Maximum Drawdown Calculator
Find the worst peak-to-trough decline in your portfolio history.
Example data pre-loaded. Replace with your values.
Leave blank to use period numbers (1, 2, 3…)
Maximum Drawdown
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peak-to-trough decline
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Peak Value
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Trough Value
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Absolute Loss
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Recovery Needed
Equity Curve
Peak and trough marked. Red shading shows the maximum drawdown period.
Drawdown %
Percentage decline from the running peak at each period.
Drawdown Statistics
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How to use this calculator
The inputs are deliberately simple. Paste your data, set your labels, and hit calculate.
Portfolio Values is the main input. Enter one value per line, or comma-separate them. These are the actual portfolio values at each point in time: 10000, 10850, 11200, 10900, and so on. Don’t enter returns or percentage changes. Enter the raw values, the way your brokerage statement would show your account balance each month.
Period Labels is optional but worth filling in. Type “Jan 2023”, “Feb 2023”, etc., one per line, matching the order of your values. If you leave it blank, the calculator labels each period P1, P2, P3. Labelled periods make the output chart readable at a glance.
Data Interval tells the calculator what each row represents: monthly, weekly, daily, or quarterly. This affects how recovery periods are described in the output (“2 months” reads better than “2 periods”).
Click Analyse Drawdown and you get a full results panel plus 2 charts.
Reading the outputs:
The blue results panel at the top shows 4 numbers: peak value (the highest point before the worst decline), trough value (the lowest point after that peak), absolute loss (the raw dollar/unit drop), and recovery needed (the percentage gain required to get back to the peak).
The Equity Curve chart plots your actual portfolio values over time. The green dot marks the peak. The red dot marks the trough. The dashed line shows where the peak was, so you can see exactly how far below it the portfolio fell and how long it took to recover.
The Drawdown % chart below it shows the percentage decline from the running peak at each period. When the line is at 0%, the portfolio is at or above its previous high. When it dips, you’re in a drawdown. The deepest point on this chart is the maximum drawdown.
The Drawdown Statistics table below the charts breaks down everything: periods analysed, MDD percentage, peak and trough locations, absolute loss, recovery needed, recovery period, average drawdown, start value, end value, and overall return.
Example: 12-month portfolio series
Values entered: 10000, 10850, 11200, 10900, 12400, 11800, 10300, 9800, 11500, 12800, 13200, 12600
Period labels: Jan 2023 through Dec 2023, Data interval: Monthly
Peak identified: 12,400 at P5 (May 2023) Trough identified: 9,800 at P8 (Aug 2023)
MDD = (9,800 - 12,400) / 12,400 = -20.97% Absolute loss = -2,600 Recovery needed = 12,400 / 9,800 - 1 = +26.53% Recovery period: 2 months (trough at P8, back above peak by P10)
The calculator finds the global maximum drawdown: the single worst peak-to-trough decline across the entire series. If your data has multiple significant drawdowns, they all appear in the Drawdown % chart, but the headline MDD figure is the deepest one.
Reading the equity curve and drawdown chart
After you click Analyse Drawdown, the calculator produces two charts. They tell the same story from two different angles — one in dollar value, one in percentage pain. Here is exactly what every element means and what to look for.
Chart 1 — Equity Curve
The equity curve is the blue line: your actual portfolio value at every period from left to right.
Every visual element has a specific meaning:
- Blue line — Your actual portfolio value over time. Rising = growth. Falling = loss. Steeper slope = faster decline.
- Green dot — The peak: highest value reached before the worst drop started. Hover over it to see exact value and period label.
- Red dot — The trough: the lowest point reached after the peak. This is the bottom of the maximum drawdown. Hover to confirm the exact value.
- Dashed grey line — The running peak level: stays at whatever the highest value was so far. The portfolio must climb back above this line to be considered recovered.
- Red shaded zone — The drawdown period: every period where the portfolio sat below its previous high. Wider zone = longer drawdown lasted.
- Dashed red vertical line — Connects peak to trough and shows the MDD percentage drop directly on the chart.
How to use the hover tooltip: Move your cursor (or tap on mobile) anywhere on the equity curve. The tooltip shows both the portfolio value and the running peak value at that period — so you can see at a glance how far underwater the portfolio was at any moment.
What patterns to look for:
Sharp V-shape — Fast crash, fast recovery. Common in market-wide shocks (COVID 2020). The MDD can be large but the red zone is narrow. Recovery was quick.
Wide flat bottom — Portfolio hit a low and stayed there for many periods. Even if the MDD percentage matches a V-shape, this is worse to live through. Check the recovery period in the statistics table.
Multiple dips — The blue line dips several times without making a new high. The drawdown chart (below) will show a prolonged underwater stretch. Look for how long the line stays below the dashed grey line.
New all-time highs — When the blue line crosses above the dashed grey line, the running peak steps up to the new high and the drawdown chart shows 0%. This is full recovery.
Tip: The green and red dots mark the global maximum drawdown — the single worst decline. Other smaller dips appear in the blue line but don’t mark the red dot. The drawdown % chart below shows all drawdowns at once, including the minor ones.
Chart 2 — Drawdown % Over Time
The drawdown % chart (the red filled-area chart below the equity curve) answers one question at every single period: how far below its previous high is the portfolio right now?
Reading the chart element by element:
- 0% top edge — When the red line sits here the portfolio is at or above its last all-time high. No drawdown. This is the “recovered” state.
- Any dip below 0% — The portfolio is underwater. It has fallen from a previous peak and has not yet recovered. The Y-axis value tells you exactly how deep.
- Red dot — The maximum drawdown: the single worst period in the entire series. Hover to see the exact MDD percentage.
- Red filled area — Every shaded period is time spent in a drawdown. Wider shaded area = longer the suffering lasted.
- Green dashed vertical — The moment the portfolio fully recovered, i.e. the first period the line returns to 0% after the MDD. The distance from the red dot to here is the recovery period.
How to use the hover tooltip: Hover anywhere on the drawdown chart. The tooltip shows the exact drawdown percentage at that period — for example “Drawdown: −8.06%” means the portfolio was 8.06% below its previous high at that moment.
What the shape tells you:
Mostly at 0% — Portfolio spent almost all its time at or near new highs. Brief, shallow dips. Low-drawdown, efficient strategy.
Long stretches below 0% — Portfolio was underwater for many periods. Even a small MDD is hard to live with if recovery takes a long time. Check average drawdown in the statistics table — if it’s close to MDD, the portfolio was almost always in a drawdown.
Multiple separate dips — Several dip-and-recover cycles. Each time the line returns to 0% it’s a separate recovered drawdown. The worst one is the MDD. Recurring dips suggest chronic risk, not just one bad event.
Steep drop, slow recovery — Line falls sharply but rises gradually. Momentum strategies often look like this. Compare the slope going down vs. the slope coming back.
Reading both charts together — a 5-step walkthrough:
- Find the green dot on the equity curve — that is the moment the best times ended.
- Find the red dot on the equity curve — that is the worst moment.
- Look at the drawdown chart between those two periods — that is the entire time investors were losing money and waiting.
- Find where the drawdown chart returns to 0% — that is when investors finally broke even.
- Count the periods from the red dot to the 0% crossing — that is the recovery period shown in the statistics table.
The equity curve shows what happened to your money. The drawdown chart shows what it felt like to hold the investment through it. Both charts answer different questions — always read them as a pair.
What problem this calculator solves
Anyone can calculate a return. Returns look flattering in rising markets and hide the experience of living through the losses.
Imagine a fund returned 40% over 3 years. Sounds solid. Now you find out it dropped 55% at one point before recovering. That’s a very different investment to hold through. The 55% drop is the maximum drawdown, and it’s the number that determines whether an investor actually stays in the strategy or panic-sells at the bottom.
Calculating MDD by hand from a long price series is painful. You have to track the running peak at every point, compare each value to that peak, find the minimum ratio, and then trace back to find the start and end dates of that drawdown. For a 5-year monthly series, that’s 60 calculations done in sequence. Miss one update to the running peak and the whole answer is wrong.
The calculator does all of it instantly, plots it visually, and tells you the recovery stats too.
What maximum drawdown actually measures
Think of it like a hiking trail with elevation. Your portfolio value is your altitude. MDD is the answer to: “What’s the biggest cliff I fell off, measured from the highest point I’d reached before the fall?”
A 20% MDD means at some point the portfolio was 20% below its previous peak. From 100 to 80. The recovery needed to get back to 100 from 80 isn’t 20%. It’s 25%. That asymmetry is the thing most investors don’t feel until they’re living through it.
MDD captures both the severity of the drop and implicitly its duration, because a slow grind down is worse to live through than a sharp crash that recovers fast. Combine MDD with recovery period (how many periods it took to get back to the peak) and you have a complete picture of downside risk.
A portfolio that drops 50% needs to gain 100% just to break even. Maximum drawdown makes that math visible before you commit capital to a strategy.
The formula explained
Three formulas run the full calculation. Start with the core MDD:
The result is always negative or zero. A MDD of -0.2097 is reported as -20.97%.
The peak value is the maximum portfolio value observed before the trough. The calculator tracks the running peak: at each period, the peak is the highest value seen so far in the series.
The MDD is the minimum value of the drawdown series across all periods. That’s the deepest trough relative to whatever peak preceded it.
The recovery needed (shown as a positive percentage) uses:
This is always larger than the drawdown percentage in absolute terms. A 20.97% drop requires a 26.53% gain to recover. A 50% drop requires a 100% gain. The further you fall, the steeper the climb back.
The peak used in the MDD formula is the highest point before the trough, not the highest point in the entire series. If your portfolio makes a new all-time high after recovering, that new high doesn’t retroactively change the MDD calculation for the earlier drawdown period.
Understanding the output: what each statistic means
The drawdown statistics table the calculator produces has 9 rows. Here’s what each one actually tells you.
The two numbers to pay the most attention to are MDD and recovery needed. The MDD tells you the worst you experienced. The recovery needed tells you what it actually took to get whole again. Those two numbers together define the real cost of a drawdown.
Average drawdown is worth checking too. A fund with -5% MDD and -4% average drawdown was nearly always underwater. A fund with -25% MDD and -2% average drawdown had one bad crash and was otherwise fine. Same headline MDD risk rating, completely different experience.
The formula in action: 3 real scenarios
The crypto portfolio crash
A crypto investor tracks their portfolio monthly throughout 2022. Values started at $50,000 in January and went on a brutal ride.
Crypto portfolio: 2022 bear market
Values (monthly, Jan to Dec 2022): 50000, 55000, 49000, 44000, 38000, 29000, 20000, 22000, 19000, 21000, 17000, 16000
Running peak through the series peaks at 55,000 (Feb). Lowest subsequent value: 16,000 (Dec).
MDD = (16,000 - 55,000) / 55,000 = -70.91% Recovery needed = (55,000 / 16,000) - 1 = +243.75%
The portfolio never recovered within this dataset. Recovery period: still underwater.
The managed equity fund
A fund manager wants to report risk stats for a quarterly equity strategy over 3 years (12 quarters).
Equity fund: 12-quarter track record
Values: 100000, 104000, 109000, 112000, 108000, 103000, 98000, 95000, 102000, 110000, 116000, 121000
Running peak: 112,000 at Q4. Trough: 95,000 at Q8.
MDD = (95,000 - 112,000) / 112,000 = -15.18% Absolute loss = -17,000 Recovery needed = (112,000 / 95,000) - 1 = +17.89% Recovery period: 2 quarters (back above 112,000 by Q10) Overall return: +21.00%
This is a reasonable MDD for an equity strategy. The fund recovered quickly and went on to new highs.
Comparing two strategies side by side
An investor is deciding between two strategies with the same 3-year return. Strategy A returned 35%, Strategy B returned 35%. But the drawdown profiles are completely different.
Same return, very different risk
Strategy A: Peak 130, Trough 126 (just before recovery) MDD = (126 - 130) / 130 = -3.08% Recovery needed: +3.17% / Recovery period: 1 month
Strategy B: Peak 148, Trough 89 (a brutal mid-period crash) MDD = (89 - 148) / 148 = -39.86% Recovery needed: +66.29% / Recovery period: 14 months
Same end return. Completely different psychological and financial reality. Strategy A barely dipped. Strategy B required surviving a 40% crash and waiting 14 months to break even. Most investors would have exited Strategy B near the trough.
Maximum drawdown benchmarks by asset class
MDD varies a lot by asset type. Knowing what’s typical helps you calibrate whether a strategy’s drawdown is acceptable or alarming.
| Asset class | Typical MDD range | Notes |
|---|---|---|
| Cash / money market | 0% to -0.5% | Essentially no drawdown |
| Government bonds (short) | -1% to -5% | Low but not zero in rate cycles |
| Diversified bond fund | -5% to -15% | Higher in rising rate environments |
| Global equity (diversified) | -20% to -55% | Depends heavily on the period |
| US large cap (S&P 500) | -20% to -57% | 2008/09 peak-to-trough was -56.8% |
| Small cap equity | -30% to -70% | More volatile, deeper drawdowns |
| Emerging markets | -40% to -65% | Higher currency and political risk |
| Hedge fund (long/short) | -10% to -30% | Wide range by strategy |
| Crypto (Bitcoin) | -50% to -85% | Multiple cycles of 70%+ drawdown |
| Individual stocks | -30% to -100% | Single-stock risk is severe |
These are historical ranges, not guarantees. The S&P 500’s -56.8% drawdown in 2008/09 was considered extreme at the time. Future drawdowns may be deeper or shallower. Use this table for rough calibration, not precise forecasting.
Common mistakes people make
Entering percentage returns instead of portfolio values. The calculator needs actual values: 10000, 10850, 11200. If you enter percentage changes (8.5%, 3.2%, -2.7%), the running peak calculation breaks. Convert to a value series first by compounding from a base (say 10000).
Using the wrong time interval for the recovery period. If your data is monthly but you select “weekly” in the Data Interval field, the calculator will report “2 periods” but describe them as 2 weeks instead of 2 months. Always match the interval to your actual data frequency.
Confusing MDD with volatility. A high-volatility portfolio doesn’t necessarily have a high MDD if the ups and downs are frequent and shallow. A low-volatility portfolio can have a devastating MDD if it had one sustained downward grind. They measure different things. MDD is about the path from peak to trough, not the bumpiness of the ride overall.
Truncating the dataset before recovery. If your data ends while the portfolio is still underwater, the recovery period will show as “not recovered.” That’s accurate for the dataset you provided, but doesn’t mean the strategy never recovered. Check your data endpoints.
Comparing MDD across different time horizons. A 20-year track record has had more chances to produce a large drawdown than a 2-year track record. A fund with -15% MDD over 20 years is likely more impressive than one with -12% MDD over 18 months.
Never compare MDD numbers without knowing the time period they cover. A hedge fund advertising “max drawdown -8%” on a 6-month track record tells you almost nothing. The same fund over a full market cycle including a bear market is a completely different story.
Factors that change how MDD feels in practice
The headline MDD percentage is only part of what determines whether a drawdown is survivable.
Speed of decline matters. A 20% drop over 2 weeks (a crash) produces more panic than a 20% drop over 18 months (a grind). Both have the same MDD. Psychologically they’re very different. A slow decline gives investors more time to make bad decisions at the bottom.
Where in the investor’s lifecycle the drawdown hits. A 30% drawdown on a $50,000 portfolio early in a career is recoverable. The same percentage drawdown on a $2 million portfolio the year before retirement is potentially catastrophic in absolute dollar terms, even if the percentage is identical.
Correlation with other assets. If your portfolio’s worst drawdown happened at the same time as your income, your real estate, and your job security were also under pressure, the MDD understates the real impact. Drawdowns that are correlated with broader economic stress are harder to survive than idiosyncratic ones.
Average drawdown alongside maximum drawdown. The average drawdown shows how often and how deeply you’re underwater across all periods. A strategy that was underwater 60% of the time with an average drawdown of -8% is harder to stick with than one that had a single -20% crash and was otherwise at or near new highs.
The maximum drawdown is the worst single fall. The average drawdown is how it felt to own the strategy day-to-day. Both numbers together tell the real story.
What to do with your result
If you’re evaluating a fund or strategy: compare the MDD to the overall return over the same period. A fund that returned 60% with a -45% MDD is a harder investment to hold than one that returned 40% with a -12% MDD. The Calmar ratio (annual return divided by MDD) formalises this comparison into a single number.
If you’re reviewing your own portfolio: check whether the MDD occurred during a specific event (2020 COVID crash, 2022 rate hikes) or was strategy-specific. Market-wide drawdowns affect everyone; strategy-specific drawdowns suggest a structural problem worth investigating.
If you’re setting risk parameters: use MDD as a hard stop trigger. Many professional managers define a “circuit breaker” where if drawdown exceeds X%, they reduce position size or halt trading. The calculator’s output gives you the historical worst case to calibrate that trigger.
If you’re reporting to investors: MDD is one of the standard risk statistics in any professional fund factsheet, alongside annualised volatility and Sharpe ratio. Showing it proactively builds more trust than waiting to be asked.
Your drawdown analysis is ready to use when you’ve entered at least 6 data points covering a period that includes at least one meaningful decline. A series that only goes up will show 0% MDD, which is technically correct but not informative. Run the calculator on data that spans a full market cycle if you can.
Maximum drawdown vs. other risk metrics
MDD is the most intuitive risk metric, but it doesn’t work alone. Here’s where it sits relative to the other numbers investors use.
| Metric | What it measures | Works with MDD because… |
|---|---|---|
| Maximum drawdown | Worst peak-to-trough decline | The baseline downside severity number |
| Calmar ratio | Annual return / MDD | Tells you whether the return justifies the drawdown |
| Sharpe ratio | Return per unit of volatility | MDD and Sharpe together cover both tail and day-to-day risk |
| Sortino ratio | Return per unit of downside volatility | More sensitive to losses than Sharpe, pairs well with MDD |
| Recovery period | Time to return to previous peak | Converts MDD severity into a time dimension |
| Average drawdown | Mean drawdown across all periods | Shows whether MDD was a one-off or a chronic issue |
The bottom line
Maximum drawdown is the one risk number that investors feel in their gut. Volatility is abstract. Sharpe ratios require explanation. But “at one point you were down 35% and it took 18 months to recover” is something everyone understands immediately.
Run your portfolio values through the calculator. Look at the MDD, the recovery needed, and the average drawdown together. If any of those numbers would have caused you to sell at the worst moment, the strategy is riskier than you can actually hold.
The best strategy is the one you’ll stick with through its worst drawdown. Knowing what that worst drawdown looks like before it happens is the whole point.
Frequently Asked Questions
What is maximum drawdown (MDD)?
Maximum Drawdown is the largest peak-to-trough decline in a portfolio's value over a given period, expressed as a percentage. It answers the question: "What was the worst loss an investor experienced before a new high was reached?"
How is maximum drawdown calculated?
MDD = (Trough Value − Peak Value) ÷ Peak Value × 100. You scan the portfolio value series, find the highest point (peak), then find the lowest subsequent point (trough), and express the decline as a percentage. If the portfolio hit $120,000 then fell to $84,000, MDD = (84,000 − 120,000) ÷ 120,000 = −30%.
What is a good maximum drawdown?
Lower is better. For context: the S&P 500 saw a −57% MDD in the 2008–09 financial crisis and −34% in the 2020 COVID crash. Most professional hedge funds target drawdowns under −20%. Conservative strategies often target under −10%. What is "acceptable" depends heavily on your time horizon and risk tolerance.
Why is recovery harder than it looks?
Because of the asymmetry of losses. A −10% loss requires an 11.1% gain to recover. A −25% loss requires a 33.3% gain. A −50% loss requires a 100% gain. This asymmetry is why limiting drawdowns is critical — a smaller loss recovers far faster than a large one.
What is the Calmar Ratio?
Calmar Ratio = Annualized Return ÷ |Maximum Drawdown|. It measures return earned per unit of drawdown risk. A ratio of 1.0 means the annualized return equals the max drawdown. Above 1.0 is generally considered good; above 3.0 is exceptional. It is commonly used to evaluate hedge funds and trend-following strategies.
How is maximum drawdown different from volatility?
Volatility (standard deviation) measures how much returns fluctuate around their average — it treats upside and downside moves equally. Maximum drawdown only captures the downside: the actual worst-case loss experienced. Many investors prefer MDD because it reflects the real pain of holding an investment through a decline.
What is a rolling drawdown?
A rolling drawdown calculates the drawdown over a moving window (e.g., the worst 12-month loss at every point in time). It shows how drawdown risk varied throughout the investment period rather than just the single worst all-time event. Rolling drawdowns are useful for identifying periods of sustained underperformance.
What was the S&P 500's historical maximum drawdown?
The worst modern drawdown was approximately −57% from October 2007 to March 2009 during the Global Financial Crisis. Other major events: −49% during the dot-com bust (2000–02), −34% in the 2020 COVID crash (recovered within months), and −48% during the 1973–74 oil crisis.
How can I reduce maximum drawdown in my portfolio?
Key strategies: (1) diversify across uncorrelated assets — bonds, commodities, and international equities often decline less than domestic equities; (2) use stop-loss rules or dynamic hedging; (3) reduce leverage; (4) tilt toward lower-beta or defensive sectors; (5) hold a cash or short-term bond buffer that can be deployed during drawdowns.
How does maximum drawdown relate to risk management?
MDD is a core risk metric for portfolio managers, risk officers, and fund allocators. It sets position sizing limits, defines stop-loss thresholds, and benchmarks strategy risk. Many institutional investors won't allocate to a strategy with an MDD exceeding a certain threshold (e.g., −25%) regardless of returns, because the risk of investor redemptions during drawdowns is too high.
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