Drawdown and recovery:
why a 50% loss needs a 100% gain.

What a drawdown actually is

A drawdown is the decline from an equity peak to a trough, measured as a percentage. If your account hits $10,000 and then falls to $8,000 before making a new high, you were in a 20% drawdown. It is the single most honest number in trading, because it measures pain rather than promise. Your return tells you how good the good times were; your drawdown tells you how bad the bad times got, and whether you could survive them.

Every trader lives inside a drawdown far more often than they live at a fresh peak. That is normal. The question is never whether you will draw down, it is how deep you let it get, because depth is what decides how hard the climb back becomes.

The recovery asymmetry

Here is the trap that surprises most new traders: a loss and the gain needed to undo it are not symmetric. Lose 20% and you might think a 20% gain puts you back to even. It does not. You lost 20% of the peak, but you have to earn that back off the smaller balance that remains, so the required gain is always larger than the loss.

The formula is exact. To recover from a loss of X percent, you need a gain of X ÷ (1 − X). Lose 20% and you must gain 0.20 ÷ 0.80 = 25% just to get back to where you started. The bigger the loss, the faster that required gain runs away from you.

Read that table slowly. At 50% the gain needed doubles your money just to break even. At 90%, you have to grow what is left tenfold to get back to the peak. A number that took one bad stretch to lose can take years, or a lifetime, to earn back.

Why deep drawdowns are a trap

The required recovery does not grow in a straight line, it grows exponentially. Each additional slice of drawdown costs far more to recover than the last. Going from a 10% loss to a 20% loss roughly doubles the drawdown but more than doubles the effort to recover. Going from 50% to 80% is not a bit worse, it is the difference between doubling your money and quintupling it.

This is exactly why capital preservation matters more than swinging for home runs. Avoiding a 50% drawdown is worth more than landing any single big winner, because the big winner only has to be undone once by a deep loss and you are back to needing a 100% gain. Protecting the downside is not the cautious, unambitious choice. It is the mathematically dominant one.

How small per-trade risk keeps you out of the hole

The lever that controls your drawdown is how much you risk on each trade. Keep per-trade risk small, say 1% of your account, and even a painful losing streak stays shallow. Ten losses in a row at 1% leaves you down roughly 10%, which needs only an 11.1% gain to erase, an ordinary recovery. Push that risk to 10% per trade and the same ten-loss streak drags you toward a 65% drawdown, which now demands a near-tripling of what remains.

Oversizing turns a normal cold streak into a hole you may never climb out of. Small, fixed per-trade risk does the opposite: it caps how deep any streak can take you, so the recovery math always stays on the gentle end of that table. This connects directly to position sizing and to your risk of ruin. Size every trade off a small, fixed fraction of your account and shallow drawdowns become the ceiling, not the exception.

The emotional cost of digging out

The numbers are only half the damage. A deep drawdown is a psychological weight that changes how you trade. Sitting 40% underwater for months, watching the required recovery loom, is exactly the state that produces revenge trades, abandoned plans, and traders who quit at the bottom right before the rebound. The deeper the hole, the longer the climb, and the more time there is for discipline to break.

A shallow drawdown protects your decision-making as much as your balance. When the worst normal stretch only costs you 10%, you can stay calm, keep following the plan, and let the edge play out. That composure is not a personality trait, it is a byproduct of never letting the drawdown get deep enough to scare you.