Internet firms' earnings announcements trigger unjustified stock price changes, study finds.
The article discusses how internet companies' stock prices behave strangely around their earnings announcements. The authors think this is due to price pressure. They point out that earnings announcements don't usually cause such big changes in stock demand. They also mention some issues with testing their price pressure idea. Lastly, they talk about the challenges of making money by trading based on the stock return patterns they found.