Oppenheimer's Jason Helfstein cuts his 2013/2014 estimates for Facebook (FB -0.5%), citing...

|About: Facebook (FB)|By:, SA News Editor

Oppenheimer's Jason Helfstein cuts his 2013/2014 estimates for Facebook (FB -0.5%), citing concerns about seasonality and mobile ads. Helfstein estimates mobile made up 60% of Facebook use in February, up from 34% in March '12. His cuts come as IDC strikes a more positive tone on the subject. "Facebook’s meteoric rise in mobile display threatens Google’s (GOOG) dominance in that segment, on top of the fact that mobile search growth is slowing considerably ... Where in past years, ad networks ... received most of the spending on mobile display ads, now publishers control the segment."