What Is a Bull Market?
A bull market is a sustained period when stock prices are rising, commonly defined as a gain of 20% or more from a recent low. Bull markets are typically associated with economic growth, rising corporate profits, and investor optimism, and historically they have tended to last longer than bear markets.
Where the Name Comes From
The term is often explained by a bull thrusting its horns upward, in contrast with a bear swiping downward.
Measuring It
The percentage change of a broad index, such as the S&P 500, from its low is typically used to identify a bull market.
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Last updated: September 29, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.