Umm, little kid, it has to do with if yahoo accepts the deal or not.
Yahoo's board rejected the deal. They believe Yahoo is worth more than Microsoft's bid.
A hostile takeover is when one company tries to take over the other against it's wishes. It has nothing to do with search engine market share..
Microsoft is probably going to continue attempting to purchase Yahoo against Yahoo's wishes. They can do this by offering to buy shares from individual investors until they have enough to take control. That is a hostile takeover.







