2026-10-23

U.S. stocks closed lower on Friday, October 23, 2026, extending a risk-off wave as investors navigated continued fallout from artificial intelligence spending concerns and surging energy costs. The Dow Jones Industrial Average fell 1.23%, the S&P 500 lost 0.52%, and the Nasdaq Composite dipped 0.21%.

The macro backdrop was heavily influenced by a sharp spike in energy markets. Brent crude oil surged past $116 a barrel—reaching its highest level since June 2022—driven by intensifying geopolitical tensions in the Middle East. This oil shock compounded broader market jitters regarding shifting capital expenditure trajectories across the tech ecosystem.

Sentiment in the technology sector remained fragile following mixed mega-cap earnings updates earlier in the week, where shifting signals on artificial intelligence infrastructure spending triggered a broader reassessment of high-valuation growth names. However, pockets of resilience emerged within select semiconductor issues and cybersecurity names.

In corporate news, CrowdStrike ($CRWD) jumped more than 8% following widespread technical outages linked to a critical PHP security vulnerability that highlighted enterprise demand for automated threat mitigation. Meanwhile, market chatter focused on SpaceX exploring terrestrial tower access deals with infrastructure providers like Crown Castle ($CCI) to scale its direct-to-device mobile offerings.