Bear markets are normal parts of long-term investing, but their timing, duration, and severity are unpredictable. They can result from recession fears, financial stress, valuation declines, policy changes, or shocks that alter expectations.
Key Takeaways
- Broad, sustained decline: Bear markets are more severe than ordinary market pullbacks.
- 20% is a convention: The threshold is widely used but does not have legal or universal status.
- Rallies can occur inside bear markets: Sharp rebounds do not always signal the downturn is over.
- Behavioral risk rises: Fear can lead investors to sell after losses and miss later recoveries.
How a Bear Market Is Defined
In common market usage, a bear market is a period of falling stock prices and pessimistic sentiment, generally using a 20% or greater decline in a broad market index over at least a two-month period as the benchmark.
As with bull markets, the exact start and end dates are often determined after the fact. Different indexes can also reach bear-market thresholds at different times.
Bear Market vs. Correction
A correction usually refers to a smaller decline, commonly around 10% from a recent high, while bear-market terminology is generally reserved for deeper and more sustained losses.
| Market move | Common description |
|---|---|
| Smaller short-term decline | Pullback |
| Roughly 10% decline from a recent high | Correction |
| Roughly 20% or greater sustained decline | Bear market |
These thresholds are conventions rather than rules that determine what investors should do.
What Can Cause a Bear Market?
Recessions, rapidly rising interest rates, financial crises, collapsing profits, wars, bubbles unwinding, credit stress, and abrupt changes in investor expectations can all contribute to broad declines.
Markets can also fall before an economic recession officially begins because investors price in expected weakness rather than waiting for backward-looking data.
Bear-Market Rallies
Bear markets can contain powerful short-term rallies. Prices can rise sharply as investors cover short positions, valuations become more attractive, policy expectations change, or sentiment temporarily improves.
Why Selling During a Bear Market Can Be Costly
Selling after a large decline turns a paper loss into a realized loss and creates a second decision: when to buy back. Investors who wait for obvious good news can miss an early part of the recovery because markets often rise before economic conditions feel comfortable.
That does not mean every investment should always be held. A position can still be unsuitable, overconcentrated, or fundamentally impaired. The distinction is between a planned portfolio decision and a panic response to market direction.
How Diversification and Rebalancing Help
A diversified portfolio can reduce dependence on one company, sector, or asset class, although broad bear markets can still produce losses across many holdings.
Rebalancing can restore target weights when declining stocks fall below their intended allocation, provided the original strategy still matches the investor’s goals and risk capacity.
Bear Markets and Time Horizon
Investors with near-term spending needs face greater risk because they may be forced to sell during a decline. Long-term investors have more time for markets to recover but are not guaranteed a particular outcome.
Maintaining adequate cash reserves and aligning asset allocation with withdrawal timing can reduce the chance that a downturn disrupts an essential financial goal.