How to prepare for a market crash before it happens

This page is educational and does not constitute personalized investment, tax, or legal advice. Clockwise Capital is a registered investment adviser. No one — including us — can reliably predict market timing. The actions discussed below are frameworks; whether and how they apply depends on your specific situation.

The hard part about preparing for a crash is that it is not very satisfying. There is no big reveal, no clever trade, no moment of feeling smart. It is mostly small, structural choices made when nothing is wrong, so that nothing is wrong when something goes wrong. The investors who emerge from downturns in better shape are almost never the ones who predicted them. They are the ones whose plans worked regardless.

This page walks through the concrete pre-work — stress-testing, allocation, cash buffer, behavioral guardrails, and a written plan — that history suggests matters. None of it requires knowing when a crash will arrive.

The first step is stress-testing what you actually own

Before you do anything else, run a simple thought experiment: if your equity holdings dropped 30% tomorrow and stayed there for two years, what happens to your life? For most working-age investors with a long horizon and a stable paycheck, the answer is "not much" — contributions continue, prices are now lower, and the eventual recovery captures the discount. For pre-retirees and retirees, the answer is more nuanced. A sustained drawdown that coincides with retirement spending creates sequence-of-returns risk, where withdrawing from a depleted portfolio locks in losses that gross-up averages can't repair.

To stress-test concretely:

• Apply a 30%–50% decline to your equity holdings. Leave investment-grade bonds and cash roughly flat (history shows they are more resilient, though not immune in every scenario).
• Subtract one year's worth of essential spending from the resulting balance, since you will likely have spending needs during the drawdown.
• Compare the post-shock, post-spending balance to the level you would need to remain on track. If the gap is uncomfortable, your equity exposure is more aggressive than your situation supports.

The Federal Reserve Bank of New York publishes household balance sheet data showing that during 2008–2009, a meaningful share of households were forced to sell equities to fund spending — turning a market drawdown into a permanent loss. That is the scenario stress-testing exists to prevent.

If the stress test reveals trouble, the answer is not to predict the crash; it is to reduce equity exposure modestly now, before you are reacting under pressure. Moving from 80% equities to 70% during calm markets is a different decision than moving from 80% to 30% during a panic.

Allocation should match your risk capacity, not your risk appetite

Risk appetite is what you feel comfortable with on a calm Tuesday. Risk capacity is what your situation can actually absorb without forcing a behavior change. The two often diverge — investors with significant capacity sometimes hold too little equity because volatility scares them, and investors with limited capacity often hold too much because they want higher returns. Both errors hurt.

A working framework, drawing on common practitioner heuristics:

• Time horizon dominates. Money you need in less than three years should not be in equities. Money you don't need for fifteen-plus years can be heavily in equities, regardless of your emotional response to volatility.
• Income stability matters. A tenured professor and a self-employed consultant with the same age and net worth have very different risk capacities. Variable-income investors should hold a larger cash buffer.
• Spending flexibility matters. Households that can cut spending materially during a downturn (discretionary travel, big-ticket purchases, charitable giving) have more capacity for equity exposure than households whose spending is mostly fixed.
• Behavioral history matters. If you sold in March 2020 and felt regret as the market recovered, your real risk capacity is lower than your appetite suggested. Match your allocation to who you actually are, not who you wish you were.

Common allocation glide paths — like target-date funds — apply a generic version of this thinking. They work surprisingly well as a default for people who do not have specific factors (concentrated stock, business ownership, large pension) that argue otherwise.

A cash buffer is not a market call — it is matching assets to liabilities

The single most useful thing a pre-retiree or retiree can hold before a downturn is enough cash and short-duration bonds to fund spending for a multi-year window without touching equities. The rationale is not "I think the market will crash" — it is "I would rather not sell stocks at a low to pay this year's bills."

Common structures:

• Three buckets. A cash bucket (one to three years of essential expenses), an intermediate bucket (three to seven years in high-quality bonds), and a growth bucket (the rest in equities). Spending comes from the cash bucket, which is refilled from intermediate, which is refilled from growth — but only on your schedule, not the market's.
• The "five-year rule." A simpler version: hold five years of equity-substitution spending in non-equities. Five years covers the median post-WWII bear market recovery window with a margin.
• Match-funded liabilities. Known specific spending (a child's college bill in three years, a planned home purchase, an estimated tax payment) should be funded from instruments that mature on or before the spending date — Treasuries or CDs, not equities.

The opportunity cost of cash is real. Over a 30-year period, holding a meaningful cash position will lag a fully-invested equity portfolio. The point is that for the household that ends up needing the cash during a drawdown, the lower long-run return is the price of not being a forced seller. That is usually a price worth paying for the segment of money tied to near-term spending.

Write down what you will and will not do — before you need it

Studies of investor behavior consistently find that people who write a plan before a crisis follow it during the crisis; people who decide in the moment generally don't. Yet a remarkable number of investors with significant assets have nothing in writing. An Investment Policy Statement does not need to be a formal legal document. One page is enough. It should answer:

• What is my target allocation, and what tolerance bands trigger rebalancing? (Example: 70/30 equity/bond, rebalance when either drifts five percentage points.)
• What will I do if equities drop 20%? 30%? 50%? (Example: continue contributions, rebalance through the drawdown, do not sell from equities to fund spending.)
• What will I not do? (Example: I will not sell equities during a market decline of any size to fund discretionary expenses.)
• Who else has a copy? (Spouse, advisor, sometimes an adult child for the older household.) Plans you have to defend out loud get followed.

Writing this when nothing is wrong is much easier than writing it when something is. And the value of the document is mostly that it exists — having to read it back to yourself in March of a bad year reduces the temptation to improvise.

Behavioral guardrails matter more than any indicator

You cannot control the market. You can control how often you check it, how easily you can act on impulse, and what you have set up to slow yourself down. A short list of guardrails the research supports:

• Reduce check-frequency. Quarterly is plenty for most long-term investors. Morningstar's "Mind the Gap" research and academic studies of myopic loss aversion show that frequent monitoring increases the felt pain of volatility and the urge to act.
• Automate. Automatic contributions, automatic rebalancing, and automatic cash sweeps remove decisions from emotion. The decisions you don't make on a bad market day are decisions you can't make badly.
• Cooling-off rule. A self-imposed 48-hour delay on any meaningful trade after a market move greater than 5% catches most panic decisions before they are executed.
• Two-person veto. For larger households, agree that no portfolio change above a defined threshold happens without both spouses signing off. This is the most boring possible behavioral hedge and one of the most effective.

Insurance is the unglamorous half of preparing for downside

A market drawdown alone is recoverable. A drawdown combined with an uninsured medical bill, a disability that cuts income, an underinsured home loss, or a liability lawsuit is the combination that turns a temporary loss into a permanent one — because it forces selling at the worst time. Adequate health, disability, term life (if dependents exist), umbrella liability, and — for older households — long-term care or self-insurance for the same risk are part of crash preparation, not separate from it.

This is also where the value of a fiduciary advisor often shows up most concretely. Coordinating insurance, taxes, and investments — and making sure no single shock can force liquidation at a low — is exactly the kind of household-level planning a generic robo cannot do. If you want a structured second opinion on whether your plan is actually crash-resilient, that is a conversation worth having before headlines force it. For a related framework on the advisor question, see Is your financial advisor actually worth what you're paying?.

Preparation is most of the work

By the time a crash arrives, the window for thoughtful preparation is mostly closed. The investors who do best in downturns are not the ones who predicted them — they are the ones who, on a calm Tuesday years earlier, stress-tested their plan, set a defensible allocation, built a cash buffer, wrote down their rules, set up guardrails, and made sure no single shock could force them to sell. None of that is dramatic. All of it compounds.

The next page in this cluster — Signs of a market crash — looks at the indicators most often cited as crash predictors and what their actual track record shows. The short version: the preparation above is more reliable than any indicator, by a wide margin.