FactSet Senior Earnings Analyst John Butters provides an update of the key metrics for the first quarter earnings season for the S&P 500 as we’ve just finished the peak weeks of the earnings season. He also discusses the key drivers of the substantial improvement in the earnings growth rate for the S&P 500 during this earnings season. Which sectors and companies have been the main contributors to the rise in the earnings growth rate to 49% from 24% over the past month?