A bull market occurs with an increase of 20% or more in a broad market index—such as the S&P 500 or the Dow Jones Industrial Average —over two months or more. Investor confidence is high .

Bull Market of 1957-1961: The Cold War Length: 50 months S&P 500 Return: 86.4% Maximum Drawdown: -13.9% The bull market of the late 1950s and early 1960s was characterized by the ramping up of the ...