Up and down, down and up - it just sort of meandered along for a while. But on Friday afternoon, Yahoo’s stock took more of an “up, up, and away” approach due to Alibaba.com’s impending IPO. As we first reported 20 days ago, Yahoo intends to buy about ten percent of Alibaba’s available shares. The full effect of this may not have been fully computed until the end of last week, however, ...