Why did the Nasdaq fall 573 points on October 16, 2026? Chip stocks, hot inflation and the worst week since June

The Nasdaq Composite fell 572.99 points, or 2.1%, to 26,140.03 on Friday, October 16, 2026, as chip stocks extended a selloff driven by doubts over how long the AI building boom can last. Intel fell 5.8% and Micron 5.6%, the S&P 500 lost 1.1% and the Dow 0.3%. For the week the Nasdaq dropped 4.5% and the S&P 500 1.9%, their worst weeks since June.

The selling came in a week of inflation reports hotter than forecast, rising bets on another Federal Reserve rate increase and open doubt over whether the borrowing behind AI data centers can be repaid.

The week day by day

1. Wednesday, October 14. September consumer prices rose 3.7% on the year, above the 3.6% forecast. The S&P 500 fell 1.11% and the Nasdaq 1.88%, the worst day for both since July. Dell fell 11.27% after Barclays downgraded it, and CoreWeave 15.46% as its bonds traded at distressed yields. Our minute-by-minute report on the CPI release has the first-minute moves in stocks, Treasury futures and gold.
2. Thursday, October 15. Producer prices rose 1.3% in September, the largest monthly increase since March 2022, and 6.3% on the year. South Korea's KOSPI closed 7.57% lower after a circuit breaker halted trading, and Japan's Nikkei fell 4.90%. In New York the Philadelphia chip index was down 3.3% during the day, extending losses that had reached $1.64 trillion over the prior six sessions, while the Dow rose 1.1% as money moved into banks and other cheaper stocks. The Nasdaq ended 0.1% higher.
3. Friday, October 16. Chip stocks fell again. The Nasdaq lost 572.99 points, and Brent crude rose 3.7% to $109.86 a barrel, its highest settlement since May 19.

Why chip stocks led the decline

Chipmaker valuations rest on the expectation that companies keep spending heavily on AI servers, and that week the demand, the financing and the pricing behind that spending were all questioned. A Barclays note argued that the strength in enterprise hardware sales came more from higher memory prices than from companies adopting AI. CoreWeave's 9.625% notes due 2032 traded at a yield near 15%, a level that signals bondholders doubt the company can carry roughly $50 billion of debt and lease obligations. Memory makers faced a separate worry about Chinese competition after CXMT reported progress on a new DRAM design, and a Counterpoint forecast put DRAM prices about 23% lower in 2028 than in 2027.

Higher interest rates make that kind of long-dated, debt-funded investment harder to finance. The Fed raised rates in September to a range of 3.75% to 4.00%, and after the CPI report futures put the chance of another increase at its October 27-28 meeting at about 37%.

The closes

The Dow finished the week higher because it holds fewer chipmakers and more banks, health care and industrial companies, which gained as investors sold technology. The Nasdaq lost 1,226.14 points over the five sessions.