No fundamental reasons?????? Dude, the company is buying back stock, their asian assets have increased in value to $30 Billion...that's right, $30 billion, and they are stabilizing operations with innovations to their core products.
way too many positives here with Yahoo to be against the uptrend.
While i sold my position last week, this stock made me tons of money. Currently i have no position at all. I have been watching it very closely. Everything you say does not rationalize a 50% increase since November. I will remind you when hedge fund managers and other institutional investors start selling in 2 weeks. This is my own view -Good luck.