• Microsoft shares fell 4% in Thursday trading, marking their worst single-day drop in months.
  • The decline was driven by investor unease over rising capital expenditures tied to artificial intelligence infrastructure.
  • Analysts warn that without clear near-term revenue from AI, heavy spending could pressure margins.

Market Jitters Over AI Investment

Microsoft Corp. extended its slide on Thursday, with shares dropping 4% as Wall Street grew increasingly wary of the company's aggressive spending on artificial intelligence. The selloff erased billions in market value, highlighting a growing tension between big tech's AI ambitions and investor demands for profitability.

According to people familiar with the matter, the company's capital expenditures have surged as it races to build data centers and secure specialized chips. While Microsoft has touted its Copilot AI assistant and Azure cloud growth, some investors worry that returns from these investments may take longer to materialize than expected. "The market is starting to question the ROI on AI spend," said one analyst who asked not to be named because they are not authorized to speak publicly.

The broader tech sector also felt the heat, with the Nasdaq Composite falling 1.2% as traders rotated out of megacap stocks. Microsoft's decline contributed to a loss of over $100 billion in market capitalization for the company.

Cloud Growth Amid Cost Pressures

Microsoft's Azure cloud platform remains a key growth driver, posting 29% revenue growth in its most recent quarter. However, the cost of expanding capacity for AI workloads is eating into operating margins. CFO Amy Hood had previously signaled that capital spending would increase sequentially, but the magnitude has caught some off guard.

A Microsoft spokesperson declined to comment on the stock movement, directing attention to its latest earnings report. The company is scheduled to report fiscal first-quarter results later this month, which will be closely watched for updates on AI monetization.

Analyst Perspectives

Several analysts lowered their price targets on Microsoft this week, citing elevated capex and uncertain AI demand. "We remain bullish long-term, but the near-term pain is real," wrote a Goldman Sachs analyst in a note. Others, however, see the dip as a buying opportunity, pointing to Microsoft's strong enterprise relationships and diversified revenue stream.

This article was updated to include additional analyst commentary.