(Bloomberg) — Amazon.com Inc. (AMZN) shares have been dogged for most of the year by concerns the company’s cloud-computing business was losing ground to rivals. Those fears have been put to rest for the time being. With earnings results last week showing the fastest quarterly growth for Amazon Web Services since 2022 followed by a $38 billion cloud deal with OpenAI, there’s mounting evidence that momentum is back for the critical unit. The one-two punch has delivered a 12% gain in four trading days, addi ...