What This Means
Maximum drawdown is the largest percentage decline from your highest portfolio value to the lowest portfolio value within a given time period.
Formula:
Maximum drawdown = (trough value − peak value) / peak value
In practice, maximum drawdown is often displayed in two ways:
- As a negative percentage: −25% (shows a loss)
- As an absolute decline: 25% drawdown (just the magnitude)
Both represent the same thing—the maximum peak-to-trough decline your portfolio has experienced. The choice is stylistic, though negative percentages can feel more visceral.
A Simple Example
Imagine you started the year with $100,000 in your portfolio:
- By March, market strength pushed it to $120,000 (peak)
- A sudden market correction in June dropped it to $85,000 (trough)
- By year-end, you recovered to $130,000
Your maximum drawdown is: ($85,000 − $120,000) / $120,000 = −29.2%
Notice: your final return is +30% for the year, but your maximum drawdown of −29% tells the real story of what you experienced during the worst moment. That's the risk you actually took on.
Why It Matters
Return is not risk
Two traders can have identical annual returns—say, +25%—but completely different drawdowns. One might have grown steadily while the other experienced wild swings. The same return can come from very different paths, and drawdown reveals which path you took.
It's the worst-case scenario you've already survived
Your annual return might be positive, but at some point during the year you faced a decline. Maximum drawdown is not theoretical; it's the actual worst moment you've already lived through. It answers the question: What's the most I've lost at once?
Risk and return together tell the whole story
A portfolio that returned +40% with a −50% drawdown is riskier than one that returned +15% with a −5% drawdown. Comparing them requires looking at both metrics. Traders and portfolio followers want to know not just what you gained, but how much risk you took to get it.
It helps identify sustainability
A trading strategy with steady returns and controlled drawdown is more likely to be sustainable than one with erratic swings. High drawdowns suggest vulnerability to market shocks or concentration in positions that move together.
Public accountability
If you share your trading results publicly—whether with a fund, followers, or other traders—drawdown is a standard metric people will expect to see. It's part of the full performance picture.
Common Mistakes
Focusing only on return
"I returned +50% this year" sounds impressive until someone asks about drawdown. A +50% return with a −60% drawdown means you lost more than half your portfolio at one point before recovering. That context changes the narrative entirely.
Confusing yearly return with maximum drawdown
Your annual return might be positive, but your maximum drawdown occurred mid-year and may have been severe. The positive return doesn't erase that worst moment. Both metrics are important and independent.
Assuming high drawdown means bad strategy
A high drawdown doesn't automatically mean poor trading. Growth stocks and aggressive strategies naturally experience larger drawdowns. The question is whether the returns justify the drawdown you took, and whether it fits your risk tolerance.
Ignoring drawdown recovery time
Two portfolios can have the same maximum drawdown but recover at different speeds. One might bounce back in months; another might take years. Both are worth considering.
How SharpeShare Helps
SharpeShare connects to your brokerage account using your real connected data to automatically calculate your maximum drawdown alongside your total and annualized returns, benchmark comparison against the S&P 500, and other risk metrics. You see your full performance picture—not just the upside—without maintaining a spreadsheet or manual calculations.
This matters because:
- Real data: Your drawdown is calculated from actual brokerage records, not estimates or assumptions.
- Context: You see drawdown alongside returns and benchmark comparison, making it easy to understand your risk-adjusted performance.
- Sharing: If you choose to share your portfolio publicly, visitors see both your gains and your risk, building trust through transparency.
- Accountability: Tracking drawdown over time helps you evaluate whether your strategy is delivering the risk-adjusted results you want.