Bull Markets: When Optimism Drives Sustained Price Increases

A bull market is a sustained period of rising asset prices, conventionally defined as a 20% gain from a recent trough. The term applies most commonly to equities but extends to bonds, commodities, real estate, and other asset classes. ## Characteristics - Broad-based price appreciation across sectors - High investor confidence and risk appetite - Economic expansion or expectation thereof - Increasing trading volumes - Media optimism and rising retail participation ## Duration Bull markets are typically longer than Bear Markets: Definition, Historical Frequency, and Recovery Patterns. Since 1942, the average US bull market has lasted approximately 4.3 years with an average gain of ~149%. The longest — March 2009 to February 2020 — ran nearly 11 years. ## Psychology Bull markets feed on themselves: rising prices create paper wealth, boosting consumer spending and corporate earnings, which further justify higher prices. This positive feedback loop is sustainable while fundamentals support it but can extend into speculative territory where prices detach from underlying value. The transition from bull to bear is rarely obvious in real time. Most investors don't recognize the top until well after it has passed.