In this Market Foolery podcast segment, host Chris Hill and Motley Fool Hidden Gems‘ Abi Malin take a listener query about General Motors (NYSE: GM) and broaden it: Are stock sales from in and around the C-suite a signal that we should follow suit from our own portfolios? After all, a company’s managers know more than we do about how it’s doing, right? Well, yes. But don’t jump to conclusions: There can be a lot of reasons for liquidating some shares, and not all of them are bad news for you.