Wall Street fell sharply on October 16 as AI infrastructure names extended a brutal selloff and a surge in crude prices rattled traders heading into the weekend, putting the Nasdaq on track for its worst week since June and the S&P 500 for its steepest weekly drop since January.
The AI trade unwinds
Nvidia-backed CoreWeave dropped 12 percent, extending its five-session loss to roughly 25 percent, while its bonds sold off hard enough to push yields above 15 percent. Broadcom fell 3.6 percent and the PHLX semiconductor index sank 2.5 percent, marking its eighth consecutive day of declines. The pressure coincided with a Reuters report that current and prospective Anthropic investors are weighing a lower valuation for the company’s upcoming IPO, adding to doubts about whether debt-laden AI infrastructure firms can turn profits fast enough to service their borrowings as financing costs rise.
Oil adds to the pressure
Crude jumped more than 3 percent on Middle East supply worries, a move that US Bank Wealth Management strategist Rob Haworth said tends to compress equity price-earnings multiples and encourages caution into the weekend. Hotter-than-expected consumer and producer inflation reports earlier in the week had already shown price pressures spreading beyond energy, and Federal Reserve Chair Kevin Warsh on October 16 expressed surprise at how well global economies have absorbed the energy shock and tighter policy. Markets now price the Fed holding rates steady this month, with Barclays projecting 25-basis-point hikes in both December and January.
Breadth tells the real story
The S&P 500 closed down 1.22 percent at 7,649.71, the Nasdaq lost 2.19 percent to 26,128.13, and the Dow slipped 0.55 percent to 51,891.77. Six of eleven sectors declined, led by communication services down 2.52 percent and information technology down 2.38 percent. Decliners outpaced advancers 1.3 to one. The index posted 19 new highs against one new low; the Nasdaq recorded 49 new highs and 263 new lows. For all the benchmark’s roughly 12 percent gain in 2026, the median component has risen only about 6 percent and 185 members are in negative territory year to date.
What comes next
Third-quarter earnings season accelerates next week with Tesla, Meta Platforms and Procter and Gamble. Analysts expect aggregate earnings to surge more than 30 percent, driven by the AI megacaps that have carried the index. Tesla shares fell 2.5 percent after the company unveiled a redesigned Roadster equipped with rocket-style thrusters developed with SpaceX. Netflix dropped 2.9 percent a day after naming former Disney executive Peter Rice as chief content officer.