Behavior
The price of admission: what to do when your portfolio falls 30%
Drawdowns are not a malfunction of investing. They are the fee you pay for the returns, and the fee is not optional.
Every essay in this section so far has been about the things you control: your savings rate, your order of operations, your choice of fund, your spending leaks. This one is about the thing you don't control, and which will do more damage to your outcome than all of those combined if you handle it badly.
At some point (nobody can tell you when) you will open your account and find that a large chunk of it is gone. Not because you did anything wrong. Because that is what markets do. The question isn't whether it happens. It's what you do in the ninety seconds after you see the number.
The uncomfortable arithmetic of getting back to even
Start with the part most people get wrong. A fall and the recovery from it are not symmetrical, because the recovery is calculated on a smaller base:
Worked example
What it takes to get back to where you started
- A 10% fall needs a gain of
- 11.1%
- A 20% fall needs a gain of
- 25.0%
- A 30% fall needs a gain of
- 42.9%
- A 50% fall needs a gain of
- 100.0%
This is why deep losses are so dangerous and why avoiding catastrophic, concentrated bets matters more than catching winners. Halving your money means you need to double what's left just to be back where you began.
Now the more useful half of that arithmetic. At a 7% annual return, with no new money added at all, a 20% drawdown takes about 3.3 years to recover, a 30% drawdown about 5.3 years, and a 50% drawdown about 10.2 years. Those are long stretches, but they are finite, and they assume you contribute nothing further, which almost nobody does. Add ongoing contributions and the timelines compress considerably.
The cost of flinching
Here's the part that actually determines your outcome. The drawdown itself is temporary. Selling into it is permanent.
Take two people with identical $200,000 portfolios. The market falls 30%; both are down to $140,000. One does nothing. The other can't stand it, sells to cash, and, as almost everyone does, waits to feel confident again before reinvesting. Say that takes three years.
Worked example
$140,000 at the bottom · 20 years · 7% invested, 2% in cash
- Investor A (holds throughout
- $541,756
- Investor B) 3 years in cash, then reinvests
- $469,302
- Cost of the three-year flinch
- $72,453
Roughly 36% of the original portfolio, surrendered not to the crash but to the reaction to it. And this is the generous version: Investor B reinvests after three years. Plenty of people who sell in a panic never fully get back in.
The crash took nothing from Investor A. It took $72,000 from Investor B, and it did so on the way back up, not on the way down.
Why a falling market is good news if you're still buying
If you're in the accumulation phase (still working, still contributing every month) a market decline is not a loss. It's a discount on everything you're about to buy.
Worked example
$1,000 monthly contribution into a fund
- At $100 per share
- 10.0 shares
- After a 30% fall, at $70 per share
- 14.3 shares
- Extra shares for the identical dollar
- +42.9%
The same paycheck buys 43% more ownership. Every share bought at the bottom is the one that compounds hardest on the way back up. Suspending contributions during a decline, the instinct almost everyone has, means skipping the cheapest shares you will ever be offered.
The reversal is worth sitting with: a falling market is bad for the money you already have and good for every dollar you have yet to invest. If your investing career has decades left, the second group is much larger than the first.
What actually protects you
Not a forecast. Nobody reliably calls tops and bottoms, and the people who sound most certain about it are selling something. Three unglamorous things do the work instead:
- The emergency fund. This is the real answer, and it's why it sits on rung three of the waterfall. What converts a paper loss into a permanent one is being forced to sell, a job loss, a car transmission, a medical bill arriving in the same month the market falls. The funded investor rides it out. The unfunded one liquidates at the bottom because they have no choice. Volatility doesn't crystallize losses; forced selling does.
- An allocation you can actually sleep with. The best portfolio isn't the one with the highest expected return. It's the highest-returning one you'll hold through a bad year. If a 30% decline would make you sell, you were overexposed at 100% equities, and the honest fix is a lower allocation you'll stick with, not a promise to be braver next time.
- A decision made in advance. Write down now what you'll do if your portfolio falls 30%: keep contributing, rebalance on a schedule, change nothing else. Deciding during the fall means deciding while frightened, and frightened decisions are reliably worse.
The bottom line
Long-run stock returns are not a gift. They are compensation, payment for tolerating exactly the experience of watching a third of your money vanish and not acting on it. If the decline could be avoided, the return wouldn't exist. That is the trade.
So the plan for the next crash is unglamorous and can be written in one line: keep the emergency fund funded, keep contributing, don't sell, and don't check the balance more often than your plan requires. The market's job is to be volatile. Yours is to still be holding at the end.