This is the real world, not Path of Exile where pseudo-random numbers rule the day. Trading is about interacting, and yes a stock can (and often should) move ba

This is the real world, not Path of Exile where pseudo-random numbers rule the day. Trading is about interacting, and yes a stock can (and often should) move based on reputation, and someone talking about it can affect that reputation. Insider trading is the line. You can't trade based on your knowledge from within the company. As others point out, hedge funds can mess with it just by applying enough "capital" to make a stock do what they want. They're in the market to, and this time they got played.