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.

Amazon.com investors drove shares down sharply on Thursday (Feb 6) due to weakness in the retailer's cloud computing unit and lower-than-expected forecasts for first-quarter revenue and profit. Amazon's shares fell as much as 5 per cent in extended trade after the fourth-quarter earnings report,

Amazon.com topped Wall Street estimates for quarterly revenue on Thursday, as strong sales over the holiday shopping season boosted its retail business, helping offset weakness in the cloud computing unit.