Bull Market vs Bear Market: Beginner Guide & Differences

Understand bull market vs bear market definitions, average cycle durations, historical returns, and regional investor protections across the US, UK, and EU.

A bull market is a period when stock prices rise by 20% or more from a recent low alongside widespread economic optimism, whereas a bear market occurs when a major index falls by 20% or more from its recent record high amid pervasive pessimism. Understanding the mechanics of a bull market vs bear market helps investors navigate market volatility, avoid costly timing mistakes, and build resilient portfolios across varying economic cycles.

Bull Market vs Bear Market: What Do the Technical Definitions Mean?

Financial markets do not move in a straight line. Market participants track broad market benchmarks—such as the S&P 500 in the United States, the FTSE 100 in the United Kingdom, or the STOXX Europe 600 across Europe—to determine the overarching market regime. To understand how these benchmarks operate, see our guide on how stock market indices work.

   Market Peak (Record High)
         /\
        /  \  <- Pullback: -5.0% to -9.9%
       /    \ <- Correction: -10.0% to -19.9%
      /      \
     /        \/ <- Bear Market Threshold: -20.0% or greater
    /
   /  <- Bull Market: +20.0% or greater from closing low
  /
\/ Market Trough (Closing Low)

According to technical criteria documented by Hartford Funds and Ned Davis Research, market movements are categorized into four distinct phases:

Bull Market: A sustained upward trend characterized by rising asset values, investor confidence, and positive corporate earnings momentum. It is officially confirmed when a broad index closes 20% or more above its previous trough (closing low).
Bear Market: A prolonged period of aggressive market liquidation, declining corporate valuations, and investor fear. According to Hartford Funds' volatility research, an index enters a bear market once it drops 20% or more from its most recent record high.
Correction: A shorter-term contraction where an index falls between 10.0% and 19.9% from its high. If you want to dive deeper into managing these pullbacks, read our breakdown on what is a market correction and what to do when stocks fall.
Pullback: A modest drop ranging between 5.0% and 9.9% from a peak, which routinely occurs within broader bull market trends without derailing the overall upward cycle.

How Long Do Market Cycles Last? Historical Gains and Durations Compared

Historically, equity markets spend substantially more time advancing than contracting. Data analyzing the S&P 500 from 1928 through early 2026 reveals a distinct historical asymmetry between cycles:

Average Bear Market Decline: -35.0%
Average Bull Market Gain: +112.0% to +114.0%
Average Bear Market Length: 289 days (approximately 9.6 months)
Average Bull Market Length: 988 days (approximately 2.7 years)
Frequency: Since 1928, a bear market has occurred on average once every 3.5 years. In the post-World War II era (1945–present), this cadence slowed to once every 5.1 years, representing 15 distinct bear markets over that period.

Methodological Differences Among Financial Researchers

Different market research institutions report varying figures for bull market lengths and cumulative returns based on baseline selection:

Research Provider	Average Bull Market Duration	Average Bull Market Gain	Primary Baseline Methodology
Hartford Funds / Ned Davis Research	2.7 years (988 days)	+112.0% to +114.0%	Measures from 1928 through 2026; includes the short, volatile cycles of the Great Depression era.
Opening Bell Daily / S&P Dow Jones Indices	5.5 years (median: 5.0 years)	+191.5%	Evaluates the post-1949 modern expansion era, filtering out pre-war depression volatility.
Stifel / Strategas	4.9 years	+177.6%	Tracks secular market expansions dating back to 1932.

Another common point of analytical disagreement involves threshold sensitivity. For instance, the S&P 500's downturn in 1990 measured exactly 19.9% on a closing basis. Hartford Funds treats 1990 as a correction rather than a bear market because it fell 0.1% short of the 20.0% requirement, classifying the period from 1987 to 2000 as a single 12.3-year bull market. Conversely, S&P Dow Jones Indices classifies 1990 as a bear market, splitting that run into two distinct bull expansions.

Furthermore, economic databases show 27 historical bear markets alongside 15 official recessions documented by the National Bureau of Economic Research (NBER). This demonstrates that while bear markets frequently precede economic slowdowns, false alarms occur—such as the 1966 market drop and the 1987 crash, neither of which resulted in immediate economic recessions.

Worked Example: The Mathematics of Cycle Asymmetry

To see how cycle asymmetry influences long-term portfolios, consider a portfolio starting with $10,000:

Entering an Average Bear Market: If the market suffers the historical average decline of 35.0%, the portfolio value falls by $3,500 to $6,500.
Entering an Average Bull Market: Over the subsequent bull run, the market produces a conservative average gain of +114.0%. A 114% return on the remaining $6,500 adds $7,410 in profit ($6,500 × 1.14).
Ending Portfolio Value: The portfolio rises to $13,910, overcoming the initial loss and delivering a net profit of $3,910 across the completed cycle.

Because bull markets last nearly three times longer and deliver roughly triple the percentage magnitude of the average drawdown, disciplined investors using broad index funds for beginners have historically recovered from downturns over full market cycles.

Why Trying to Time Bull and Bear Cycles Fails: The Cost of Missing the Best Days

When asset prices plummet, retail investors are often tempted to liquidate holdings into cash with the intention of re-entering at the absolute market bottom. However, research published by Hartford Funds and Morningstar highlights that the market's strongest trading days cluster tightly around its most volatile downturns:

48% of the S&P 500's top 50 trading days between 1996 and 2025 occurred during an active bear market.
28% occurred during the first 2 months of an emerging bull market, before an uptrend was officially confirmed.
In total, 76% of the best single trading days took place during market drawdowns or early recoveries.

Distribution of the S&P 500's Strongest 50 Days (1996–2025)
+---------------------------------------------------------+
| [48% Bear Market Days] | [28% Early Bull] | [24% Other] |
+---------------------------------------------------------+
 Total: 76% cluster inside or immediately after bear markets

Attempting to time market exits and entries carries severe mathematical penalties over a 30-year investment horizon:

Missing the top 10 trading days cut total cumulative portfolio returns by more than 50%.
Missing the top 30 trading days reduced cumulative returns by 84.0%.

For beginners building long-term wealth, starting early and investing steadily avoids the hazards of market timing. Review our primer on how to start investing with little money for practical entry strategies.

What Top Wall Street Strategists Say About Current Market Trends

Wall Street strategists express diverging viewpoints regarding corporate earnings durability, market breadth, and late-cycle vulnerabilities:

Dr. Edward Yardeni (President, Yardeni Research): Yardeni argues that the market is in the midst of a productive "Roaring 2020s" secular expansion. According to Yardeni Research, productivity enhancements powered by artificial intelligence and automated technologies support robust corporate earnings growth. Yardeni maintains a long-term target of 10,000 for the S&P 500 by year-end 2029 (representing approximately 8% annualized growth). In late 2026 briefings, Yardeni emphasized that market pullbacks of 10% to 15% provide buying opportunities rather than structural bear transitions, pointing to resilient forward earnings-per-share momentum.
Savita Subramanian (Head of U.S. Equity & Quantitative Strategy, Bank of America): Subramanian contends that contemporary bull trends are supported by structurally higher corporate profit margins, reduced balance sheet leverage among large-cap companies, and healthier market participation broadening beyond mega-cap tech. Subramanian notes that bull markets rarely terminate simply due to old age or rich price-to-earnings valuations; rather, endings are typically triggered by sudden monetary policy overtightening or systemic banking credit shocks.
David Kostin (Chief U.S. Equity Strategist, Goldman Sachs): Kostin highlights that while elevated index valuations mathematically compress forward 10-year annualized equity returns, elevated multiples alone do not catalyze immediate bear markets without an unanticipated macroeconomic shock. Kostin points to strong market breadth and corporate balance-sheet durability as primary defenses against severe drawdowns.
Michael Wilson (Chief U.S. Equity Strategist, Morgan Stanley): Wilson presents a cycle-conscious stance, warning that late-stage bull markets remain acutely exposed to downward corporate earnings revisions and fiscal policy drag. Wilson regularly advises investors to position portfolios in defensive, high-quality equities with strong balance sheets to dampen potential drawdown volatility.

US, UK, and Europe Differences: Protections, Account Rules, and Taxes

Navigating market cycles requires an understanding of the regulatory guardrails and tax codes in your country.

Important Regulatory Principle: Government-backed safety nets protect retail investors against broker insolvency, fraud, or custodian default. They never insure your portfolio against market losses caused by a bear market.

What Statutory Schemes Protect:
  [Broker Bankruptcy] -> COVERED (Subject to statutory caps)
  [Broker Fraud]      -> COVERED (Subject to statutory caps)
  [Bear Market Drop]  -> NOT COVERED (0% statutory reimbursement)

1. United States

Regulators: The Securities and Exchange Commission (SEC) oversees securities markets, disclosure standards, and registered advisers. The Financial Industry Regulatory Authority (FINRA) regulates registered broker-dealers.
Insolvency Compensation: The Securities Investor Protection Corporation (SIPC) protects up to $500,000 per customer per separate legal capacity (e.g., individual, joint, or IRA accounts). This protection includes a $250,000 sub-limit for uninvested cash awaiting deployment into securities. SIPC excludes commodity futures, currencies, and normal market losses.
IRS Capital Gains Tax Rules (Tax Years 2025/2026):
- Long-Term Capital Gains (held > 1 year): The 0% rate applies to taxable income up to $48,350 (Single) or $96,700 (Married Filing Jointly). The 15% rate applies from $48,351 to $533,400 (Single) or $96,701 to $600,050 (Joint). Gains above $533,400 (Single) or $600,050 (Joint) face a 20% rate. High earners are subject to an additional 3.8% Net Investment Income Tax (NIIT) above $200,000 (Single) or $250,000 (Joint).
- Short-Term Capital Gains (held ≤ 1 year): Taxed as ordinary income at rates reaching up to 37%.
- Tax-Loss Harvesting: Under IRS Topic No. 409, investors navigating a bear market can use net realized capital losses to offset ordinary income up to $3,000 per year ($1,500 if married filing separately). Excess net losses can be carried forward indefinitely to future tax years.

2. United Kingdom

Regulators: The Financial Conduct Authority (FCA) regulates financial conduct and markets, while the Prudential Regulation Authority (PRA) at the Bank of England supervises institutional safety.
Insolvency Compensation: The Financial Services Compensation Scheme (FSCS) protects eligible investments up to £85,000 per person per authorised firm against broker failure, bad advice, or fraud. Under rules taking effect 1 December 2025, the statutory banking deposit protection limit was raised to £120,000 per person per banking licence (up from £85,000). Neither covers losses caused by falling share prices.
HMRC Allowances and Taxes:
- Stocks & Shares ISA: UK investors can deposit up to £20,000 per tax year into an ISA. All capital gains and dividend income generated inside an ISA wrapper are 100% tax-free.
- Capital Gains Tax (CGT): The individual annual CGT exemption is frozen at £3,000 through 2026.
- CGT Rates on Equities: Under reforms enacted on 30 October 2024 and detailed by GOV.UK, non-property asset gains are taxed at 18% for basic-rate taxpayers (raised from 10%) and 24% for higher- and additional-rate taxpayers (raised from 20%).

3. European Union

Regulators: The European Securities and Markets Authority (ESMA) harmonizes investor protections across the union alongside National Competent Authorities (NCAs) like BaFin in Germany and the AMF in France. The European Central Bank (ECB) supervises euro-area banking stability.
Insolvency Compensation: The EU Investor Compensation Schemes Directive (Directive 97/9/EC), documented by the European Commission, mandates a statutory minimum baseline of €20,000 per investor if an EU-regulated brokerage defaults. Member states may offer higher national ceilings (for example, France's FGDR offers up to €70,000 for securities, and Spain's FOGAIN offers up to €100,000). Uninvested bank deposits are covered up to €100,000 per depositor per bank under the Deposit Guarantee Schemes Directive (DGSD).
Taxation: Capital gains taxes are set at the national level. Germany applies the Abgeltungsteuer flat withholding tax of 25% plus a 5.5% solidarity surcharge, while France levies the Prélèvement Forfaitaire Unique (PFU) flat tax of 30%. In most EU jurisdictions, realized investment losses can only offset capital gains within the same asset class and cannot reduce ordinary employment income.

Frequently Asked Questions About Bull and Bear Markets

How do I know if the stock market has entered a bear market?

A bear market is officially declared when a major benchmark index drops by 20.0% or more from its most recent record high on a closing basis. Declines between 10.0% and 19.9% are classified as market corrections, while declines of 5.0% to 9.9% are considered pullbacks.

Can an investor lose money in an index fund during a bear market?

Yes. During the average historical bear market, equity markets have declined by approximately 35.0%. Broad index funds drop in tandem with the markets they track. However, historical data shows that bull markets follow bear markets, averaging gains between 112% and 114% over roughly 2.7 years.

Does SIPC or FSCS protect my portfolio from a bear market crash?

No. The US SIPC ($500,000 limit), the UK FSCS (£85,000 investment limit), and the EU statutory scheme (€20,000 minimum floor) only protect against broker insolvency, administrative failure, or fraud. None of these statutory safety nets provide compensation for portfolio value declines resulting from falling asset prices.

How does tax-loss harvesting work during a bear market?

Tax-loss harvesting involves realizing losses on declining assets to offset realized capital gains. In the US, net capital losses can also offset up to $3,000 of ordinary income per tax year, with remaining losses carrying forward indefinitely. In the UK, gains outside of an ISA wrapper exceeding the £3,000 exempt amount are taxed at 18% or 24%, while EU member states require losses to be netted against identical asset classes under national tax frameworks.

How often do bear markets happen?

Looking at data from 1928 to early 2026, a bear market has occurred on average every 3.5 years. In the post-WWII era (1945–present), the frequency has slowed to once every 5.1 years, totaling 15 bear market periods over that time frame.

Sources

This article is for informational purposes only and is not financial advice. Markets move quickly; check live prices before making decisions.

This article is for educational purposes only and is not financial advice. Consider speaking with a qualified financial professional.