US stocks: S&P 500, Nasdaq end lower as crude prices jump, chip stocks weigh

The decline in semiconductor stocks on Thursday, despite their significant gains earlier in 2026, reflects how specific company news can influence broader market segments. The report regarding OpenAI's revenue overstatement appears to have contributed to investor caution regarding the chip sector, even as other factors like rising oil prices and interest rate hike expectations also weighed on the wider market.

This situation highlights the interconnectedness of the technology sector, where a report concerning a prominent AI firm can affect the valuation of its suppliers and partners. The article also mentions that Broadcom and Oracle, reportedly pursuing significant financing for OpenAI, saw their shares fall, suggesting investor sensitivity to potential debt issuance and its implications for capital competition. Memory-chip giant Samsung Electronics also saw its shares close lower in South Korea.

The market's reaction to the OpenAI revenue report, alongside broader economic concerns, indicates that investors are evaluating the actual financial performance of leading AI companies against their perceived market value and growth projections. This scrutiny can influence sentiment toward the entire AI and semiconductor industries, impacting investment decisions in related technologies.