S&P 500 drops 2%. Here’s what should happen next

U.S. stocks plunged Friday on concerns the Fed could raise interest rates as soon as this month. So what will happen Monday?

Based on a study from Kensho, a quantitative tool that takes into account historical trading patterns, there have been 21 instances since 2010 when the fell by at least 2 percent in a single day. Here's what happened during the next trading day ...