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Intermediate·8 min read

How to survive a market crash: a framework decided in advance

What to do when everything falls at once, written for you to read now, calmly, so that the decisions already exist when you need them.

Read this now, while nothing is falling. That is the entire point of it: a crash is precisely when you are least capable of thinking clearly, so the thinking has to be done beforehand.

What normal looks like

Substantial declines are a recurring feature of equity markets, not an aberration. Any investor with a multi-decade horizon should expect to live through several, including some severe ones.

This matters because the first one always feels like a special case, like this time something is structurally different. Sometimes something is. The response is still the same.

What actually determines your outcome

Not whether you predicted it. Nobody reliably does. What determines your outcome is whether you are forced to sell.

An investor who can leave their portfolio alone experiences a decline as a temporary paper loss. An investor who needs the money (because there is no emergency fund, or because they borrowed to invest) converts that paper loss into a permanent one at the worst available price.

Which is why the emergency fund and the no-leverage rule are not conservative fussiness. They are what buys you the ability to do nothing.

The order of operations during a decline

  1. Do nothing for a week. No selling, no buying, no changes. The urge to act is at its strongest and your judgement at its weakest in the first days.
  2. Check your actual situation. Is your emergency fund intact? Is your income secure? Do you need any of this money in the next three years? This is a factual review, not an emotional one.
  3. Read your written thesis for each holding. Has anything changed about the businesses, or only about their prices? These are different questions and the distinction is everything.
  4. Sell only where the thesis is genuinely broken. Not because a price fell, but because a fact you relied on stopped being true.
  5. If you have cash and your emergency fund is intact, consider buying, gradually, into your existing plan, not in a single decisive move.

What to avoid

  • Checking prices constantly. It changes nothing except your stress level, and stress is what produces the sale.
  • Selling everything to "wait for clarity". Clarity arrives after the recovery, not before it. People who exit rarely re-enter in time.
  • Doubling down on a single falling position to average down. Averaging into a broken thesis is how a small mistake becomes a large one.
  • Borrowing to buy the dip. Leverage is what turns a survivable decline into a permanent loss.
  • Taking advice from anyone who claims to know where the bottom is.

The uncomfortable truth about buying

Declines are when future returns are highest, because you are paying less for the same businesses. Everyone accepts this in principle and almost nobody acts on it, because it requires buying at the moment it feels most dangerous.

The practical solution is a rule, not resolve. Something like: "If the market falls 20%, I will invest an additional fixed amount, in three instalments a month apart." Written now, executed then, without a fresh judgement required at the time.

Afterwards

When it is over, write down what you actually did and how you actually felt. That record is the most accurate risk-tolerance assessment you will ever have, far better than any quiz, including ours.

If you discovered you could not sleep, the honest response is to hold a smaller equity allocation. That is not failure. An allocation you can hold through a decline beats a theoretically optimal one you abandon at the bottom.

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