If Insiders Know What's Happening, What Does It Mean When They Sell?

Because executives in public companies have access to data that the rest of the public does not have, any time they buy or sell their own stock, they are required to file notice of those transactions with the SEC. This lets the rest of us know what the insiders are doing, and - by extension - be able to make informed guesses about what those transactions mean.

Multiple news sources report that insider selling - as reported to the SEC - outnumbers insider buying by a 30:1 margin.

Here, Trim Tabs CEO Charles Biderman discusses what it means for the retail stock purchaser. (Trim Tabs actually tracks this data for investors.)

You DO have Stop-Loss orders in place now, don't you?