. >> for more on alibaba, betty liu spoke with alibaba executive vice chairman joe tsai.ber one, mobile. >> this shift to mobile is obvious he -- there are two sides to the coin. on the monetization rate, it has been trending up over the last few quarters. the one thing to remember about mobile is we have now 265 million monthly active users that are coming to our mobile apps to buy things. that is a very good results especially in light of the net ads. we believe, as long as you continue to attract users on mobile to buy things, to engage on your platform, at some point, monetization will follow. one thing i would like everyone to remember, in the fourth quarter, alibaba generated $1 billion u.s. in mobile revenue. this is a substantial number. we broke that $1 billion mark. >> joe, on other developments speaking about mobile, yahoo! saw some good mobile ad revenue growth in their quarter just a day ago. marissa mayer has now spun out her alibaba shares into spinco. would you have any interest in buying all or part of spinco? >> we don't anticipate buying entering into a

. >> alibaba executive joe tsai.mond washington to the sidelines of every nfl game including this weekends super bowl we are going to head out , onto the field next to show how microsoft surface is changing the way coaches play. next. ♪ >> you are watching. "the best of bloomberg west" where we focus on innovation, technology, and the future of business. i am cory johnson. it's super bowl weekend. patriots back as the defending champions -- back against the defending champions the seattle seahawks. i had a chance to talk with russell wilson about how the microsoft surface tablet is helping change the way the team draws plays. every time russell wilson does this, the nfl is watching and so is microsoft. this season, the nfl introduced digital, the custom microsoft surface tablet, on the sidelines. way up here in the catacombs are where cameras capture the images but the cameras are controlled by the nfl. the league takes the image. the team approves the image and 70, sends it to the server, and then shows up on the si

. >> joe tsai was on with us. he said, we put guys in jail if we find any fraud on her websites.estion about the tie up with yahoo! after they spun off their alibaba shares. i to play with he said about spin co. >> we do not into sedate entering into -- we do not anticipate entering into a relationship with yahoo! or spin,. this is something that is the right of yahoo! to do. the board has decided to do the spinoff. from our perspective, operating the business day today today we have a 15% shareholder in us yahoo!. after the spinoff, we will have another 15% shareholder, the spin co. it does not change anything. >> is that going to put to rest any of the speculation that we could see something happened on the line? >> here is what he is saying. we, alibaba are not going to actively help yahoo! is a taxes or spin off the stake in us. that said, as matt levine pointed out last week in an article on the subject, now that we have spin co which is purely alibaba shares down the road it would make sense for alibaba to acquire spin co using their own shares and change up their capital s