GET MONEY, it does not take big money to drive a stock price down.  Several investors get together and agree to sell a small number of shares each in rapid succession, the orders are processed, and the share price drops.  No large sum of money is lost, but the upside is huge.  The same thing can and does happen in reverse when they want the price up.  There is nothing that can be proved, unless someone admits they were involved in collusion, and they are not likely to admit such a thing.  In fact, these people become very vocal if one brings the subject up.  When I told Integracer02 about Daisy Chain trading, and he then posted about this on IFlub, Plutus immediately deleted his post.  I later reinstated that post, and that is why you see it there today.