Intel suffered its worst single-day fall since 1974 in US trading on October 30. The third-quarter results themselves were not bad: revenue reached 16.5 billion dollars, up 21 percent year on year, while data center and AI revenue hit 7.3 billion dollars, up 78 percent. What crushed the shares was the fourth-quarter guidance: revenue of 15 to 16 billion dollars, far below the 17.1 billion analysts expected. The market answered with a 29 percent drop in one day: money for AI infrastructure keeps flowing, but returns must now be shown with hard evidence.
The details of the report split in two directions. Adjusted earnings per share came in at 52 cents, above the expected 40 cents; yet the client computing and physical AI business, about half of revenue, fell 5 percent to 8.1 billion dollars, missing expectations. Chief Financial Officer David Zinsner said the slowdown in the personal computer market would last at least into the first half of 2027, and client revenue could fall by more than a fifth again in the fourth quarter. Rising memory prices are also squeezing the business: suppliers are shifting capacity toward high-bandwidth memory for AI systems, raising costs for computer makers. Separately, an explosion at the company's plant in Israel this month killed two people, and Intel expects the accident to reduce revenue by about 600 million dollars over two quarters. Intel closed at 65.76 dollars, against 92.07 dollars the previous session.
The sell-off did not stop at Intel
Nvidia, Broadcom, AMD, Arm, Qualcomm and Micron fell 4 to 12 percent on October 30, Dell, Hewlett Packard Enterprise and Super Micro Computer fell 6 to 11 percent, South Korea's KOSPI index dropped 3.5 percent and Samsung Electronics fell about 3 percent. The Nasdaq Composite fell 2.9 percent to close at 25,437, and the S&P 500 fell 1.8 percent. The decline was not an isolated event; selling had been building all through October, as this review of the Nasdaq 100's October fall of more than 5.8 percent shows. The Associated Press quoted a portfolio manager as saying the market was moving from a “hopes and dreams” phase to a “show us the results” phase. The scale of infrastructure spending promised by the giants is just as striking; see the background on five giants' AI infrastructure pledges above 3 trillion dollars.
One company's results expose a crack in the AI cycle
Intel's awkward position is that the same AI cycle lifts one side of its business while crushing the other: the stronger data center demand grows, the more memory and capacity tilt toward AI, and the greater the cost pressure on the personal computer business. Guidance also cut the gross margin outlook from 44.1 percent in the third quarter to 38 percent, pressuring profitability. Intel's shares had more than doubled during 2026, so the high expectations before the report made the disappointment sharper. What comes next depends on whether personal computer demand keeps sliding as guided in the fourth quarter, and whether data center growth can hold up. Apple reports next week and Nvidia in mid-November, the next reference points for judging the returns on AI spending.
