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.

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.

By Greg Bensinger, Deborah Mary Sophia (Reuters) -Amazon.com investors drove shares down sharply on Thursday due to weakness in the retailer's cloud computing unit and lower-than-expected forecasts for first-quarter revenue and profit.