Intel Fell 28.5% in One Day. The Week the AI Trade Snowballed Gave the Nasdaq Its Worst Month in More Than a Year

First Alphabet, then Amazon, then Intel. A wobble turned into the Nasdaq's worst month in more than a year. For the week, nine of the 11 S&P 500 sectors rose. The selling lived in the AI corner.

By Sean Anees Saifi · Capital Wealth · Published Sunday, November 1, 2026 · Source: The Wall Street Journal Weekend, Saturday/Sunday, October 31 – November 1, 2026, whose market figures are the Friday, October 30 close (Page One)

Key Points

Friday, Oct. 30: the Nasdaq fell 2.86%, its worst day since June and the end of its worst month in more than a year. The S&P 500 fell 1.82% to 7,580.07. The Dow lost 1.09%.
Intel (INTC) crashed 28.5%, its worst day on record. Two of its biggest holders, the U.S. government and Nvidia, lost more than $17 billion on paper.
Alphabet fell 13% on Thursday after its search-ad growth slowed, its worst day ever. Amazon reported negative cash flow after heavy AI spending, and its sales missed.
Meta sold $25 billion of new stock this week, and Microsoft announced a $25 billion bond sale, to help pay for the build-out. The Journal's editorial page names Nvidia and Micron as the chip makers exposed if the spenders pull back.
The counterweight: for the week the S&P 500 lost only 0.57%, the Russell 2000 rose 1.29%, and energy rose 1.00%. The 10-year yield slipped to 4.928%.

28.5%

Intel's one-day drop Friday, Oct. 30, its worst day on record

2.86%

Nasdaq Composite's fall Friday, closing its worst month in more than a year

$25 billion

Meta's new stock sale this week; Microsoft announced a bond sale of the same size

+1.29%

Russell 2000 for the week of Oct. 26 to 30, while nine of 11 sectors rose

A single bare silicon wafer resting on the corner of a brushed steel bench under cool raking light, its surface catching a faint rainbow sheen.

The Nasdaq closed Friday, Oct. 30, at 25,437.00, down 2.86% on the day, 7.84% under its Oct. 6 record, and off a worst-month-in-a-year October.

In one line: The AI trade snowballed into the Nasdaq's worst month in over a year, while the rest of the market mostly rose on the week.

Intel (INTC) lost 28.5% on Friday, Oct. 30. It was the worst day in the company's history. It capped the week the AI trade stopped being a sure thing. The Nasdaq fell 2.86%, its worst day since June, and closed its worst month in more than a year. The S&P 500 fell 1.82% to 7,580.07. The Dow lost 1.09%.

The Journal's David Uberti and Hannah Erin Lang trace the slide. On Thursday, Alphabet (GOOGL) said its search ads grew more slowly, partly because people ask its AI mode instead. The stock fell 13%, its worst day ever. The editorial page puts the two-day loss at 14%, about $500 billion. Late Thursday, Amazon (AMZN) reported negative cash flow after heavy AI spending, and its sales missed. Then Intel said PC sales would stay weak, because the AI boom has made memory chips expensive. Intel's crash cost two of its biggest holders, the U.S. government and Nvidia (NVDA), more than $17 billion on paper.

Here's what changed. For months Wall Street cheered every dollar the giants spent on AI. Now the cash piles are thinner. Meta (META) sold $25 billion of new stock this week. Microsoft (MSFT) announced a $25 billion bond sale. The editorial board names the worry. If the big spenders pull back, their chip makers feel it. It names Nvidia and Micron (MU). Higher rates had already hit chip renters like CoreWeave (CRWV). Peter Boockvar of OnePoint BFG Wealth Partners called it "a major gut check for the market."

The selling lived in one corner

Step back from Friday and the picture changes. For the week, the S&P 500 lost only 0.57%. Nine of the 11 sectors rose, energy among them, up 1.00%. The Russell 2000, the small-stock index, rose 1.29%. Two groups did the damage. Communication Services fell 8.49% and Tech 1.77%. Tech is the index's biggest weight. Communication Services holds Alphabet and Meta. On Friday the equal-weight S&P 500 fund (RSP) fell 0.79%. The regular fund (SPY) fell 1.77%. The 10-year Treasury yield slipped to 4.928%.

So the S&P 500 closed about 3% under its Oct. 6 record of 7,818.93. It sits about 4% above 7,272, the 7% line in our October Letter, and about 10% above 6,863, our next North Star level. One correction to our record. No. 190 went out Friday on a midday pull with Intel down 30.66%. The final close was 28.5%, and the S&P 500 also finished above its midday level.

Our read

Investments/Risk, IN04. The lesson is where the selling lived. It lived in the AI corner. An S&P 500 index fund felt part of it, spread over 500 names. A tech fund, or a pile of one employer's stock, felt all of it. The desk's model books hold Micron in 23 books, Nvidia in 31, Intel in 3 and CoreWeave in one satellite sleeve at 16%. Held at weight, nothing trimmed. The last move was the first third of the North Star reserve, put to work on Saturday, Oct. 17. The rest waits for 6,863 or the week of Nov. 3, decided in writing after the vote. That's the desk's call for its model books, not advice.

Here's the check for your own plan this week. Open your 401(k) app and find the fund list. Add up what sits in tech funds, growth funds and any single stock. If that's more than a third of the account, you owned Friday's selling. Then make sure none of the money you'll need in the next two years rides in stocks. Bring the fund list to your next review and we'll sort the corner from the rest.

What It Means For Your Portfolio

Hold. Measure your AI corner. Keep near-term money out of stocks.

The week's loss lived in the AI corner. Know how much of your money sits there, and keep the next two years of spending out of stocks.

General planning principles, not advice for anyone in particular. Add up the share of your accounts in tech funds, growth funds and single stocks. A broad index fund spread Friday's loss. A tech fund or one employer's stock took all of it.

Money you'll need in the next two years belongs in Treasury bills or a money-market fund, where a 2.86% day in the Nasdaq doesn't reach it. The desk's model books held every chip and AI name at weight and trimmed nothing.