Apple and these other stocks have contributed the most to this historic bull market
August 20, 2018 at 15:35 PM EDT
Apple's stock alone accounts for 4.1 percent of the S&P 500's gain dating back to March 9, 2009, according to data from S&P Dow Jones Indices' Howard Silverblatt. Microsoft, meanwhile, accounts for 2.4 percent of the S&P 500's gain.