When she took over, there were numerous articles about how Yahoo's core business had negative value (the business plus the Alibaba investment was worth less tha

When she took over, there were numerous articles about how Yahoo's core business had negative value (the business plus the Alibaba investment was worth less than the Alibaba investment). Since then she's given a lot of cash to shareholders, raised the stock price, and is selling the "negative value" core business for $4.5 billion. That's an astounding success.