Shares of Datadog Inc. initially surged in after-hours trading Thursday after Amazon.com Inc.’s earnings showed slightly better-than-expected sales for its AWS cloud-computing unit, but they turned around after Amazon disclosed a further cloud slowdown on its earnings call. Datadog’s stock was recently down 4% in Thursday’s after-hours trading. It gained 1.4% in Thursday’s regular session and rocketed 10.5% in Wednesday trading after Microsoft Corp. offered upbeat commentary about its Azure cloud-computing business that an analyst said was a positive signal for Datadog. The company’s “growth prospects are linked to…
