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Intermediate
7 min read

What Happens When Markets Crash

Crashes share a recognisable pattern, and behaviour during them decides most outcomes.

The short answer

Severe market declines tend to share a recognisable pattern — fast drops, confident predictions of further collapse, and a feeling of permanent change — and history shows recoveries have followed, though never on a knowable schedule. Most of the damage investors experience in a crash comes from their own reaction, not from the decline itself.

What you'll learn

  • Describe the recognisable pattern that severe market declines tend to share
  • List the behavioural mistakes that most often turn a decline into a permanent loss
  • Explain what a written crash plan looks like before a decline happens

The shape of a crisis

Severe declines tend to arrive faster than recoveries, are accompanied by confident predictions of further collapse, and feel like a permanent change in circumstances while they are happening.

Broad markets have historically experienced major declines including 1929, 1973–74, 1987, 2000–2002, 2008–2009 and 2020. Each was followed by recovery over subsequent years, but the timing was never knowable in advance and no future recovery is guaranteed.

What tends to go wrong

The damage is usually self-inflicted.

  • Selling diversified holdings near the bottom
  • Stopping contributions exactly when prices are lowest
  • Moving to cash and waiting for a signal that never clearly arrives
  • Concentrating into whatever recently fell least

Why selling near the bottom happens

A decline is loudest exactly when it is furthest along, because that is when it has generated the most news coverage and the most fear. Investors often act on the volume of alarming information rather than on any new evidence about their own specific holdings, which is precisely backwards from a research-based approach.

What a plan looks like

Decide in advance what you will do during a 30% decline, write it down, and keep contributions automatic. A decision made calmly is worth more than any forecast made during the event.

Why this matters

Your behaviour during two or three bad months can outweigh a decade of good selection.

How this connects to Intelligent Accumulation

Automatic, scheduled contributions are the single most direct defence against stopping investing exactly when prices are lowest.

Read the full approach

Terms used in this lesson

Bear market
A sustained decline in a market, conventionally 20% or more from a recent high.
See the full glossary

Check your understanding

No score is recorded. This is only here to test whether the lesson landed.

1. According to historical patterns of market crashes, what tends to accompany a severe decline?

Key takeaways

  • Severe declines share a recognisable pattern of speed, alarm and a feeling of permanence
  • Most damage in a crash comes from investors' own reactions, not the decline itself
  • Selling near the bottom and stopping contributions are the two most common mistakes
  • A written plan decided in advance replaces panic with a pre-made decision

Related concepts

Written by
Suggested Investments Research Team
Content type
Educational article
Published
2026-09-13
Last reviewed
2026-09-13

Sources and methodology

Understanding DrawdownsYour Brain Can Be an Investing Risk

Educational content only. This lesson is not investment, tax or legal advice and does not recommend buying or selling any specific investment. All investing involves the risk of loss.