Yahoo and Alibaba agreed a while ago that Yahoo sells 10% of its Alibaba's holding at the time of the IPO . Unless, Yahoo negotiates to amend the prior agreement, the existing arrangement will proceed. In a difference subject, possibly, Yahoo will sell its share of Yahoo Japan to Mr. Son of SoftBank in cash or combination of cash and other assets owned by SoftBank. There is also a possibility that Alibaba, Yahoo, SoftBank including Sprint to create a company. Do your own analysis and assess risks based on facts. This is just for your information and should not be used for making any financial transactions. Good luck!