Tech Stocks Fall as AI Investment Approaches $1 Trillion, Earnings Disappoint

US tech stocks experienced sharp declines this week as companies commit hundreds of billions of dollars to artificial intelligence, while simultaneously reporting earnings that have failed to meet analyst expectations. Intel’s stock plummeted 28% on Friday, contributing to a 12% drop for Alphabet on Thursday, which saw its market value fall by over $500 billion (£374bn) after revealing that AI-generated search summaries are impacting advertising revenue. Alphabet anticipates spending up to $205 billion this year on AI investments. Meta, Amazon, Oracle, and Microsoft have collectively committed to spending $800 billion on AI by 2026.

Beyond Alphabet and Intel, Amazon and Reddit also saw their stock prices fall. Amazon reported a six-fold increase in spending over three months, committing $220 billion this year to AI data centers and related infrastructure. Reddit’s stock plunged 29% following weaker-than-expected user numbers and concerns that Google’s AI-driven search is reducing referral traffic. Roblox also experienced a decline, with its daily active user numbers dropping and stock falling 18%. Intel’s finance chief, David Zinsner, stated the company does not expect to generate more cash than it spends this year and forecasts lower-than-expected fourth-quarter revenue, citing a continuing slowdown in PC demand. He indicated increased investment in equipment, expected to be “even more significant” in the coming months.

Analysts are questioning the return on these massive AI investments. Chris Low, from FHN Financial, suggested that questions remain about the payout from the huge investments in AI. Further complicating the picture, reports indicate that Anthropic could receive a junk rating after its planned IPO, adding to concerns about the borrowing spree among Big Tech companies.

What is not yet known

• The long-term impact of AI-generated search summaries on Google’s advertising revenue remains to be seen.
• Whether the current stock declines represent a temporary correction or the beginning of a broader AI bubble is unresolved.

Background

• US tech stocks fell significantly in late October 2026, coinciding with concerns about debt, interest rates, and oil prices [Fact Refinery, 2026-10-16].
• The US economy experienced 3.4% growth in the third quarter of 2026, fueled by consumer spending and AI investment, though inflation also rose to 3.6% [Fact Refinery, 2026-10-29].
• Spending on AI-generated advertisements in US midterm campaigns exceeded $100 million in late October 2026, with political action committees frequently funding these ads [Fact Refinery, 2026-10-24].
• AI investment is increasingly impacting economic indicators, with businesses significantly increasing investment in chips and data centers [Fact Refinery, 2026-10-29].

Our reading

Our reading is that a significant level of investor anxiety is present, despite continued high levels of AI investment. The simultaneous earnings disappointments and massive spending commitments suggest a disconnect between projected future returns and current performance, raising questions about the sustainability of the current tech investment cycle. The market appears to be reacting negatively to the immediate financial impact of these investments, even as companies double down on them.

What to watch

• The release of fourth-quarter revenue figures for Intel, to assess whether the forecasted slowdown in PC demand has materialized as predicted [Intel investor relations].
• The final IPO rating assigned to Anthropic, which could indicate broader investor sentiment toward Big Tech’s borrowing spree [Rating agencies like Moody’s, S&P, Fitch].
• Google’s next earnings report, specifically data on advertising revenue and the impact of AI-generated search summaries [Alphabet investor relations].

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