Facebook finished 2015 with a strong fourth quarter, with sales rising 52 percent from a year ago to $5.84 billion, and profit more than doubling from $701 million to $1.56 billion. The upswing beat Wall Street’s predictions for Q4 of $1.2 billion in profit on $5.37 billion in revenue. Investors rewarded the company by pushing its stock up more than 12 percent in after-hours trading. Responsible for the stupendous upward trend is mobile advertising, which soared to 80 percent of the company’s total ad business in Q4 2015. Continue reading Facebook Profits Skyrocket, Beating Wall Street Expectations