Why Amazon Stock Is Sinking Today

Amazon (AMZN -4.09%) stock is slipping in Friday's trading. The tech giant's share price was down 4.1% as of 2:30 p.m. ET. Meanwhile, the S&P 500 (^GSPC -0.84%) was down 1%, and the Nasdaq Composite (^IXIC -1.29%) was down 1.5%.Amazon published its fourth-quarter results after the market closed yesterday, posting sales and earnings for the period that came in ahead of Wall Street's targets. But despite beating expectations for Q4, the company's forward guidance came in weaker than expected -- and investors ...