The S&P 500 rallied on Tuesday to finish higher and secure its biggest quarterly percentage gain in more than two decades as improving economic data bolstered investor beliefs that a stimulus-backed rebound for the U.S. economy was on the horizon. Coming off a drop of 20% in the first quarter, the biggest quarterly decline since the financial crisis in the fourth quarter of 2008, the S&P rallied more than 19% to notch its biggest quarterly gain since 1998, at the height of the tech boom. The gains have been fueled by unprecedented levels of fiscal and monetary stimulus and the easing of restrictions. But the S&P 500 is still down about 4% on the year, and gains in June stood just over 1% due to the flare-up in virus cases that has threatened to delay reopenings and derail a tentative economic recovery. Federal Reserve Chairman […]