Wall Street’s unease over the rising cost of building artificial intelligence has been building quietly for months. Now those concerns are starting to surface.
Microsoft delivered solid earnings on Wednesday, but investors focused on slowing growth in its Azure cloud business and the more than $100 billion it plans to spend on capital investments this year. The stock fell 10% the following day and continued sliding on Friday, erasing $381 billion in market value over two sessions and marking its worst week since March 2020.
“In normal conditions, these results would look strong, but with this level of spending and expectations set so high, companies have very little room for error,” said Josh Chastant of GuideStone Funds, which holds Microsoft shares.
The contrast was highlighted by Meta, which forecast its fastest revenue growth in more than four years. The stock jumped 10% on Thursday, even as the company said it could raise capital spending by up to 87% in 2026, before retreating 3% on Friday.
The split reaction shows how narrow the path has become for Big Tech. Investors are willing to accept heavy AI spending only if it delivers clear growth. Without it, stocks are punished.
Market focus now shifts to Alphabet and Amazon, both major AI spenders, which are expected to report earnings this week. Together with Microsoft and Meta, they are projected to spend more than $500 billion on capital investments this year, much of it on AI infrastructure.
Alphabet has been the standout performer, up more than 70% in six months, driven by enthusiasm around Google’s Gemini AI and custom chips. Its shares recently hit a record and are trading at their highest valuation in nearly 20 years.
Amazon is also under pressure to sustain momentum after strong growth at AWS. But some investors warn that expectations across tech may be too high, and that returns may not justify the scale of investment.
Many funds have already started reducing exposure to the sector. Tech stocks have lagged the broader market in recent months, while companies like Oracle have seen sharp declines amid doubts over whether AI spending will pay off.
Analysts say the only way to restore confidence is for companies to prove they can turn massive AI investments into real profits. Until then, markets may see more volatility and setbacks.