What it means
Imagine a portfolio that climbs to $1,000,000, then drops to $700,000 before it begins to recover. The peak is $1,000,000, the valley is $700,000, and the drawdown is the percentage lost between them.
It captures the real experience of someone who held through the whole decline, which is why it is often called the most intuitive measure of investment risk. The measure matters because average returns hide the route taken.
Two funds can both return 8% a year on average, yet one may fall 10% at its worst while the other falls 40%. Most people feel losses more strongly than gains, so the deeper decline is harder to live with and often leads to panic selling.
The largest drawdown over a whole history is called the maximum drawdown. Fund managers quote it alongside returns and volatility, and risk reports use it as a stress indicator.
Many investors set limits, such as reducing exposure if a portfolio falls 15% from its high, and some fund mandates make that limit a formal rule. Duration is a second dimension.
A drawdown has a length from peak to valley and then a recovery period back to the old peak, and the whole cycle can take months or years. Time under water is often as important as depth, because investors with short horizons or regular withdrawals may not be able to wait.
There is also an important piece of arithmetic. Recovering from a loss needs a bigger percentage gain than the loss itself: a 50% fall requires a 100% gain to get back to the start.
This asymmetry is one reason risk managers care so much about limiting large drawdowns. A nuance is that drawdown depends on the measuring window and the data frequency.
Daily data will show deeper troughs than monthly data, and a short track record may not include a serious downturn. Treat any quoted figure as the worst seen so far, not the worst that can happen.
In practice
Real-world examples.
Example
A pension fund manager reports that her equity portfolio's maximum drawdown over ten years was 28%. The trustees compare this to their tolerance of 25% and decide to move part of the portfolio into bonds.
Example
A start-up founder tracks his company's cash balance, which peaked at $2,400,000 and fell to $900,000 before a funding round. The drawdown of 62.5% shows how close the business came to running out of money.
Example
A retail investor looks at two funds. Both have returned 7% a year, but fund A had a worst fall of 12% while fund B had a worst fall of 35%, so she chooses fund A because she expects to need the money in five years.
Formula
Calculation
Drawdown = (Peak value - Valley value) / Peak value x 100
Recovery gain needed = (Peak value - Valley value) / Valley value x 100
Suppose a portfolio rises to a peak of $1,000,000 and then falls to a valley of $700,000. Drawdown = (1,000,000 - 700,000) / 1,000,000 x 100 = 30%. To get back to $1,000,000, the portfolio must gain (1,000,000 - 700,000) / 700,000 x 100 = about 42.9%. If it takes 9 months to fall and 15 months to recover, the full cycle lasts 24 months. A second, smaller fall of 10% from a later peak of $1,100,000 would be a drawdown of $110,000, leaving $990,000, but the maximum drawdown would still be the 30% figure because it is the larger of the two.Case study
Seen in the real world.
Summit Ridge Capital is an illustrative, fictional investment firm that manages $50,000,000 for a family office. Over three years its portfolio rose from $50,000,000 to $65,000,000 and then dropped to $48,750,000 during a market sell-off.
The family's chief financial officer calculated the drawdown at 25% ((65,000,000 - 48,750,000) / 65,000,000), well above the 15% limit written in their investment policy. The manager had to explain why risk controls had not triggered earlier.
The firm agreed to add an automatic review whenever the drawdown reached 10%, to report the figure to the family each month, and to hold more in lower-risk assets. The illustrative lesson is that a drawdown limit only protects capital if someone is monitoring and ready to act.
Watch out
Common mistakes.
- Comparing funds by average return alone, which ignores how deep and long the losses were along the way.
- Forgetting that a 50% loss needs a 100% gain to recover, and underestimating how hard recovery can be.
- Treating the historical maximum drawdown as the worst possible outcome, when a bigger fall may still occur.
Questions
People also ask.
What is the difference between drawdown and volatility?
Volatility measures how much returns bounce around on average, whereas drawdown measures the actual peak-to-trough loss.
What is a good maximum drawdown?
It depends on the strategy and investor, but many conservative investors prefer figures below 15% to 20%.
Is drawdown measured on closing prices?
Often yes, but some analysts use daily or intraday values, which can make the figure larger.
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