Markets & EconomyComparison
Bull vs bear market: what is the difference?
A bull market is a broad rise of 20% or more; a bear market is a fall of 20% or more. How the labels work, what a correction is, and why recovery takes more.
Quick answer
A bull market is a period when stock prices rise broadly, generally 20% or more in a broad index. A bear market is the opposite: a decline of 20% or more. A smaller drop of at least 10% is usually called a correction. The labels describe past moves.
Key points
- Investor.gov describes a bear market as a fall of 20% or more in a broad market index over at least two months, and a bull market as a rise of 20% or more.
- A drop of at least 10% that then reverses is generally called a correction.
- Losses and gains are not symmetric: after a 20% fall, the index needs a 25% gain to get back to where it was.
- The labels are applied after the fact, so they cannot tell you when a market will turn.
What do bull and bear market mean?#
Bull and bear are market slang for the direction of a big, lasting move. The SEC's investor education site describes a bull market as a time when stock prices are rising and market sentiment is optimistic, and a bear market as a time when stock prices are declining and sentiment is pessimistic[1][2]. Sentiment just means the general mood of investors.
The terms usually refer to a broad market index — a single number that tracks a large basket of stocks. Investor.gov explains that a market index tracks the performance of a specific basket of stocks representing a market or sector[3]. In the U.S., the S&P 500 is a common yardstick; its publisher says it includes 500 leading companies and covers approximately 80% of available market capitalization[4]. See stock market indexes explained for how these are built.
How do bull and bear markets compare side by side?#
| Feature | Bull market | Bear market | Correction |
|---|---|---|---|
| Direction | Prices rising broadly | Prices falling broadly | Prices reverse course, then resume the earlier trend |
| Common threshold | Rise of 20% or more | Fall of 20% or more | Move of at least 10% |
| Time condition (Investor.gov) | At least a two-month period | At least a two-month period | None stated |
| Investor mood (Investor.gov) | Optimistic | Pessimistic | Not described |
| Measured on | A broad market index | A broad market index | Stocks, bonds, commodities or indices |
Definitions from Investor.gov[1][2] and FINRA[5]. These are conventions, not legal rules, and sources word them slightly differently.
FINRA's glossary of stressed-market terms gives the same 20 percent threshold for a bear market in a broad index, and adds that the term can apply to a stock or bond index or a commodity's price that falls and keeps falling[5]. It defines a correction as a reversal of at least 10 percent before the previous upward or downward trend resumes[5].
How do you tell when the 20% line has been crossed?#
The measurement always starts from a reference point. For a bear market, that is the most recent high, often called the peak. For a bull market, it is the most recent low, the trough. Divide the change by the starting level, exactly as with any percent change.
Worked example
Worked example: an index falls from 5,000
Suppose a broad index peaks at 5,000 (an illustrative level, not a real index value). A fall to 4,500 is a 10% decline — correction territory. A fall to 4,000 is a 20% decline — the usual bear-market line. If it then climbs 20% from 4,000, it reaches 4,800, which would meet the bull-market threshold measured from the low even though it is still below the old peak.
| Index level | Change from the 5,000 peak | Common label |
|---|---|---|
| 4,500 after the fall | −10% | Correction |
| 4,000 after the fall | −20% | Bear market |
| 4,800 after rising 20% from 4,000 | −4% | Bull market measured from the low |
Figures computed in code from the stated inputs; rounded to the nearest cent or tenth.
The example shows why the two labels can overlap in confusing ways. A market can be in a new bull market measured from its low while still sitting below its previous high. A headline may not say which reference point it used, so it is worth checking.
Why does a fall need a bigger gain to recover?#
Percentages are measured from different starting points on the way down and on the way up. A 20% fall from 5,000 leaves 4,000. Getting back to 5,000 requires a gain of 1,000 on a base of 4,000 — that is 25%. The deeper the fall, the larger the gap.
Gain needed to get back to the old peak
The same arithmetic applies to your own account. A $10,000 portfolio that falls 25% is worth $7,500; a 25% gain from there brings it only to $9,375. Investor.gov puts it plainly: stock prices move down as well as up, and you can lose money[6]. Our note on volatility and drawdowns goes deeper into measuring falls from a peak.
Do bear markets mean a recession?#
Not necessarily. A bear market is about prices in a market index; a recession is about the whole economy. The committee that dates U.S. recessions looks at income, employment, spending, sales and industrial production[7] — stock prices are not on its list. Our note on recessions and markets explains how recessions are dated.
Falls are a normal part of owning stocks. The SEC's investor site notes that large company stocks as a group have lost money on average about one out of every three years[8].
Market-wide circuit breakers (U.S. stock market)
Very fast single-day falls have separate rules in the U.S. A Level 1 or Level 2 decline before 3:25 p.m. halts market-wide trading for 15 minutes, and a Level 3 decline halts trading for the rest of the day[9]. These are about one day's moves, not about bull or bear labels, and rules differ by country.
How should a beginner act in either kind of market?#
Start from your goals, not the label
FINRA notes that solid financial goals tied to a sound long-term plan typically survive short-term market ups and downs.
Check your concentration
Holding a large share of your money in one investment or market segment exposes you to concentration risk, in FINRA's words.
Avoid impulsive moves
FINRA's advice is to avoid impulsive decisions when markets become volatile or economic conditions change.
Watch for scams
Fraudsters operate in all market conditions, so treat any product sold as protection from a bear market with extra care.
Those four steps come from FINRA's tips for turbulent markets[10]. They work the same way in a rising market, where the temptation is to chase what has gone up. A plan built around diversification and your own risk tolerance and time horizon does not need to know which animal is in charge.
What mistakes do beginners make?#
Thinking the label predicts what comes next
A market is called bear or bull after a 20% move has already happened. The label says nothing reliable about the next month.
Forgetting the recovery math
A 20% loss needs a 25% gain to break even, and a 50% loss needs 100%. Compare losses and gains on the same base before judging a recovery.
Mixing up the reference point
"Up 20%" from the low and "down 20%" from the high can both be true at once. Check which starting level a headline uses.
Selling everything when a bear market is announced
By the time the label appears, the fall has already happened. Decisions made in a panic can be hard to undo at a good price.
What else do beginners ask?#
Who decides when a bear market starts?
What is the difference between a correction and a bear market?
Size. FINRA describes a correction as a reversal of at least 10 percent, and a bear market as a decline of 20 percent or more in a broad index[5].
Does the 20% rule apply to a single stock?
How is a bull market measured?
From the most recent low. Investor.gov describes a bull market as a rise of 20% or more in a broad market index over at least a two-month period[1].
What is the bottom line?#
Bull and bear markets are shorthand for large, broad moves in a market index — about 20% up or down — with corrections covering smaller drops of at least 10%. The labels are useful for reading the news, but they arrive after the move, and they hide an important piece of arithmetic: falls take a bigger percentage gain to undo. A diversified plan you can stick with matters more than knowing which label applies today.
Sources
Numbers in brackets in the text point here. Grade A = primary source (regulator, statistics agency, law or official document).
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