Amazon Cloud Needs to Deliver After Microsoft, Alphabet Misses

Amazon.com Inc. shares have largely climbed on the back of two trends: strength in its cloud business and a focus on costs. Now both could be in question.

Disappointing results from major cloud-computing companies Alphabet Inc. and Microsoft Corp. suggest reasons to be cautious about Amazon Web Services, the biggest player in the space — and a central plank in Wall Street’s nearly unanimously positive view on the stock. At the same time, a trend of growing capital expenditures as firms invest heavily in artificial intelligence could, if Amazon follows suit, force a recalibration of how profitable it can be this year.

The performance of AWS and the company’s spending plans will likely be a main focus of Amazon’s results, due after the market close. Shares hit a record earlier this week, and have risen nearly 50% off an August low. The stock gained 0.7% on Thursday.

“If the trend of relative cloud weakness is real, as it appears to be, we could see shares move lower if AWS disappoints,” said Dan Genter, who oversees about $8 billion as chief executive officer of Genter Capital Management. “We want to see margin improvement, and if we don’t see continued revenue growth, we will be entirely dependent on cost cutting for that at a time when companies are spending a lot more.”