I work for a publicly traded company and I have some visibility into what’s happening with our products and business. Then I read the Y! Finance page about our stock and it’s all weird math trends analyses and absolutely zero about our company, its fundamentals, and the future of our business. Stock trading is just a bunch of assholes trying to sift the sea of numbers to divine a magic formula. The irony is that their own behavior drives the price changes, so they are feeding straight into the data they are trying to read and act on. What a circle jerk.
Yes, and good news about the company can drive the stock price down, if enough people decide that that’s probably a high point for the near future and a good time to sell and take profits.