Notable companies reporting after the bell include American International Group (AIG), CBS (CBS), Fluor (FLR), Microchip Technology (MCHP), PerkinElmer (PKI), Pitney Bowes (PBI), Southwestern Energy (SWN) and Sunoco (SUN).
Yahoo Inc's board has approved a deal to buy blogging and social networking site Tumblr for $1.1 billion in cash, …