The recovery math of drawdown: why a 30% loss is worse than you thought

Our minds see gains and losses as symmetric; mathematics does not. Returning from any loss requires more growth than the loss itself — and the gap widens fast with depth.

Why this matters

• A manager calling a drawdown “temporary” does not quote the recovery share; you must compute it.
• A loss-limit rule without the recovery table is a number without feeling.

What to do in practice

See the growth needed for your own loss level with the recovery calculator, and set your loss limit backward from it. When you review a managed account, ask for its drawdown history — not just its returns. Full guide: risk management.

Frequently asked questions

My manager says “a 20% drawdown is normal” — is it? Normal depends on strategy and asset; what matters is knowing how much growth a 20% hole needs and whether your manager has a record of delivering it.

Where do I see the largest drawdown? In the account’s track record; if it is not shown, ask. Its absence is itself an answer.

Does this math apply to portfolios too? Yes; to any capital that draws down and recovers — including baskets of accounts.

My manager says the drawdown is only temporary; how do I test that? Ask for three things: the full history of past drawdowns and what followed each, the growth needed to recover this one (with the calculator), and the manager’s volume behaviour this period (from SANJESH). “Temporary” is a claim; these three are data.

Summary

Compute the recovery table once and you will remember it forever: the recovery calculator.

Three mathematical truths of drawdown

• Recovering each percent of loss needs a larger percent of gain
• The asymmetry sharpens with depth
• Deep losses force bigger risks afterwards
• Set loss limits backward from the worst case
• Ask a manager for drawdown history, not just returns

The recovery calculator: See it.