Key Takeaways
- Bull markets signal broadly rising prices; bear markets signal broadly falling prices — each conventionally defined by a 20% threshold.
- These labels describe historical trends after the fact, not reliable forecasts of what comes next.
- Market conditions affect different investments differently — bonds, for example, may behave inversely to stocks.
- Long-term investors have historically weathered multiple bear markets without abandoning their strategies.
- Reacting emotionally to market labels often causes more harm than the market conditions themselves.
- A diversified, goal-aligned investment plan matters far more than correctly identifying a bull or bear phase.
Bull and Bear Markets
A bull market describes a period when stock prices are broadly rising — typically defined as a gain of 20% or more from a recent low. A bear market is the opposite: a broad decline of 20% or more from a recent high. These terms describe the general direction of a major market index, such as the S&P 500, over a sustained period.
The 20% threshold is a widely used convention, not a regulatory definition. Analysts and financial media may apply the terms differently depending on context, index, or asset class.
Where the Terms Come From — and What They Actually Measure
The bear and bull metaphors have been part of financial language for centuries. The most cited explanation is that bulls thrust their horns upward when attacking, while bears swipe downward — movements that mirror the price directions each label represents. Whatever the true origin, the terms have stuck.
What they measure is the direction of a broad market index — most commonly the S&P 500 in the U.S. context — over a meaningful stretch of time. A single bad week doesn't make a bear market. A single strong month doesn't define a bull market. The labels apply when a sustained trend of roughly 20% or more has developed from a clear turning point.
That distinction matters because short-term price swings — which happen constantly — are something different. Market volatility is a normal feature of investing, not a sign that a bear or bull phase has begun. Conflating daily noise with larger market cycles leads to poor decision-making.
14
Bear markets in the S&P 500 since 1928
Historical analysis from various financial research sources counts roughly 14 bear markets in U.S. equities over the past century, varying slightly by definition used.
~9.6 months
Average length of a bear market
Research from market historians suggests U.S. bear markets have lasted roughly 9–10 months on average, though individual events have ranged from weeks to years.
~2.7 years
Average length of a bull market
Bull markets have historically lasted significantly longer than bear markets, though their duration is highly variable and unpredictable in advance.
Why the Labels Are More Descriptive Than Predictive
Here's something the financial media rarely emphasizes: bull and bear market labels are applied in hindsight. To confirm a bear market, analysts look backward and measure how far prices have fallen from a prior peak. By the time the label is widely used, the decline has already happened.
This means the label itself tells you little about what happens next. Bear markets have been followed by sharp, rapid recoveries. Bull markets have ended abruptly. Neither phase has a fixed schedule. Treating these terms as forecasting tools — as in, "we're in a bear market, so prices will keep falling" — misunderstands what the terms actually describe.
Common investing misconceptions often hinge on this confusion. Investors who wait for the market to look "safe" before investing frequently miss the strongest days of a recovery, which tend to cluster near the darkest points of a downturn.
“The stock market is a device for transferring money from the impatient to the patient.”
— Warren Buffett, Chairman and CEO, Berkshire Hathaway
What These Market Phases Mean — and Don't Mean — for Everyday Investors
If you hold a diversified portfolio aligned with a long-term goal, a bear market is uncomfortable but not necessarily a crisis. Historically, U.S. equity markets have recovered from every bear market on record — though recovery timelines vary, and past performance does not guarantee future results.
The more important question is how these conditions interact with your timeline. Someone saving for a goal 25 years away experiences a bear market differently from someone who needs funds in 18 months. That's why personalized context — not the market label — should drive decisions.
It also helps to remember that not everything falls in a bear market. Different asset classes respond differently to the same economic environment. Bonds, cash, and other holdings in a portfolio may behave differently from equities, which is exactly why diversification exists as a risk-management concept.
Focus on Your Plan, Not the Label
When headlines announce a bull or bear market, the most productive question isn't 'what does the market do next?' — it's 'does my current strategy still align with my goals and risk tolerance?' Revisiting your investment plan with a qualified adviser during major market shifts is more valuable than reacting to a label. A well-structured plan accounts for the fact that both bull and bear markets are normal parts of the investing cycle.
This article is for general informational and educational purposes only and does not constitute personalized financial or investment advice. Consult a licensed financial adviser before making decisions based on your individual circumstances.