chris butler serving eight years. >> the day started at yahoo with a big deal. a $1.1 billion deal to acquire tumblr and ended with a major product upgrade. it's all about a youth movement. >> yahoo hoping 6-year-old tumble. r can show an old dog new trips. why the deal makes sense. yahoo provided the video. >> we're very strong in sports, news, finance and photos they're very strong in fashion and architecture, food, travel. a lot of the verticals we aren't. so when you first look at how the company was work together there is just a lot of terrific opportunities there. >> however, analyst rob enerly is worried remembering when then ceo tried to reinvigorate hp by acquiring compax. -. >> so he's slamming in a young company into an older firm. it's going to be a distraction well. swau compaq. this is going to be the same problem here, yahoo doesn't have resources hp did. this is cheaper it's still risky. >> tumblr users are young and yahoo's image of that of a stojy old company. >> yahoo is old for me, we grew up hearing yahoo everywhere. i think google is taking