Now that we have a value of $32 billion for all of Alibaba Group (see previous post), we might as well look at the sum-of-the-parts or stub valuation of Softbank Corp. Softbank Corp. owns 32.6% of the Alibaba Group, and that’s worth $10.4 billion or 790 billion yen. Let’s look at all Softbank’s holdings. Softbank’s…