Sales bump: Amazon soared 10 percent Friday to $659.69 after reporting late Thursday a big jump in revenue that blew past analysts' expectations, demonstrating the growing market power of its core retail business and new cloud services division.

Med deal: Cancer drugmaker Medivation's shares rose 9 percent to $56.51 Thursday after French drugmaker Sanofi went public with an offer to buy the company for $9.3 billion. Medivation shares closed the week at $57.82. U.S.-traded Sanofi stock slipped 2 percent to $43.03 Thursday, and closed the week at $41.10.

Expanding waistline: Hanesbrands shares rose 8 percent to $30.14 Thursday after the maker of underwear, T-shirts and socks said it will buy the biggest maker of underwear in Australia, Pacific Brands Ltd. Hanesbrands stock closed the week at $29.03.

#Yikes: Twitter dropped 16 percent, to $14.94 Wednesday after the company's first-quarter revenue fell short of expectations and its guidance disappointed investors. Shares closed the week at $14.62.

Dream deal: DreamWorks Animation rocketed 18 percent, to $32 Wednesday on reports the company behind the "Shrek" and "Kung Fu Panda" franchises might be acquired by Comcast. DreamWorks closed the week at $39.92.

Copy that: Xerox shares dropped 12 percent to $9.78 Monday as the company cut its profit outlook after its first-quarter profit dropped 85 percent. The company's costs went up as it gets ready to split into two businesses, and its revenue fell. Shares closed the week at $9.60.

news services