Bull Market

A sustained period of rising stock prices, generally defined as a gain of 20% or more from a recent low, typically accompanied by economic expansion and investor optimism. The longest bull market in U.S. history ran from March 2009 to February 2020, lasting nearly 11 years and delivering a gain of more than 400% in the S&P 500. Bull markets climb a "wall of worry" -- they tend to advance despite constant predictions of their demise.