The Intel stock drop on Friday, October 30, came just a day after the chipmaker posted a strong quarter, and it was one of the worst single-session declines in the company’s history. Shares fell as much as roughly 26% intraday, and Yahoo Finance reported the stock was on pace for its worst day since 1974. Reported declines range from about 17% to nearly 30%, depending on whether an outlet measured after-hours trading, premarket prices, the session low or the close.

The trigger was a forecast, not the quarter itself. CNBC reported that Intel shares fell in extended trading on Thursday after the company guided fourth-quarter results weaker and cited continued softness in the PC market. Friday’s regular session turned that after-hours slide into a steep selloff.

Why Intel stock fell after a strong quarter

Intel reported third-quarter results after the close on Thursday, October 29. AOL reported adjusted earnings per share of $0.52 and total revenue that rose 21% to $16.5 billion. Those headline numbers beat expectations, but investors focused on what Intel expects next.

The broader market also slid. The Nasdaq fell more than 2% at the open as tech earnings deepened worries about whether Big Tech’s AI spending is paying off. Intel’s drop landed in the same week that Alphabet and other large technology companies reported results.

The AI data center growth story

Data center and AI revenue rose 78% to $7.3 billion. Yahoo Finance reported that analysts described that growth as the fastest in about 15 years. For a company that spent years losing ground in AI hardware, that is a meaningful turn.

Benchmark analyst Cody Acree said the data center business was on track and beat estimates by about $500 million, according to Benzinga. He still called the guidance a significant miss. That split captures the market’s dilemma: the growth engine is running, but the rest of the company may not keep pace.

Intel expects demand for its Xeon server chips to exceed supply through the first half of 2027, according to TradingKey. That source labeled part of its article as an AI-generated summary, so the claim deserves confirmation against Intel’s own filings. Analysts describe the core question as whether Intel can add enough server chip supply to meet that demand.

The money flowing into AI infrastructure is visible across Big Tech. USA 24 reported that Microsoft booked $10 billion from OpenAI in one quarter, about 11% of its revenue.

The PC business is the weak spot

Client computing revenue, the segment that covers Intel’s PC chips, fell 5% year over year to $8.1 billion and missed estimates. That decline is the reason the forecast landed so hard. Acree described Intel as “still PC dependent” on CNBC’s Closing Bell Overtime, a phrase that sums up investor worry about a company whose AI growth is strong but whose largest traditional business is shrinking.

Coverage of the story also links the PC slump to a memory-chip squeeze. Yahoo Finance and other reports say AI data centers are absorbing memory chips, which pushes up prices for laptops and desktops and weighs on PC demand. Intel has said the PC slump will not end until memory supply normalizes, and analysts expect weakness to persist through at least the first half of 2027.

Why the fourth-quarter forecast disappointed

The guidance was the real shock. Here are the key figures from the fourth-quarter outlook:

  • Revenue: $15 billion to $16 billion, versus roughly $17 billion that analysts expected.
  • Adjusted EPS: $0.25, versus $0.43 expected.
  • Non-GAAP gross margin: 38%, down from 44.1% in the third quarter.

The margin drop is about six percentage points in a single quarter. When gross margin falls, each dollar of sales keeps less profit, which helps explain why the EPS guidance fell much further in percentage terms than the revenue guidance. Invezz and other outlets also highlighted the gap between Intel’s outlook and Wall Street’s models.

What is driving the shortfall

Intel pointed to several causes, and the coverage describes three main ones:

  • PC weakness and memory costs: Client computing revenue fell, and memory-chip shortages pushed up device prices.
  • Packaging substrates: CEO Lip-Bu Tan attributed part of the shortfall to short supplies of packaging substrates.
  • The Israel factory: An explosion at the Kiryat Gat site on October 14 is expected to cost about $300 million of fourth-quarter revenue, according to Intel’s estimate.

The split among these causes is unclear. This story relies on press coverage rather than Intel’s earnings release or investor presentation, and no source reviewed provided a clean breakdown of how much of the gap of roughly $1 billion to $2 billion comes from each factor. Demand for AI hardware has drawn enforcement attention as well. USA 24 reported that Malaysia seized $12 million in AI servers at Kuala Lumpur’s airport.

How big the drop was, and why the numbers conflict

The percentage decline depends on the measurement. Intraday, Intel fell as much as roughly 26%. Yahoo Finance said the stock was on pace for a drop of nearly 30%, while Invezz reported a 17% decline. Those differences largely reflect whether a figure captured after-hours trading, premarket prices, the session low or the final close.

Prices also conflict. One source reported shares at about $65.15 on Friday morning, while another reported about $70.16 in overnight trading. No official closing price or final percentage decline is confirmed in the sources reviewed for this story.

For context, Yahoo Finance’s data going back to May 1973 shows two worst days for Intel: July 5, 1974, when shares fell nearly 30%, and August 2, 2024, when they fell about 26%. Yahoo Finance said the stock erased more than $100 billion in market value, and one Yahoo piece cited more than $125 billion. Those are large losses for a company that is a major holding in index funds and retirement accounts.

What investors and buyers should do now

This is general information, not investment advice, but a few steps are practical:

  • Check how much Intel and semiconductor exposure your index funds, sector ETFs and 401(k) plans hold. Overlapping holdings can be larger than they look.
  • Avoid making single-day decisions based on intraday prices, which were still moving and conflicting in coverage.
  • Read Intel’s own earnings release and investor presentation, which were not reviewed for this story, before drawing conclusions about the fourth-quarter breakdown.
  • If your company buys Intel server chips, plan procurement early. TradingKey’s report suggests supply could stay tight through the first half of 2027.
  • If you are shopping for a laptop or desktop, compare prices now. Coverage ties higher memory costs for AI data centers to rising device prices.

What to watch next

The next signals are concrete. Watch whether memory supply normalizes, because Intel has tied the PC slump to that recovery. Watch whether packaging substrate supply improves and whether the Israel factory returns to normal output on the timeline Intel has described.

Analysts are split on whether this selloff reflects a temporary PC problem or a broader AI-spending concern. Intel’s next quarterly report will show whether server demand can convert into revenue, and whether the margin decline is a one-time event or a longer trend. Investors will also watch how Big Tech’s AI spending holds up in the quarters ahead.