Welcome back Yahoo. This is definitely a reflection of the confidence investors have in their new direction. Yahoo leadership has committed itself to innovation and to broadening its appeal to a wider audience. These moves (changing mail interface, homepage interface, acquiring tech startups, acquiring Tumblr, selling or discontinuing less successful ventures) have set the company up in a position to move forward rather than tread water.

http://www.pcworld.com/article/2039444/yahoo-returns-to-list-of-most-valuable-brands.html