Facebook's fourth quarter profit rises 128% to $3.57 billion
World's largest social media company Facebook's fourth quarter profits rose 128% to $3.57 billion compared to a year-earlier profit of $1.56 billion. In the quarter ended December, Facebook's revenue rose 51% to $8.81 billion. This marks Facebook's seventh straight quarter where it beat the revenue estimates, buoyed by mobile video advertisement sales, including those on Instagram.