You'd think this would affect the stock price, but currently YHOO only trading down 8 cents (-0.18%). I honestly see this all the time. What sounds like really horrible news for a company, does not affect the price. Howerver, some random analyst or reporter who works at the Mercury Star Sun Inquirer writes a negative article or downgrade and the stock tanks. Doesn't make much sense.
https://www.bloomberg.com/view/articles/2015-12-02/yahoo-is-...
"Yahoo's actual core business of being Yahoo (and Tumblr and whatever) is worth negative $13 billion"
"Even after deducting 38 percent from the value of [the Alibaba shares] to account for taxes, you get a value for Yahoo's actual business of just $1.7 billion"