Yahoo has lost search market share for nine consecutive months in the U.S., according to comScore.
May 2012 saw Yahoo drop another 0.1% in May to 13.4%. That’s down almost 3 full percentage points from last August. Most of those losses have been Google’s gains — its market share is up about 2 percentage points since August 2011, while Microsoft’s Bing has gained 0.7% since that time.
In a research note, analyst Ben Schacter from Macquarie says that he sees “no structural bottom” to Yahoo’s decline.
These stats don’t include mobile browsing, where Google is probably even more dominant. Google is also stronger outside the U.S., with the notable exception of China.
Here’s a chart showing the stats since last August. Click the magnifying glass in the upper-right corner for a bigger version.