When Markets Crash: What Actually Happens and What to Do

Somewhere between reading this and retiring, your investments will fall 20%, probably 30%, possibly more. This is not pessimism — it is the historical base rate. Crashes are a scheduled feature of equity investing, unscheduled only in their timing. What they cost you is decided almost entirely by your behaviour when they arrive.

What a crash feels like from inside

From outside, crashes look like buying opportunities on a chart. From inside they feel like the chart-reader never mentions: every headline explains why this time is genuinely different (it always is — that is what makes it convincing), your pot shows losses equal to years of contributions, and doing nothing feels reckless while "moving to cash until things settle" feels prudent. This feeling is the mechanism by which ordinary investors convert temporary declines into permanent losses.

What every crash has had in common

1987, 2000–03, 2008–09, 2020, 2022: different causes, same shape. Sharp fall, cascade of expert pessimism, a bottom nobody rang a bell for, then a recovery that began while the news was still terrible. Diversified global markets have recovered from every crash in history and gone on to new highs — recoveries taking months (2020) to several years (2000s). Two corollaries. First, the recovery's best days cluster inside the panic: miss the handful of strongest days by sitting in cash and you forfeit a startling share of the rebound. Second, "the market always recovers" applies to diversified markets — individual companies and sectors can go to zero and stay there, which is the case for diversification in one sentence.

Your crash plan, written in advance

• Keep contributing. Your monthly direct debit is now buying units at a discount. The contributions made at the bottom of a bear market are historically the best-performing money most investors ever invest.
• Do not look daily. Checking a falling portfolio is self-harm with charts. Quarterly is plenty; the value that matters is decades away.
• Do not sell equities to “wait it out”. Selling converts a paper loss into a real one and replaces one decision with two (when to get back in — nobody solves that one).
• Rebalance if your plan says so. A crash leaves you underweight equities; rebalancing buys them cheap on schedule, mechanically, without requiring courage.
• Re-read your time horizon. Money needed within five years should not have been in shares (see cash vs investing); money needed in 2050 has lost nothing that matters yet.

The reframe that helps

If you are decades from spending this money, you are a net buyer of investments for years to come — and buyers should welcome lower prices. A 30% fall means every pound you invest this year buys 40% more units than it did last year. The investors who came out of 2009 and 2020 ahead were not the ones who predicted anything; they were the ones whose plan survived contact with the panic. Write yours now, while markets are boring — it is the highest-return document in personal finance.

This is general education, not personalised financial advice. Investing involves risk, including the risk of losing money, and past performance is not a guide to future returns. Nothing here recommends any specific investment — for anything genuinely complex or high-stakes, speak to a regulated financial adviser.