Zoom any index chart on our tracker out to a year or more and the daily noise resolves into something larger: long climbs interrupted by punishing declines. Markets have moved in these alternating regimes for as long as records exist, and the vocabulary for them — bulls and bears — hides some precise definitions and useful history.
The definitions
Convention sets the thresholds at twenty percent. A bear market is a fall of twenty percent or more from a recent peak; a bull market is a rise of twenty percent or more from a low. A drop of ten to twenty percent is merely a "correction." The lines are arbitrary but universally used, which makes them useful — when headlines declare a bear market, that specific threshold has been crossed.
The asymmetry that matters
History's most important lesson about these cycles is their asymmetry. Bull markets have typically run for years and delivered gains of a hundred percent or more; bear markets have typically been far shorter — often around a year — with average losses in the thirty-to-forty percent range. Markets climb stairs and take elevators down: the falls are faster and more frightening, but the climbs have historically been longer and larger. This asymmetry is the entire statistical case for long-term investing.
The psychology of each phase
Cycles are driven by fundamentals — profits, interest rates, recessions — but amplified by crowd psychology. Bull markets mature from disbelief to confidence to euphoria, where risk feels abolished and valuations detach from sense. Bear markets descend from denial through fear to capitulation, the point of maximum pessimism where selling exhausts itself. The uncomfortable regularity: the crowd feels most confident at tops and most certain of doom near bottoms.
The bear market rally trap
Bears do not fall in straight lines. They are punctuated by sharp, convincing rallies — some of history's biggest single-day gains occurred inside bear markets — that lure buyers before the decline resumes. Distinguishing a bear rally from a genuine new bull is close to impossible in real time, which is why "the bottom is only visible in hindsight" is a cliché that happens to be true.
Using the frame on our tracker
Pull up any major index on the one-year view and place it in the vocabulary: how far below its peak is it? Correction territory, bear territory, or new highs? That single orientation — knowing which regime you are likely in, and how such regimes have historically resolved — does more for judgment than any hour of daily commentary.