Direct Answer
A drawdown chart is a chart visualizing the percentage decline from an asset's or portfolio's running peak value over time. At any point, the plotted value is zero or negative, since it's always measured against the highest value reached so far, not against where the price started, and not against yesterday's close.
Key Takeaways
- A drawdown chart plots percentage decline from an asset's or portfolio's running peak, the line sits at zero or below, never above.
- The line only returns to zero once the underlying value sets a brand-new peak, not simply when it stops falling.
- Reading the chart means looking at two dimensions together, how deep an underwater period goes, and how wide (long) it stretches.
- This page covers how to read the chart's shape; the calculation itself lives on Swoopr's dedicated Rolling Drawdown indicator page.
- Depth and width together are a commonly cited way to gauge historical risk, not a guarantee of how future declines will behave.
What Is a Drawdown Chart?
A drawdown chart is a chart visualizing the percentage decline from an asset's or portfolio's running peak value over time. At any point, the plotted value is zero or negative, since it's always measured against the highest value reached so far, not against where the price started, and not against yesterday's close. This chart type is sometimes called an "underwater" chart, since the line sits below the zero line for as long as the asset or portfolio remains below its prior high.
It visualizes the same underlying rolling-drawdown concept and formula covered on Swoopr's dedicated Rolling Drawdown indicator page. This page focuses specifically on how to read a drawdown chart's shape, the width and depth of underwater periods, rather than re-deriving that calculation.
How a Drawdown Chart Is Built
At each point in time, the chart tracks the running peak, the highest value the asset or portfolio has reached up to and including that point, and plots how far the current value sits below that peak, as a percentage. When the asset or portfolio is sitting at a new all-time high, the running peak and the current value are the same number, so the drawdown reads exactly zero. As soon as the value drops below that peak, the line goes negative, and it stays negative until the value climbs back up far enough to set a new peak of its own.
That last detail is what makes a drawdown chart read differently from a plain price chart: a bounce that recovers most, but not all, of a decline still shows as an ongoing (if shallower) drawdown, the line only returns to zero on a new high, not on any partial recovery.
How to Read the Shape
Hypothetical example, for education only.
Picture two portfolios, each with a drawdown chart covering the same one-year window:
| Portfolio | Maximum depth | Width of underwater period |
|---|---|---|
| Portfolio A | −28% | 3 weeks, then a new high |
| Portfolio B | −15% | 11 months, still underwater at year-end |
On a price chart alone, Portfolio A's decline looks worse, nearly double the drop. But on the drawdown chart, Portfolio A's line spends only a few weeks below zero before snapping back to a new peak, a narrow and deep dip. Portfolio B's line is shallower but stretches across most of the year without ever climbing back to zero, a shallow and wide underwater period. Which one represents the more uncomfortable holding experience depends on what a trader or investor cares about: Portfolio A tested a sharper single-period loss, while Portfolio B tested patience over a much longer stretch of never being back at even.
Reading a drawdown chart well means looking at both dimensions together, not just the single lowest point the line reaches. The deepest point (maximum drawdown) is the number most often quoted, but it says nothing on its own about how long the recovery took, two charts can share the same maximum depth and look completely different in shape.
How Traders Use a Drawdown Chart
Comparing strategies or holdings on the same axis
Because every drawdown chart is scaled the same way, a percentage measured against a running peak, it puts assets or strategies with very different price levels on comparable footing. A $40 stock and a $4,000 stock can be laid side by side on their drawdown charts even though their raw price charts aren't directly comparable.
Judging recovery time, not just severity
The width of an underwater period is commonly used as a rough gauge of how long a strategy or holding has historically taken to recover from a given size of decline. A chart with frequent, narrow dips reads differently than one with the same average depth but long, wide troughs, even if both eventually recovered.
Spotting the current underwater period at a glance
Whether the line is presently at zero (a new high) or sitting some distance below it tells a viewer immediately whether the asset or portfolio is currently underwater, and roughly how deep, a piece of context a raw price chart doesn't surface as directly.
None of this amounts to a prediction. A drawdown chart is a description of what already happened; how deep or wide a future decline turns out to be is not something the chart's shape by itself can forecast, and drawdown-based risk assessment more broadly remains a commonly cited but contested way to compare strategies, since it depends heavily on the specific historical window shown.
Limitations and Common Mistakes
- Reading only the deepest point. Maximum drawdown is one number; it says nothing about how wide the underwater period was, or how many separate drawdowns occurred over the same window.
- Assuming the line returning near zero means fully recovered. The line only reaches exactly zero at a new peak, a near-zero reading still means the asset or portfolio hasn't yet reclaimed its prior high.
- Comparing drawdown charts across different time windows without noting it. A five-year drawdown chart and a one-year drawdown chart for the same holding can look very different simply because of what period each one covers.
- Treating a shallow, wide drawdown as automatically "safer" than a deep, narrow one. Depth and width measure different kinds of discomfort, which matters more is a judgment call, not a fact the chart states on its own.
- Extrapolating past shape to future risk. A drawdown chart is entirely backward-looking; it describes historical decline patterns, not a guarantee of how large or long a future drawdown will be.
Depth and Width Measure Two Different Kinds of Pain
A drawdown chart shows two things at once, and most summaries report only one. Depth is how far below the running peak the line travelled, which is the number that gets quoted as maximum drawdown. Width is how long the line stayed below zero, and it is invisible in that single figure. A shallow decline lasting three years and a sharp one recovered in six weeks can look similar in a headline statistic and describe completely different experiences of holding the position.
Which of the two matters more is a judgment about your own situation rather than a fact the chart supplies. A long underwater stretch ties up capital and tests patience; a deep, fast one tests conviction. The chart shows both honestly and ranks neither.
One reading detail catches people out. The line only touches zero when a brand-new peak is set, so a reading near but not at zero means the prior high has still not been reclaimed. Close to the surface is not the same as recovered, and treating a recovery as complete before the line reaches zero misstates where the position actually stands.
Also note the window whenever you compare. A five-year drawdown chart and a one-year chart for the same holding can look entirely different simply because of which declines each period contains, and the deepest point in any chart is the deepest point so far rather than a ceiling on what is possible.
Drawdown Chart FAQs
What is a drawdown chart?
A drawdown chart plots the percentage decline from an asset's or portfolio's running peak value over time. At any point the plotted value is zero or negative, since it is always measured against the highest value reached so far.
Why is a drawdown chart always at or below zero?
Because each value on the chart is measured against the running peak, the highest value reached up to that point, not the current value or a fixed starting point. Whenever the asset or portfolio sits at a new all-time high, the drawdown reads exactly zero; any level below that prior peak reads as a negative percentage.
What does the width of an underwater period on a drawdown chart show?
The width is the time axis, how long the line stays below zero before it climbs back to zero, which happens only once the underlying value sets a new peak. A wide underwater period means a long recovery; two drawdowns of similar depth can still tell very different stories if one is narrow and one is wide.
How is a drawdown chart different from the rolling drawdown indicator?
They visualize the same underlying rolling-drawdown concept and formula. Swoopr's Rolling Drawdown indicator page covers how that percentage is calculated with a worked numeric example; this page focuses on reading the resulting chart's shape, the width and depth of underwater periods, rather than re-deriving the formula.
Does a deep drawdown always mean a bad investment?
Not by itself, and depth alone is a contested way to judge an investment, a deep but short drawdown that recovers quickly can leave less total damage than a shallower one that drags on for years. Traders commonly look at depth and width together, alongside factors the chart does not show, like why the decline happened.
Can a drawdown chart be used for an individual asset and a whole portfolio?
Yes. The same running-peak, percentage-decline construction applies whether the underlying series is a single stock's price, a crypto asset, or a portfolio's total value, only the series being measured changes, not the chart's construction.
Does the start date of the series change a drawdown chart?
Yes, because the first peak is whatever value the series happens to begin at. A chart that starts near a market low shows no drawdown for the opening stretch regardless of what preceded it, since there is no earlier high on record to measure against. Comparing two drawdown charts with different start dates compares two different sets of reference peaks, not two risk profiles.
How does data frequency change the maximum drawdown figure?
Lower frequency understates it. A monthly series only records month-end values, so a decline that reached its worst point mid-month and recovered before the month closed never appears. The same history measured daily finds a deeper trough, and intraday deeper still. A maximum drawdown quoted without its observation frequency is not comparable to one computed on different data.
Should a drawdown chart use price return or total return?
Total return includes distributions, so for an income-paying asset it produces shallower drawdowns and faster recoveries than a price-only series covering the same period. Neither is wrong, but they answer different questions: price return describes the quoted value, total return describes what a reinvesting holder experienced. Mixing the two across assets in one comparison introduces a systematic difference unrelated to risk.