Basics
Basic3 Min Read
Bull and Bear Markets
Two animals, two thresholds, and the story the market tells about itself.
A bull throws you up with its horns; a bear swipes you down with its paw. The origin of the terms really is that simple. The thresholds, though, are numeric — and the market takes them seriously.
There is no mathematical truth in these lines — nobody claims a law of nature separates −19.4% from −20.1%. But because market participants use them as a common language, they have real effects: fund managers report in these terms, headlines are written at these levels, and some institutional risk rules trigger there.
Their Characters Differ
| Bull market | Bear market | |
|---|---|---|
| Duration | Years (historically much longer) | Months |
| Speed | Slow, gradual | Fast, violent |
| Volatility | Low | High |
| Mood | Indifference, then optimism, then euphoria | Worry, then fear, then capitulation |
| News flow | Good news cheered, bad news ignored | Bad news punished, good news distrusted |
The most durable observation: markets take the stairs up and the elevator down. Rallies build through gradual accumulation; declines happen when forced sellers — margin calls, fund outflows, risk limits — all run for the door at once.
Why Naming It Helps
Separating a correction from a bear market makes you ask what actually changed in the portfolio:
- A correction is usually a price event. Valuations stretch, some air comes out, the story doesn't change.
- A bear market is usually a story event. Earnings expectations fall, the rate regime shifts, faith in a sector's core thesis cracks.
There is no shortcut for telling them apart, but there is a good question: does whatever caused this decline change how much money companies will earn over the next three years? If the answer is no, it's probably a correction.
The Numbers
On a historical scale:
- US bear markets show up on average every few years.
- Bull markets last longer and travel further than bear markets — which is why indexes drift upward over the long run.
- 1929, 2000–2002, 2007–2009 and 2020 are the most cited bears; the first three ran for months to years, while 2020 was the fastest in history, measured in weeks.
Where You'll See It on This Site
The Market Breadth card shows how many index members are up and how many are down. When the index is rising but breadth is narrowing — a handful of stocks carrying the rally — that is often the first sign of a tiring trend, visible here before it shows in the index level.