The definition
Maximum drawdown measures the largest peak-to-trough decline over a period. It is the number that describes what holding an investment actually felt like.
Recovery arithmetic
A 20% decline requires a 25% gain to return to break-even. A 50% decline requires a 100% gain. A 90% decline requires 900%.
This asymmetry is why avoiding catastrophic losses matters more than capturing every gain.
Expect them
Declines are a normal, recurring feature of investing rather than a malfunction. Broad markets have experienced substantial declines many times, and diversified investors who remained invested experienced recovery over long periods — though no recovery is guaranteed and past behaviour does not guarantee future results.
The formula is gain = decline / (1 - decline). Losses and the gains needed to reverse them are not symmetrical.
Why this matters
An expected decline is survivable. A surprising one gets sold at the bottom.
Terms used in this lesson
- Drawdown
- The decline from a previous peak, measured peak to trough.
- Volatility
- How sharply a value moves over time. High volatility means a wider range of short-term outcomes.
Check your understanding
No score is recorded. This is only here to test whether the lesson landed.
Key takeaways
- Maximum drawdown measures the worst peak-to-trough decline over a period
- The gain required to recover grows faster than the decline itself
- A 50% loss needs a 100% gain to break even
- Declines recur throughout market history; expecting them makes them survivable
Related concepts
- Written by
- Suggested Investments Research Team
- Content type
- Educational article
- Published
- 2026-09-13
- Last reviewed
- 2026-09-13
Sources and methodology
- Investor.gov investor education — U.S. Securities and Exchange CommissionPrimary source
Educational content only. This lesson is not investment, tax or legal advice and does not recommend buying or selling any specific investment. All investing involves the risk of loss.