Investors question the AI boom as technology stocks face renewed pressure

2026, October 18

United States / Europe

Investor confidence in the artificial-intelligence sector has weakened amid concerns that the enormous cost of building AI infrastructure may not produce the expected returns. According to the Financial Times, Nvidia lost more than $350 billion in market value during the previous week, while the Philadelphia Semiconductor Index fell 11% and the Nasdaq 100 declined 5.5%.

Markets are now looking to upcoming quarterly results from Meta Platforms for clues about whether heavy AI spending is translating into stronger revenue and profits. Results from other major technology companies, including Alphabet, Microsoft and Amazon, will also help shape investor expectations. Analysts are watching closely for signs that rising AI-related expenses could squeeze profit margins even as demand for computing capacity remains strong.

Why it matters: A sustained technology sell-off could affect pension funds, investment portfolios and business confidence worldwide. The key question is whether the commercial benefits of AI will justify the industry's enormous spending commitments.

Source: Financial Times — Will Meta's earnings restore confidence in the AI boom?