Let's cut to the chase. A bear market—defined as a decline of 20% or more from a recent peak in a major index like the S&P 500—isn't an "if" for investors, it's a "when." If you're looking at a list of US bear markets, you're probably trying to do two things: understand the past to gauge what's normal, and find a practical plan for the next one. You're in the right place. This isn't just a dry chronology. We'll walk through every significant bear market since the Great Depression, pull out the common threads (and the crucial differences), and most importantly, translate that history into strategies you can actually use. Forget panic. Let's talk about preparation.

Your Quick Navigation Guide

What Exactly Is a Bear Market?

We throw the term around, but let's pin it down. By the book, a bear market is a peak-to-trough decline of 20% or more in a broad market index, most commonly the S&P 500. It's different from a "correction," which is a drop of 10-20%. The 20% threshold isn't magic, but it's a widely accepted marker of severe, broad-based pessimism.

Here's a nuance most beginners miss: the official start and end dates you see on lists (like the one from Yahoo Finance or S&P Dow Jones Indices) are determined retrospectively. You only know you're in a bear market for sure after you're already deep in it. The end is declared only after the index closes 20% above its trough. This means real-time investing during a bear market is always an exercise in uncertainty—you're navigating by feel and principle, not by a clear signal.

The Complete Historical Bear Market List

This table isn't just data. Look at the "Primary Catalyst" column. That's where the story is. You'll see a pattern: external shocks, policy mistakes, and valuation excesses.

Bear Market Period Duration (Months) S&P 500 Decline Primary Catalyst & Context
Great Depression 33 -86% Post-1929 crash, bank failures, protectionist trade policy (Smoot-Hawley Tariff). A policy-driven disaster.
1937-38 Recession 13 -54% Premature fiscal and monetary tightening choked off recovery. A classic policy error.
1946-47 Post-War 14 -28% Transition from wartime economy, inflation fears. A necessary digestion period.
1961-62 (Flash Crash) 6 -28% The "Kennedy Slide," driven by the US-Soviet tensions and overvalued growth stocks.
1966 Bear Market 8 -22% Vietnam War spending, inflation concerns, and a credit crunch.
1968-70 18 -36% "Go-Go" years bubble burst, recession, Nixon's inflationary policies.
1973-74 Stagflation 21 -48% Oil embargo, wage-price controls, high inflation. A brutal double-whammy for stocks and bonds.
1980-82 20 -27% Paul Volcker's aggressive rate hikes to kill inflation, causing a deep recession.
1987 Crash 3 -34% Black Monday (Oct 19). Largely technical (portfolio insurance), not economic. The fastest and sharpest.
2000-2002 Dot-Com 31 -49% Collapse of overvalued tech/internet stocks, 9/11 attacks. A valuation reckoning.
2007-2009 GFC 17 -57% Global Financial Crisis. Housing bubble, Lehman collapse, systemic banking failure.
2020 COVID-19 1 -34% Global pandemic lockdowns. Ultrashort but terrifying, followed by massive stimulus.
2022 Bear Market ~9 -25% 40-year high inflation, aggressive Fed rate hikes, Russia-Ukraine war.

See the 1987 crash? Lasted only 3 months. The Dot-Com bust? Grinded on for over 2.5 years. The cause dictates the character. A sudden shock (COVID, '87) tends to be V-shaped—sharp down, sharp up. A fundamental unwind of excess (2000, 2007) is a long, painful U or L shape.

My personal hardest lesson was 2000-2002. I held onto a few "story" tech stocks all the way down, thinking they'd bounce back first. They didn't. They went bankrupt. The takeaway? In a bubble-bursting bear market, the most speculative names get wiped out permanently. The S&P 500 eventually recovered, but my individual portfolio didn't.

What All Bear Markets Have in Common

Looking at that list, three patterns emerge that every investor should tattoo on their brain.

1. They Are Inevitable, But Not Predictable

Since World War II, the US has experienced a dozen bear markets—about one every 6-7 years on average. They're a feature of the system, not a bug. The big mistake is trying to predict the exact start date. You'll fail. The 2020 bear market came from a virus nobody saw coming. The 2022 bear market was triggered by inflation most thought was "transitory." Focus on preparation, not prediction.

2. They Are Always Different... And Feel the Same

Each has a unique catalyst (oil, inflation, tech, houses, a virus). But the emotional arc is identical: denial, fear, panic, capitulation, and finally, despondency right near the bottom. The headlines always scream "This Time Is Different." In terms of the economic details, it often is. In terms of market psychology, it never is.

3. They End

This is the most important fact on the list. Every single one has ended. The average duration is about 14 months, with an average decline of around 35%. But averages lie. Some are short and brutal, some are long and draining. The key is that the market has always, eventually, made a new high. The recovery after the 2007-09 bear market took years, but it happened. The recovery after 2020 took months.

Strategy beats timing every time. Here’s what a messy history teaches us.

Your Battle Plan Before the Storm:

  • Know Your True Risk Tolerance: Not the one you feel in a bull market. How did you sleep in March 2020? If you sold in panic, your asset allocation was too aggressive. Dial it back now.
  • Build Your Cash Reserve: Not for market timing, but for life. Having 6-12 months of expenses in cash means you never have to sell stocks at a 30% loss to pay a bill. This is your financial shock absorber.
  • Automate Your Investments: Set up automatic contributions to your index funds. This forces you to buy more shares when prices are low. It's the single most powerful behavioral hack.

Your Survival Guide During the Drop:

  • Turn Off the Noise: Stop checking your portfolio daily. The minute-by-minute commentary is designed to trigger emotion. Unplug.
  • Revisit Your Plan, Not Your Portfolio: If your long-term goals (retirement in 20 years) haven't changed, why should your strategy? Changing your plan mid-crisis is usually a costly error.
  • Tax-Loss Harvest: This is the one proactive move to consider. Sell a losing position to realize a capital loss (which can offset taxes), and immediately buy a similar but not identical asset (e.g., sell an S&P 500 fund, buy a Total Market fund). It turns a paper loss into a tax advantage.

The Subtle Error Most People Make: They focus all their energy on "when to get back in." This assumes you can time the bottom. You can't. A better question is: "How do I ensure I'm still investing consistently on the way down and the way up?" That's what dollar-cost averaging via automation does.

Your Bear Market Questions Answered

Should I move all my money to cash at the first sign of a bear market?
Almost certainly not. The two most costly mistakes in investing are getting out at the wrong time and failing to get back in at the right time. You have to be right twice. Missing just a handful of the market's best days—which often cluster violently right after the worst days—can devastate long-term returns. A study by J.P. Morgan Asset Management showed that missing the 10 best days in the market from 2003 to 2022 would have cut your annual return by more than half. Staying invested through the discomfort is usually less risky than trying to jump in and out.
How can I tell if we're in a regular correction or the start of a major bear market?
You can't, not in real time. That's the trap. In early 2008, after a 10% drop, many thought it was just a correction. It wasn't. In 2011, the S&P 500 fell 19.4%—agonizingly close to bear market territory—before rocketing higher. The distinction is only clear in hindsight. Instead of trying to diagnose the market, diagnose your own portfolio. Is it built to withstand a 20%, 30%, or even 40% drop without forcing you to make a panic sell? If the answer is yes, the label doesn't matter.
What's the average length of a bear market? Is the current one longer or shorter than usual?
Since 1929, the average bear market lasts about 14 months. But that's skewed by the Depression-era ones. Post-World War II, the average is closer to 11-12 months. The 2022 bear market, which lasted about 9 months from peak to trough (Jan-Oct 2022), was slightly shorter than the modern average. The longer, grinding bear markets (1973-74, 2000-2002) are typically associated with deep structural economic problems, not just cyclical downturns or policy shifts. Duration is less important than cause.
Which sectors or assets typically hold up best during a downturn?
Defensive sectors like consumer staples, utilities, and healthcare tend to be more resilient because people still buy food, pay electricity bills, and need medicine in a recession. However, this isn't a guarantee—in 2022, with rising rates, even utilities got hit. Bonds are supposed to be a hedge, but they failed spectacularly in 2022 due to inflation. The only reliable hedge is a long-term, diversified portfolio and a cash buffer for expenses. Chasing the "best" sector in advance is often a losing game.

Looking back at the full list of US bear markets gives you perspective. They are painful, universal, and temporary. The investors who succeed aren't the ones who avoid the pain—that's impossible. They're the ones whose plans are built to endure it, who keep investing when it feels worst, and who understand that the recovery, though unpredictable in its timing, is the most reliable feature of market history. Use this history not as a fear index, but as a preparation manual.