October ended with the sharpest tech sell-off in months, and Intel (NASDAQ: INTC) was at the center of it. The chipmaker's shares fell about 29% Friday, after it forecast fourth-quarter revenue of $15 billion to $16 billion and adjusted earnings of 25 cents a share, against roughly $17 billion and 43 cents expected, Yahoo Finance reported, putting the stock on pace for its worst day since 1974. The company pointed to weaker PC demand as soaring memory prices push up the cost of computers, CNBC reported.

That is a twist on the AI story. Memory makers are shifting capacity toward AI data centers, and the resulting price spike is hurting the PC business Intel still depends on. The damage spread quickly: Nvidia (NASDAQ: NVDA) fell 4.2% to $204.64, AMD (NASDAQ: AMD) dropped nearly 11% and Sandisk (NASDAQ: SNDK) lost about 13%, according to Reuters. The S&P 500 fell 1.8%, its worst day since June and its third straight losing week, while the Nasdaq composite dropped 2.9%, AP reported. Tech stocks shed more than $1 trillion in value, NBC News reported.

Amazon (NASDAQ: AMZN) added to the unease. Its shares slipped about 1.4% after earnings, Reuters data showed, as the company stood by roughly $220 billion in capital spending for 2026, mostly for its AWS cloud unit, and signaled more to come next year, CNBC reported. Investors this week have drawn a sharp line between companies whose AI spending is turning into cash and those whose spending is running ahead of it. Microsoft, Meta, Amazon and Alphabet have accounted for more than a third of all capital spending by S&P 500 companies over the past 12 months, Capital Economics said, according to Reuters, and that share looks likely to rise.

The broader picture is less dramatic than Friday's headlines. CNBC noted that the S&P 500 remains only a few percent below its record, even as the iShares Semiconductor ETF has fallen into a bear market, down about 29% from its recent high. Investors appear to be rotating within the market rather than leaving it.

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Tickers: NASDAQ:INTC, NASDAQ:NVDA, NASDAQ:AMD, NASDAQ:SNDK, NASDAQ:AMZN

Why it matters

Demand for AI computing is still growing, but this week showed investors are now demanding proof that the spending pays off, and that the AI boom can hurt companies outside it, such as PC chipmakers. This is reporting only, not investment advice.

Sources

• Yahoo Finance, "Intel stock plunges nearly 30%, on pace for its worst day since 1974" (Oct. 30, 2026)
• CNBC, "Amazon, Intel shares fall after earnings amid AI spending concerns" (Oct. 30, 2026)
• Reuters via Investing.com, "October ends with a thud for Intel, Reddit, AI stalwarts" (Oct. 30, 2026)
• AP, "Wall Street drops to its worst day since June after the sell-off for tech stocks deepens" (Oct. 30, 2026)
• NBC News, "Tech stocks wipe out more than $1 trillion amid AI boom fears" (Oct. 30, 2026)
• CNBC, "AI stocks sell off as investors question AI spending returns" (Oct. 30, 2026)

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