In this video, Motley Fool analyst Blake Bos talks about the sudden dip in Green Mountain Coffee Roasters (GMCR.DL) shares today, down 6%, with no news to report. He tells us how many investors have been holding short positions on this stock this year, which can cause these brief downticks. However, this type of stock volatility for no real discernible reason is not something for investors to worry about. If nothing has happened to change your investing thesis on the company, there's no reason to change your position.