Tumblr isn't doing as well as Yahoo expected
 

Yahoo had high hopes for Tumblr when it bought the blogging platform for $1.1 billion in 2013, but it hasn't lived up to its expectations. The troubled company has lowered its valuation to $760 million, down $230 million from its previous $990 millio...

http://www.engadget.com/2016/02/03/t...luation-yahoo/