Tiger Capital takes a 2.5% new interest in Yahoo!! Holy cow 25 million shares!!
You just answered your question. They bought YHOO shares by the end of September when the shares were depressed aand were in $15 range and not today at $18. Three months later when the shares are $15 (let's just assume), you will hear that Tiger capital has sold his shares in November and then you will start to follow Tiger capital and sell your shares at $15 :).
None of these managers will sell until Yahoo is at least $23-$25. There is now a $17 put under the stock for all of its cash on hand and its holdings in Alibaba and Yahoo Japan. Also, it is said that Alibaba is really worth $100 billion. That would put yahoo's stake worth around $24 billion. Again I will state this! Yahoo is worth twice what it is trading at. Why do you think a fund like Tiger Capital invested 5% of its total worth into the company? These guys do more deep research than all of us on this board combined times 100!