Amazon shares fell 4% in Frankfurt on Friday a day after the retailer's results showed weakness in its cloud computing unit and it forecast and lower-than-expected first-quarter revenue and profit.

Wall Street’s expectations on fourth-quarter earnings and revenue today, but sales in its all-important cloud computing business came up short, and guidance for the current quarter was light. As a result,

Amazon shares slid after the online-retail and cloud-services giant offered a first-quarter outlook that came up short of Wall Street’s expectations while forecasting bumpy trends in its cloud business.