Semiconductor stocks retreated from their October highs this week as investors questioned whether the industry’s revenues are keeping pace with the market’s AI-driven expectations, according to reports.
The iShares Semiconductor ETF had advanced for five consecutive sessions and the sector’s largest company had reached a record high before the pullback. Sentiment shifted after a report that OpenAI had told investors its annualised revenue was nearing $50 billion at the end of September — below the roughly $70 billion figure cited in earlier media reports, according to the coverage.
Because chip valuations are closely tied to expectations for AI infrastructure spending, the report weighed on the group, and the PHLX Semiconductor Index finished the week lower even as the broader market held up better. The pullback follows a powerful run: the index was up 73% year to date as of late September, with several of the sector’s largest constituents posting triple-digit gains in 2026.
Higher long-term Treasury yields and rising crude oil prices added pressure midweek, as higher discount rates tend to weigh most on companies valued on long-term growth expectations. Company-specific developments — including record milestones reported by two firms earlier in the week and open questions around a manufacturing partnership, ongoing litigation and the sustainability of AI-related demand — shaped performance within the group.
The episode underscores how tightly the market’s AI narrative is now coupled to a small number of private-company revenue signals — and how quickly enthusiasm can turn when those signals come in softer than expected.
