The costliest mistake in a market crash: the exit door
When markets fall hard, the most expensive mistake is often not the drop itself. The real cost comes from panicking out and missing the recovery.
In Brief
- $10,000 invested in the S&P 500 in 1987 and left alone until the end of 2025 grows to about $616,000.
- Missing the five best years over the same period cuts the result to $175,000.
- Regular buying can leave results clearly better than a one-off investment, even in the worst periods.
Not timing, giving up
Market timing is rarely a deliberate game. More often, it is the moment of realizing losses can grow this fast and saying “enough.”
Heading for the exit as 20% of assets melt away in a first bear market cuts off the full power of compounding. Compound growth only works when you stay on the road.
The missed years in numbers
Over a working life of roughly 40 years, $10,000 left in the market reaches $616,000. The picture changes quickly once a few recovery years are missed:
- Missing the single best year: about $448,000
- Missing the best three consecutive years: about $273,000
- Missing the five best years: about $175,000
The best years usually come right after the scariest periods. The recoveries after 1987, the 2000s and the Great Recession are examples.
How an exit turns into a long absence
Nobody decides to “sit out for a year.” Bad news tends to pile up: a falling market, family troubles, election uncertainty. People exit to stop the pain.
Then the market starts to recover. After one missed year comes waiting for the next bear market, and three years pass. The result is feeling both the pain of the fall and the pain of watching everyone else recover.
Taking emotion out of the equation
The fix is to separate the decision from emotion. First, asset allocation and diversification are set; then regular buying continues in every condition.
With regular buying, a drop means more shares for the same money. Seen this way, a 20% decline reads like a discount, and shares quietly stack up.
The worst example is the Great Depression. For about 25 years the market barely moved; buying on day one and holding earned nothing. Buying regularly every year over the same period ended with a clearly positive annual return.
Key Assets
| Asset | Outlook | Why? | Key Level |
|---|---|---|---|
| S&P 500 (long term) | Positive | Strong compounding over 40 uninterrupted years | $10k → $616k |
| Waiting out of the market | Negative | Best years usually follow the declines | $175k after missing 5 years |
| Regular buying | Positive | More shares in drops, fewer emotional decisions | Returns even in the Great Depression |
What to Watch
- In a bear market, 20% losses push the risk of panic selling to its peak.
- Waiting for the right time to return after exiting can easily stretch the missed years.
- If asset allocation does not match the volatility a person can bear, keeping up regular buying gets harder.
This note was compiled from open-source data and content available online; it does not constitute investment advice.
This article is for general information only and is not investment advice.