With Pink companies, there is often the hint or PR that a buy out is coming at a much higher price; the buyout that happens post the PR is the company and Pr machine selling into the pop. I've yet to see a real buy out of a pinkie.
Maybe Hemi will be the exception; to my knowledge, the buyout rumor for Hemi has not been PR'd, only a little secret passed from CEO to shareholders. Why? that is the million dollar question. imho