What to Do in a Stock Market Crash (2026)

Market crashes are terrifying in the moment — and they’re also where fortunes are quietly made or destroyed, depending on how you behave. The hard truth is that most of the damage in a crash isn’t done by the crash itself; it’s done by investors reacting badly to it. Here’s how to handle one.

First: expect them

Crashes and bear markets are a normal, recurring part of investing, not a freak event (see bull vs bear markets). Markets have fallen hard many times and recovered every time so far. Knowing a crash will come someday — and having decided how you’ll act before it does — is half the battle.

The problem is that knowing this intellectually and feeling it when your portfolio is down 30% are completely different things. That’s why preparation matters more than knowledge.

The mistakes that destroy wealth

• Panic-selling at the bottom. The single most expensive move an investor can make: turning a temporary paper loss into a permanent one, then missing the recovery that follows (see surviving drawdown).
• Trying to time the exact bottom. Almost nobody does it consistently. Waiting for “certainty” before re-entering means missing the strongest rebound days — and a handful of those days account for a huge portion of long-term returns.
• Checking your portfolio obsessively. It amplifies fear and tempts bad decisions. Every red number feels like a call to action when really the best action is often no action.
• Abandoning your plan. A crash is exactly when discipline pays — and when most people throw it away (see why rules beat gut feel).

What to actually do

1. Don’t panic-sell. If nothing has changed about your long-term plan, a lower price is not a reason to sell — it’s the market on discount. The urge to “stop the bleeding” is the single most destructive instinct in investing.
2. Keep contributing if you can. Regular investing during a crash buys at lower prices — historically one of the most powerful long-term advantages (see dollar-cost averaging).
3. Lean on your emergency fund, not your portfolio. This is why you hold cash separately — so you never have to sell investments at the worst time to cover bills or unexpected expenses.
4. Rebalance if your plan calls for it. A crash can push your allocation far out of line; rebalancing can mean buying what’s cheap and restoring your intended risk level (see asset allocation).
5. Zoom out. Look at a long-term chart. Today’s terror is often a blip at decade scale. Every major crash in history — 2008, 2020, the dot-com bust — looks like a dip on a long enough chart.

The real lesson: prepare before, not during

You can’t make calm decisions in a panic if you haven’t decided anything in advance. The best crash protection is built beforehand:

• An allocation you can actually hold through a bad year, not one that looks good on paper (see risk tolerance).
• An emergency fund in cash, so you’re never a forced seller.
• Diversification across asset classes and geographies.
• A rules-based plan that tells you what to do so emotion doesn’t have to. A system removes the one thing a crash weaponises — your fear (see rules-based investing).

FAQ

Should I sell during a stock market crash?

Usually not, if your long-term plan hasn’t changed. Panic-selling turns temporary losses into permanent ones and risks missing the recovery. Historically, investors who held through crashes — and kept contributing — fared far better than those who sold.

Should I keep investing during a crash?

If you can afford to, yes — regular investing during a crash buys at lower prices, which has historically been a strong long-term advantage. Use your emergency fund for expenses so you’re never forced to sell investments at the bottom.

How do I prepare for a market crash?

Before one hits: set an allocation you can hold through a drop, keep an emergency fund in cash, diversify, and have a rules-based plan that tells you what to do. Preparation beforehand is what lets you stay calm when it happens.

Is this financial advice?

No. This is educational content. Investing involves risk, including loss of principal; decisions are your own.

Conclusion

In a crash, your behaviour matters more than the crash: don’t panic-sell, keep contributing if you can, rely on your emergency fund, and follow a plan set in advance. The damage is usually self-inflicted — and avoidable. A rules-based approach removes the fear that drives the worst decisions. EXCAVO STOCKS is built on exactly that discipline — see how it works.

This is educational content, not financial advice. Investing involves risk, including loss of principal. Past performance does not guarantee future results.