AI Spending Fears Trigger $1 Trillion Tech Stock Selloff

Growing concerns over artificial intelligence investment returns triggered a massive selloff across US financial markets on Friday, October 30, 2026, wiping out more than $1 trillion in technology stock value. Disappointing corporate earnings, escalating infrastructure spending and weaker financial guidance intensified investor concerns about the sustainability of the AI boom.

According to Yahoo Finance and NBC News, the Nasdaq Composite dropped 2.8%, while the S&P 500 declined approximately 2%. The Dow Jones Industrial Average lost 1.2%, equivalent to more than 650 points. The Nasdaq 100 fell 3.4% during afternoon trading, recording its steepest daily decline since mid-June.

The technology-heavy Nasdaq 100 approached correction territory, generally defined as a decline of at least 10% from a recent record high. For October, the Nasdaq Composite lost 5.2%, its worst monthly performance since March 2025, while the S&P 500 declined 1.2%. The Dow finished the month 1.5% higher.

Alphabet suffered one of the largest losses after missing revenue expectations and revealing substantial cash expenditure. Its shares plunged nearly 13% on Thursday, erasing approximately $482 billion in market value, before falling another 1.4% on Friday, according to NBC News.

Amazon also disappointed investors after reporting earnings of $1.89 per share, below the $1.96 forecast. Chief Executive Andy Jassy maintained that the company would continue investing heavily in artificial intelligence infrastructure.

"We still expect 2026 cash [capital expenditures] of approximately $220 billion, the majority for AWS, and expect to spend meaningfully more in 2027," said Andy Jassy, Amazon CEO.

According to NBC News, Amazon shares initially fell as much as 10% in after-hours trading before recovering. They ultimately closed Friday 1.4% lower. Slower growth in its online shopping business also contributed to investor concerns.

Intel experienced an even sharper setback after its fourth-quarter revenue forecast fell below market expectations. Its shares plunged approximately 29%, marking the company's worst single-day decline based on historical data dating to the 1980s, according to NBC News.

Intel CEO Lip-Bu Tan acknowledged manufacturing and supply constraints affecting the company's ability to meet customer demand.

"I'm disappointed that we were not able to meet strong customer demand in this quarter. We face near-term challenges, including manufacturing, supply shortage, the unprecedented memory crunch and the resulting softness in PC demand," said Lip-Bu Tan, Intel CEO.

The weakness extended across the semiconductor industry. SanDisk shares dropped 13%, while AMD, ARM Holdings, Qualcomm and Marvell each declined approximately 10%. The Philadelphia Semiconductor Index fell 7.2%, while shares of data center infrastructure companies Nebius and CoreWeave also lost more than 10%.

Investors increasingly questioned whether massive spending on AI data centers would generate sufficient financial returns. NBC News reported that some major customers had tightened their AI token budgets, adding pressure to expectations surrounding future demand.

Meanwhile, Federal Reserve Chair Kevin Warsh addressed the market turmoil following the central bank's October meeting. The Federal Reserve maintained interest rates at 3.75% to 4% in a 10-2 vote on Wednesday.

Warsh highlighted the influence of monetary policy across financial markets.

"Interest rates get in the cracks. Interest rates affect directly or indirectly almost everything," said Kevin Warsh, Federal Reserve chair.

According to the Detroit Free Press, third-quarter US economic growth reached 3.4%, exceeding the 3.2% consensus forecast. However, the Personal Consumption Expenditures price index accelerated to 3.6% from 3.4%, complicating the outlook for monetary policy.

The shift toward defensive investments also benefited government bonds and selected industries. The 10-year Treasury yield declined to 4.94%, briefly touching 4.89%, while the two-year yield reached 4.62% and the 30-year yield stood at 5.31%.

Health care stocks gained more than 10% during October, outperforming the broader S&P 500 by the widest monthly margin since November 2000. ExxonMobil and Chevron also briefly reached record share prices as stronger refining margins supported their earnings amid the Middle East conflict.

Michigan's automotive industry recorded gains despite the broader market weakness. General Motors shares advanced approximately 14% during the week, their strongest weekly increase since October 2025. The company also announced plans to transfer its stock listing to Nasdaq on November 17 and prepare its Lansing Delta Township plant for hybrid vehicle production.

Ford shares rose approximately 5% following stronger-than-expected quarterly results. The company reported revenue of $49.53 billion and adjusted earnings of 49 cents per share, beating forecasts of $46.24 billion and 41 cents, respectively.

Ford also raised the lower end of its full-year profit outlook to $10.5 billion. Chief Executive Jim Farley highlighted the company's financial performance and ongoing restructuring efforts.

"Ford delivered a strong quarter as we're entering a defining phase of the company's transformation," said Jim Farley, Ford CEO.

Meanwhile, oil prices climbed, with Brent crude reaching $112 per barrel and West Texas Intermediate crude hitting $104. Bitcoin also declined more than 2% amid cryptocurrency market volatility following a reported $6.3 billion security breach involving Binance, according to Yahoo Finance.