Google's average ad rates just keep falling, but Wall Street no longer seems to care

 Google is making less money every time you click on one of the ads it shows. This metric is called cost-per-click (CPC), and as this chart from Statista shows, it's been dropping on an annualized basis ever since the last quarter of 2011.

http://uk.businessinsider.com/google-cpc-change-over-time-2015-10