The Security and Exchange commission is looking into social media posts for signs of potential fraud amid the last few weeks of volatile trading on Wall Street. The U.S. securities regulator is investigating whether the posts were part of a manipulative effort to drive up share prices for companies like gamestop and amc. A group of Reddit users caused short-term surges in those shares by encouraging investors to buy them in bulk. Some daytraders cashed in big. But hedge fund investors lost a reported 19-billion dollars. We break down what this is all about and what it may mean to you.