Maximum Drawdown

Definition

Maximum drawdown (often shortened to "max drawdown" or MDD) is the largest peak-to-trough decline an investment suffers over a given period, measured before it climbs back to a new high. Put plainly: if you had bought at the worst possible moment in the window and sold at the very bottom, the maximum drawdown is how much you would have lost.

It is expressed as a percentage and is always negative (or zero). A fund with a maximum drawdown of −30% fell 30% from its highest point to its lowest point at some stage during the period you are measuring. Unlike an average or a volatility figure, maximum drawdown is a single worst-case number — it captures the deepest hole the fund dug for its shareholders.

Three ideas travel together with the number:

• Peak — the highest value the fund reached before the decline began.
• Trough — the lowest value it fell to before recovering.
• Recovery time — how long it then took to claw back to the old peak. A drawdown

is not truly "over" until the fund makes a new high.

That last point is what makes maximum drawdown so useful to income investors. A metric like standard deviation tells you how much a fund typically bounces around; maximum drawdown tells you how bad the single worst stretch actually got and how long you would have spent underwater waiting to get whole again.

How It's Calculated

The core formula is a simple ratio between the trough and the peak that preceded it:

Max Drawdown = (Trough Value − Peak Value) / Peak Value

  Peak Value   = the highest value reached before the decline
  Trough Value = the lowest value reached after that peak,
                 before a new high is set
  Result       = the largest such drop over the whole period
                 (always negative or zero)

The mechanics work like this. You walk through the fund's value day by day (using total return — price plus reinvested distributions — not price alone). At each point you track the highest value seen so far, the "running peak." Whenever the current value sits below that running peak, you are in a drawdown, and its size is (current − peak) / peak. The maximum drawdown is simply the most negative of all those readings across the entire window.

A quick walkthrough. Suppose a fund's total-return value moves like this:

• Rises to a peak of $120.
• Falls to a trough of $90.
• Recovers over the following months back above $120.

The drawdown at the trough is (90 − 120) / 120 = −0.25, or −25%. If no other decline in the period was deeper, −25% is the fund's maximum drawdown. The recovery time is the number of months from the $90 bottom until the fund first prints a value above the old $120 peak — a separate figure that matters just as much as the depth.

Rule of thumb: always pair the depth of a drawdown with its recovery time. A −40% drop that heals in eight months is a very different experience from a −25% drop that takes four years to recover — especially if you are selling shares for income the whole way down.

Why It Matters

Two funds can share an identical annual return, and even a similar volatility reading, yet put you through wildly different worst moments. Volatility and standard deviation are *averages* — they smooth the whole period into one typical-swing number. Maximum drawdown refuses to average. It isolates the single worst peak-to-trough stretch, which is exactly the moment investors are most likely to panic and sell.

For income and ETF investors, this is often the more honest risk gauge, and for two reasons.

First, behavior. A −50% drawdown is not just a statistic; it is the point at which many people abandon a good long-term plan at the bottom. Knowing a fund's historical maximum drawdown ahead of time is a stress test for your own stomach.

Second, and more importantly, sequence risk. A retiree who is *withdrawing* money does not have the luxury of simply waiting for a recovery. Selling shares to fund living expenses while the fund is deep in a drawdown permanently removes shares that can never participate in the rebound. This is why drawdown, not volatility, is frequently the risk that actually sinks a retirement plan — a dynamic explored in sequence-of-returns risk.

Maximum drawdown also exposes a trap unique to the high-yield world: a fat yield does not protect you from a deep drawdown. A fund can advertise a 12% distribution and still have fallen 45% peak-to-trough in a downturn. The income keeps arriving, but the principal it is paid from can crater — and if the payout is partly return of capital, a deep drawdown can turn "income" into a slow liquidation of your own money.

Example

Consider three funds an income investor might weigh against each other through a single market downturn: SCHD, a dividend-growth ETF; a broad-market S&P 500 index fund; and SPYI, a covered-call income fund. The numbers below are illustrative and labeled as such — they are shaped to show the pattern, not to report any fund's exact history.

A few lessons fall out of this table. The covered-call fund (SPYI) had the shallowest drawdown — its option premium cushioned the fall — yet the longest recovery, because capped upside means it lags the sharp rebound that usually follows a bottom. The dividend-growth and index funds fell further but healed faster. And note the yield column: the 11% payer did not have the smallest drawdown by a wide margin, and its slow recovery meant an investor selling shares for income spent the longest stretch underwater. High yield and shallow drawdown are not the same thing.

Now the second, more consequential example: why drawdown matters more than volatility for a retiree drawing income. Picture two retirees, each starting with $500,000 and withdrawing $25,000 a year. Both hold funds with roughly the same *volatility*, but Fund A suffers a −20% maximum drawdown early in retirement while Fund B suffers a −40% drawdown at the same moment.

The retiree in the deeper drawdown is selling shares to fund that $25,000 while the fund is down 40% — locking in the loss on every share sold and permanently shrinking the base that has to recover. Even if both funds eventually post identical average returns, the deeper-drawdown retiree can run out of money years sooner. Their *volatility* was similar; their *outcomes* were not. This is sequence-of-returns risk in action, and it is why maximum drawdown belongs on any withdrawal-stage dashboard right next to yield.

How Drawdown Complements Volatility

Maximum drawdown does not replace standard deviation or volatility — it completes them. Think of it as a division of labor:

• Standard deviation / volatility answers *"how bumpy is the ride on a typical day?"*

It is an average of all the swings, up and down, across the whole period.

• Maximum drawdown answers *"how bad was the single worst stretch, and how long did I

spend underwater?"* It ignores the average and zooms in on the deepest wound.

The two can disagree in revealing ways. A fund can have modest day-to-day volatility yet still deliver a brutal, grinding drawdown during a prolonged bear market. Conversely, a fund with high volatility that always snaps back quickly may have a smaller maximum drawdown than its jumpy chart suggests.

Because standard deviation treats an upside spike as "risk" exactly like a downside drop, it can overstate the danger of a fund that mostly surprises to the upside. The Sortino ratio fixes this by counting only downside volatility, and maximum drawdown pushes the idea further still — it cares about *nothing* but the worst realized loss. Read together, volatility tells you the texture of the ride, the Sortino ratio isolates the downside, and maximum drawdown marks the deepest crater.

This is also why a high-yield fund can still have deep drawdowns. Yield is paid out of whatever the fund earns and holds; it says nothing about how far the underlying portfolio can fall. A fund can pay 10% and drop 45% peak-to-trough, and the two facts live happily side by side. Judging a high-yield fund on its distribution while ignoring its drawdown is how income investors get blindsided in a downturn.

Common Mistakes

• Reading maximum drawdown from price alone. For an income fund, price return ignores

the distributions that soften the decline. Always compute drawdown on total return (price plus reinvested distributions), or a high payer will look worse than it was.

• Ignoring recovery time. Two funds can share a −30% maximum drawdown, but one

recovers in a year and the other takes five. Depth without duration is half the story — and duration is what hurts a retiree drawing income.

• Assuming a high yield means a shallow drawdown. They are unrelated. A fat

distribution rate offers no protection against a deep peak-to-trough fall; some of the highest-yielding funds have the worst drawdowns.

• Comparing drawdowns over different time windows. A fund measured only through a calm

bull market will show a tiny maximum drawdown that says nothing about how it behaves in a crash. Compare funds over the *same* period that includes at least one real downturn.

• Treating past maximum drawdown as a ceiling. A −30% historical worst case is not a

promise the future cannot be worse. It is the deepest hole *so far*, not a guaranteed limit.

• Using it as your only risk measure. Maximum drawdown captures depth of loss but not

the everyday ride. Read it alongside standard deviation, volatility, and the Sortino ratio, not instead of them.

FAQ

What is a good maximum drawdown?

Lower (shallower) is better, but "good" depends entirely on the asset class. Broad equity and dividend ETFs have historically fallen 30-55% in major bear markets, so over a window that includes one of those bears, a maximum drawdown of −30% to −55% is normal for a diversified stock fund; over calmer multi-year stretches, −20% to −35% is more common. Bond and conservative allocation funds usually show much shallower drawdowns. There is no universal threshold — always compare a fund's maximum drawdown against peers over the same window, and weigh it against how long the fund took to recover.

What is the difference between maximum drawdown and volatility?

Volatility (standard deviation) measures the *average* size of a fund's swings over a period — the typical bumpiness of the ride. Maximum drawdown measures the *single worst* peak-to-trough loss, ignoring the average entirely. A fund can have low volatility and still suffer a deep drawdown in a prolonged decline, or high volatility yet a modest drawdown if it always snaps back. Volatility describes the texture of the ride; maximum drawdown marks the deepest crater. Read them together, not as substitutes.

Why does maximum drawdown matter more for retirees?

Because retirees are usually *withdrawing* money, not just holding. Selling shares to fund expenses while a fund is deep in a drawdown permanently removes shares that can never share in the recovery, which can drain a portfolio years sooner than the averages would suggest. This is sequence-of-returns risk, and it is why a deep early-retirement drawdown is far more dangerous than the same drop would be for a young investor who is still adding money.

Can a high-yield fund still have a deep drawdown?

Absolutely. Yield and drawdown are unrelated. A fund's distribution says nothing about how far its underlying portfolio can fall — a fund can pay 10% or more and still drop 40%-plus peak-to-trough in a downturn. Worse, if part of that payout is return of capital, a deep drawdown means the "income" is partly a liquidation of your own principal. Never treat a high yield as evidence of a shallow drawdown.

Does maximum drawdown include the recovery?

No. Maximum drawdown measures only the depth of the fall — from peak to trough. The time it takes to climb back to the old peak is a separate figure, often called the recovery period or time to recover. Both matter: depth tells you how much you lost at the bottom, and recovery time tells you how long you spent underwater. A shallow drawdown with a very long recovery can be just as painful as a deep one that heals quickly, especially if you are selling shares for income along the way.

How is maximum drawdown calculated?

You track a fund's total-return value over time and record the highest point reached so far (the "running peak"). Whenever the current value is below that peak, you are in a drawdown equal to (current − peak) / peak. The maximum drawdown is the most negative of all those readings across the whole period. For example, a fund that peaks at $120 and troughs at $90 has a drawdown of (90 − 120) / 120 = −25%; if no deeper decline occurs in the window, −25% is its maximum drawdown.