At the starting month of the year 2015 Yahoo has experienced an appreciable share growth and query volume. ComScore search report for January has constituted the fact.
Bing has experienced hardly any changes from December to January holding a stable share. Whereas Google has practiced its second consecutive fall in query volume.
Microsoft sites have found a growth of 1% whereas Yahoo has gained around 11%. The overall negative impact experienced by AOL, ASK and Google. According to US mobile search Google has a share of 84.2%, whereas Yahoo has found only 9.6%. Here is the graph of the three majors have a look.