One of the most useful exercises that any investor can do is turn the tables and analyze the bearish argument for a stock that they own. Today, Motley Fool analyst Brendan Byrnes, a Ford shareholder, takes a look at potential reasons to sell the stock. In the video below, Brendan points to the cyclicality of the company, the fact that there is little moat around Ford or any automaker, and that there are fewer millennials buying vehicles as three possible reasons to sell the stock.