This morning, ANGI stock fell ~5% on a news story that Facebook was plotting a rival service. If you just thought about that announcement in a vacuum, ANGI's stock going down would make sense. In fact, you might even find a drop of only 5% a little puzzling. Facebook is probably the most powerful corporation in the world, and here's an article saying the company is planning to attack ANGI. At $6B market cap, ANGI certainly isn't a minnow, but its resources pale in comparison to Facebook on basically every scale (users, engineering talent, cash, etc.).