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.

AWS has not been able to match the growth of Amazon’s competitors, with Microsoft Corp.’s Azure and Alphabet Inc.’s Google Cloud seeing cloud-related revenue rise by 31% and 30%, respectively. Even so, AWS remains much bigger than any other cloud infrastructure provider, and it’s notable that those peers also missed expectations this week.