More From InvestorPlace GoPro Stock Can Be Your Hero, Baby (GPRO) The Best ETFs: A Special Report The post S&P 500: Interest Rates Are Just an Excuse appeared first on InvestorPlace . Source: Grab Media Two Fridays ago, the S&P 500 was crushed following comments from Boston Federal Reserve Bank President Eric Rosengren, who said, "We have a good probability that we're getting it by the end of the year." That rebound was short-lived though, until Thursday when modest producer price inflation and tepid retail sales for August once again precluded the odds of a September rate hike.