Maximum drawdown measures how far an investment, portfolio, trading strategy, or asset has fallen from its previous peak value before reaching a new peak. It is commonly used to understand the potential downside and risk an investment has experienced over a specific period.
The Maximum Drawdown Calculator helps you identify the largest loss from a previous peak by using historical investment or portfolio values. Simply enter your historical values, and the calculator can determine the biggest decline between a peak and the lowest value that followed it.
Understanding maximum drawdown can help investors and traders compare risk, evaluate portfolio performance, and better understand how much value an investment may have lost during a difficult period.
Disclaimer: Past drawdowns are based on historical performance and do not guarantee how an investment will perform or decline in the future.
What Is Maximum Drawdown?
Maximum drawdown measures the largest decline in an investment from its highest value (peak) to a later lowest value (trough) during a specific period. In simple terms, it shows how much an investment could have fallen from its best point before recovering or reaching another level.
- Peak value: The highest value an investment reaches before a decline.
- Trough value: The lowest value reached after that peak and before a new peak is established.
- Maximum drawdown: The largest percentage decline from a previous peak to a subsequent trough.
Example
Suppose your portfolio reaches a peak value of $50,000 and later falls to a trough of $40,000.
The decline is:
$50,000 − $40,000 = $10,000
The maximum drawdown is:
($10,000 ÷ $50,000) × 100 = 20%
So, the portfolio has a maximum drawdown of 20%.
It is important to note that maximum drawdown should not simply be described as an investment "loss." Technically, it measures the decline from a previous peak to the subsequent lowest point, which makes it useful for understanding the downside risk and volatility an investor may experience.
Maximum Drawdown Formula
Maximum drawdown measures the largest decline in an investment’s value from a previous peak to a subsequent low. It is commonly used to understand the potential downside or risk an investment has experienced.
Formula
Where:
- Peak Value = The highest value reached before the decline
- Trough Value = The lowest value reached after that peak
- Maximum Drawdown (%) = The percentage decline from the peak to the trough
Example
Suppose an investment reaches a peak value of $100,000 and later falls to $75,000.
Maximum Drawdown = [(100,000 − 75,000) ÷ 100,000] × 100
= (25,000 ÷ 100,000) × 100
= 25%
This means the investment declined 25% from its previous peak before reaching the trough.
Dollar Drawdown vs. Percentage Drawdown
Dollar drawdown shows the actual amount of money lost between the peak and trough.
In this example:
$100,000 − $75,000 = $25,000
So, the dollar drawdown is $25,000.
Percentage drawdown expresses the same decline as a percentage of the peak value:
$25,000 ÷ $100,000 × 100 = 25%
When calculating maximum drawdown over a period, you need to identify the highest peak and the lowest subsequent value that occurs after that peak. The largest peak-to-trough decline during the period represents the maximum drawdown.
How to Use the Maximum Drawdown Calculator
Using the Maximum Drawdown Calculator is simple. Just enter the required investment values and let the tool calculate the maximum decline.
- Enter the Portfolio/Investment Name (optional) if you want to identify the investment in your results.
- Enter the Initial Investment Value — this is the starting value of your investment and is used only for calculating Total Return.
- Enter the Peak Value — enter the highest value your investment or portfolio reached before the drawdown.
- Enter the Lowest Value After Peak — enter the lowest value reached after the peak.
- If available, select Show Calculation Breakdown to see how the result was calculated.
- Click the Calculate button to get your results.
The calculator uses the peak value and the lowest value after that peak to determine the maximum drawdown, showing the largest percentage decline from the peak.
Why Is Maximum Drawdown Important?
Maximum drawdown is an important measure for understanding the downside risk of an investment or portfolio. While returns show how much an investment has grown, maximum drawdown shows how much it has fallen from its previous peak during a specific period.
It can help investors understand investment risk and put portfolio volatility into better context. For example, two investments may generate similar returns, but one may have experienced a much larger decline along the way. Looking at drawdown can help you identify which investment had the greater historical risk.
Maximum drawdown is also useful for:
- Comparing investments: It allows investors to compare the historical downside risk of different investments or strategies.
- Assessing risk tolerance: Understanding past declines can help you decide whether an investment's potential losses are suitable for your comfort level.
- Evaluating trading strategies: Traders can use historical drawdowns to see how a strategy performed during difficult market conditions.
- Understanding portfolio risk: It shows how severely a portfolio has declined from its highest value before recovering.
- Preparing for market downturns: Historical drawdowns can give investors a better idea of how much an investment could potentially decline during challenging periods.
It's important to remember that high returns do not automatically mean low risk. An investment can generate strong returns while also experiencing a significant historical drawdown. Looking at both returns and downside risk provides a more complete picture of an investment's performance.
Frequently Asked Questions (FAQs)
Maximum drawdown is the largest percentage decline in an investment or portfolio from its highest value (peak) to its lowest value (trough) before reaching a new peak. It shows how much an investment has fallen during its worst historical decline.
Maximum drawdown is calculated by comparing the lowest value after a peak with that previous peak. The formula is:
For example, if an investment falls from $10,000 to $7,500, the maximum drawdown is 25%.
Generally, yes. A lower maximum drawdown indicates that an investment has experienced less severe historical declines. However, the right level depends on the investment, strategy, expected returns, and your tolerance for risk.
Maximum drawdown is normally reported as a positive percentage representing the size of the decline, such as 25%. However, some financial systems may display drawdown as a negative return, such as -25%.
There is no universal maximum drawdown that can be considered “good.” It depends on the asset class, investment strategy, market conditions, and investor risk tolerance. Comparing drawdown with similar investments can provide more useful context.
No. Maximum drawdown is a historical risk measure. It shows the largest decline experienced during the period being analyzed, but it cannot predict how much an investment may fall in the future.