eec78827_ad_investment__or_vice_versa____The_Pricing_Game
[0] Information effect [The Value Game] Only information that alter cash flows, growth and risk in a material way can affect value. [The Pricing Game] 
Incremental information (news, stories, rumors) that shifts the mood will move the price, even if it has no real consequences for long term value.
Musings on Markets: Twitter IPO: Why a good trade be a bad investment (or vice versa)?
The Pricing Game