Glossary
Drawdown
A drawdown is the percentage fall from an investment's peak to its trough, and it is the number that decides whether an investor holds or sells. Recovery is asymmetric: a 50% drawdown needs a 100% gain to break even.
What it is
A drawdown is the decline from a portfolio's highest value to its lowest point before recovery, quoted as a percentage of the peak. The S&P 500's maximum drawdowns are the reference points: minus 57% from October 2007 to March 2009, minus 34% in the five weeks of March 2020, and minus 25% through the 2022 rate shock. Maximum drawdown is the worst entry on that list, and it is the number portfolios should be sized against.
The arithmetic is brutally asymmetric: a 10% fall needs an 11.1% gain to recover, a 30% fall needs 42.9%, and a 50% fall needs 100%. The 2007 drawdown kept the index underwater for about five and a half years, peak to new high. Drawdown is not volatility — it is the realized version, and it is the number that triggers the selling that turns it permanent.
Key takeaways
- A drawdown is the peak-to-trough fall in percentage terms; maximum drawdown is the worst on record.
- Recovery is asymmetric: minus 30% needs plus 43%, and minus 50% needs plus 100%.
- The S&P 500's worst drawdowns ran minus 57% in 2007-09 and minus 34% in March 2020.
- A drawdown only becomes a loss when it forces a sale or the asset never recovers.
- Retirement portfolios face sequence risk: an early drawdown is spent from, not earned back.
How it works
The measurement runs continuously: track the highest value the portfolio has reached, compare every later value against it, and the deepest gap is the current drawdown. A $500,000 portfolio that falls to $350,000 carries a 30% drawdown and needs $150,000 of gains, 42.9% of the trough value, to restore the peak. The recovery ladder steepens as the fall deepens, which is the asymmetry investors learn once and never forget.
The ladder reads: minus 10% needs plus 11.1%, minus 20% needs plus 25%, minus 30% needs plus 42.9%, minus 50% needs plus 100%, and minus 57%, the 2007-09 trough, needed plus 133%. The S&P 500 completed that one by March 2013, roughly four years after the bottom and five and a half after the peak. Underwater time, not the depth alone, is what breaks retirement plans.
The retirement version adds withdrawals. A $1 million portfolio paying $40,000 a year that draws down 30% early in retirement is spending from a shrinking base, and the withdrawals convert a temporary fall into a permanent one unless another asset funds the gap. That is sequence risk, and it is why retirement portfolios hold bonds and cash to sell instead of equity to nurse.
Why it matters
Drawdown is the number the allocation is really sized against. Choosing 80% equities is choosing to experience the S&P 500's next minus 50% at nearly full strength, and the choice should be made in calm weather for the weather that is coming. The questionnaire version of risk tolerance and the drawdown version usually disagree, and the drawdown version is the one with consequences.
I watched a colleague named Brent (yes, that Brent) size his portfolio for the average year, plus 10%, and meet 2022's minus 25% at full allocation. He sold in the low twenties, describing it as protecting capital, and the recovery priced him out. His maximum drawdown turned permanent the day he made it one.
The highest-leverage thing most Americans can do is size the equity allocation to a drawdown they can hold through, automate contributions through the fall, and keep retirement withdrawals funded from the sleeves that are not falling. Stress the allocation with the drawdown risk calculator and the tail with the value at risk calculator. The trough is survivable; the sale at the trough rarely is.
Real-world examples
The recovery ladder arithmetic
A $100,000 portfolio falls 30% to $70,000. The gain needed to restore $100,000 is 42.9%, because 70,000 times 1.429 returns the peak. At a 50% drawdown the same portfolio sits at $50,000 and needs a doubled balance, plus 100%, to break even. The deeper the fall, the steeper the climb back, which is why a 10% dip and a 50% collapse are different categories of event deserving different allocations. The ladder is the first thing to check before admiring anyone's allocation.
The 2007-09 underwater arithmetic
The S&P 500 peaked in October 2007 and bottomed in March 2009 at minus 57%. A $500,000 portfolio marked to the index held roughly $215,000 at the trough and needed a 133% gain to restore the peak. The index delivered it by March 2013, four years later, provided nobody sold the trough. The underwater stretch ran five and a half years, which is the number retirement plans must be sized to survive. The depth was the headline; the underwater time was the damage.
The retirement sequence arithmetic
A retiree with $1 million withdrawing $40,000 a year suffers a 30% drawdown in year two: the portfolio is $672,000 after the withdrawal, and $40,000 now removes 6% of what remains. Withdrawals from the bond and cash sleeves leave the equity to recover; the same $40,000 taken from equities converts the drawdown into a permanently smaller portfolio. Sequence, not the average return, decides which retirement funds which decade. The withdrawal plan is the defense; the allocation is the armor.
Common mistakes
Mistake: Sizing the portfolio for the average year.
Why it bites you: Equity averages run near 10% a year while drawdowns run past 50% a few times a century, and both are the same asset. Size for the trough, enjoy the average.
Mistake: Selling at the trough.
Why it bites you: The sale converts a temporary drawdown into a permanent loss and hands the recovery to whoever bought. Brent's March 2020 exit is the standing case study.
Mistake: Confusing a paper drawdown with a realized loss.
Why it bites you: An unrealized fall recovers; a realized one is taxed, spent, or gone. The distinction is only visible at the moment it stops mattering.
Mistake: Withdrawing from the falling sleeve in retirement.
Why it bites you: Early-retirement withdrawals from a 30%-drawn equity base lock in losses at the trough. Fund withdrawals from bonds and cash while the equity recovers.
Ivy's take
I spent a weekend tabulating every S&P 500 drawdown since 1950 so you do not have to, and the pattern is a metronome: a decline every year or two, a bear a few times a decade, and one monster per generation. None of them were survivable by everyone. All of them were survivable by anyone who had sized the portfolio in advance and left the selling to someone else.
I ran my own allocation through the same table before buying, which is the entire maintenance routine. Drawdown is the tuition the equity premium charges, and it is payable in advance through sizing or in arrears through regret. I prefer the advance rate. Brent financed his.
Related jargon, defined
- Maximum drawdown
- The worst peak-to-trough decline on an investment's record.
- Recovery gain
- The percentage gain needed from the trough to restore the peak.
- Sequence risk
- The danger that early-retirement drawdowns permanently deplete a portfolio.
- Underwater time
- The span from peak to full recovery.
- Volatility
- The width of ongoing swings, of which drawdowns are the realized form.
- Risk tolerance
- The drawdown you can hold through without selling.
Frequently asked questions
What is the difference between drawdown and volatility?+
Volatility measures the size of ongoing price swings; drawdown measures the realized fall from a peak to a trough. Volatility is the weather report, and the drawdown is the storm that actually arrived.
What is the worst drawdown in S&P 500 history?+
Minus 89% during the Great Depression, with minus 57% the postwar record from 2007 to 2009. Sizing against the postwar number is the modern standard.
How long does it take to recover from a drawdown?+
It depends on the depth: a 20% fall historically took months to a couple of years, while the 2007-09 trough took four years to recover and five and a half years to a new high. Deeper falls need disproportionately longer.
How much drawdown can a retirement portfolio handle?+
Far less than an accumulating portfolio, because withdrawals from a falling balance lock in losses. Funding withdrawals from bonds and cash during the fall is the standard defense.
How do I check a fund's maximum drawdown?+
Most fund fact sheets and portfolio tools publish maximum drawdown over the fund's history. Compare it to the benchmark's, because a fund falling 40% in an index's 30% fall has a story worth reading.
Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.
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Ivy Sinclair-Wren
Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the US tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.