% and you need an 11.1% gain to recover. Lose 25% and you need 33.3%. Lose 50% and you need 100%. Every percentage point lost demands a disproportionately larger return to recoup it. This asymmetry is the hidden tax on reckless position sizing.

CONCEPTA drawdown policy is a pre-written rule that forces you to stop trading and reassess before small losses become account-ending ones.
WARNINGIncreasing position size during a losing streak to "recover faster" is the single fastest way to destroy a trading account.
KEY IDEARecovery from drawdown grows exponentially harder — a 50% loss requires a 100% gain just to return to starting equity.

Three frameworks dominate professional money management. Fixed fractional risk means risking a fixed percentage of current equity per trade — typically 1% to 2%. On a $50,000 account at 1% risk, maximum loss per trade is $500. The Kelly Criterion calculates optimal position size as: f = (bp - q) / b, where b is the net odds, p is win probability, and q is loss probability. Most professionals use half-Kelly to reduce variance.

Drawdown vs Recovery Required 10% 20% 30% 40% 50% Drawdown % 0% 25% 50% 75% 100% Drawdown Recovery needed

A practical drawdown policy has three trigger levels. A 10% drawdown triggers a review — reduce position size by 50% and analyse recent trades. A 15% drawdown triggers a mandatory three-day trading halt. A 20% drawdown triggers a full stop: no trading until you have identified the cause, revised your rules, and paper-traded profitably for two weeks. These thresholds are arbitrary only if you do not write them down before you start trading. For deeper reading, the mechanics of drawdown calculation and fixed ratio position sizing are covered thoroughly on Investopedia, and the statistical foundation sits in risk of ruin theory.

The policy only works if it is written before a losing streak begins — emotional traders rewrite rules mid-drawdown, which defeats the entire purpose.

The trader who defines their stopping point in advance is the one still trading five years from now.

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