Amazon Cloud Sales in Focus After Microsoft’s $500 Billion Rout

All eyes will be on Amazon.com Inc.’s cloud business when the technology giant reports earnings on Thursday, after shares of Microsoft Corp. plunged last week due in part to slowing growth at its key cloud-computing platform.

This was not an issue for Amazon’s October earnings, as its shares jumped almost 10% following better than expected revenue from Amazon Web Services, also known as AWS. Now, however, fear is rippling through the tech sector, and Amazon investors are increasingly concerned that the slowdown at Microsoft’s Azure indicates broader weakness for cloud providers. Microsoft shares are down more than 15% since the report on Jan. 28, erasing roughly $500 billion in market value.

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“It isn’t clear how much of Microsoft’s disappointment might be due to company-specific issues and how much might reflect an overall slowing in the cloud space,” said David Miller, chief investment officer at Catalyst Funds, which holds Amazon shares in several portfolios. “If it’s the latter, that could carry over.”

Amazon shareholders are seeking catalysts for a stock that has been languishing for a while. It was the worst performer among the Magnificent Seven tech giants last year, rising just 5.2%, and is up less than 1% to start 2026. By comparison, the Nasdaq 100 Index jumped 20% in 2025, while the S&P 500 Index gained 16%, although Amazon is slightly underperforming both this year.

Wall Street expects Amazon to report a 21% year-over-year increase in AWS revenue in the fourth quarter to $34.8 billion. For the company as a whole, analysts project a 13% jump in fourth-quarter revenue to $211.5 billion and an 8% increase in adjusted earnings per share to $2.40.

On Wednesday, Alphabet Inc. reported strong cloud growth in its latest earnings, but the stock dipped in extended trading after the Google parent also said it plans to spend far more than expected on 2026 capital expenditures, the other issue hanging over tech shares. On Thursday, Microsoft shares were hit by a rare downgrade from analysts at Stifel, who cut the stock to hold from buy with a warning about Azure growth.

Amazon’s results come against a backdrop of anti-software sentiment that’s weighing on the entire tech sector as investors try to sort the winners and losers from the hundreds of billions of dollars being spent to develop artificial intelligence. Microsoft’s aggressive AI-related capital expenditures, alongside the slowing Azure growth, invited new questions about when these investments will pay off more substantially.

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