SPY fell 1.79% as technology shares led a broader retreat, Treasury yields eased and oil rose on fresh supply concerns.
U.S. stocks fell sharply, with SPY down 1.79% on the session and the S&P 500 losing 1.82%. The day’s damage was concentrated in technology: the Nasdaq Composite fell 2.86%, the Nasdaq 100 dropped 3.5%, and the MSCI World Index declined 1.5%. The S&P 500 also slipped below its 100-day moving average, while the Nasdaq 100 briefly entered correction territory, according to Bloomberg reporting via Swissinfo.
The central question for investors was whether the vast sums flowing into artificial intelligence infrastructure can earn an adequate return. Recent results and outlooks sharpened concerns about cash demands and the health of the businesses expected to fund the investment. Intel plunged 28.6%, its largest decline in more than four decades, after its fourth-quarter profit forecast fell well short of analyst expectations, according to The Associated Press. Reuters reported that indications of slowing PC demand added to pressure on the chipmaker and suggested weakness could persist through 2027.
Amazon also came under scrutiny after reporting substantial cash burn alongside heavy investment in AI infrastructure. Bloomberg’s reporting identified the broader concern: the core businesses of major U.S. technology companies are supporting roughly $750 billion in AI spending in 2026. If advertising, consumer or retail operations weaken, investors may question whether those companies can sustain spending—or when the investment will translate into profits. S&P Global Ratings also moved toward a possible downgrade of Meta within two years, citing elevated AI spending and balance-sheet pressure, according to Bloomberg via Swissinfo.
The move was more than a routine reaction to individual earnings reports. Reuters said the PHLX Semiconductor Index fell more than 7%, its largest daily decline since late June, and the S&P 500 technology index dropped 4.2%, its weakest session since early June. Apple reclaimed the title of the world’s most valuable company from Nvidia as investors sought relative safety in the iPhone maker, Bloomberg reported. That shift suggests investors were reassessing risk within technology, not abandoning the sector uniformly.
Government bonds gained as equities retreated. The 10-year Treasury yield fell 5.8 basis points to 4.931%, the 30-year yield declined 1.97 basis points to 5.3093%, and the two-year yield dropped 6.64 basis points to 4.59%, Reuters reported. Bond prices and yields move in opposite directions; the lower yields were consistent with investors seeking shelter, though the day’s data alone do not establish a lasting change in interest-rate expectations.
Oil moved in the opposite direction. U.S. crude settled at $104.12 a barrel, up 2.08%, while Brent reached $117.63, up 2.4%. Reuters linked the rise to a tanker attack in the Strait of Hormuz, which heightened concern about supply disruptions. That matters beyond energy investors: sustained increases in crude can feed into fuel and transportation costs. A MarketWatch report in the supplied material also warned that U.S. households heating with oil could pay $750 more this winter as heating-oil prices reach record highs.
The supplied reporting did not provide a reliable foreign-exchange move for the session, so the dollar’s direction cannot be established here. For working households, the day offered two practical signals: markets are demanding clearer evidence that AI spending will pay off, and higher oil prices could add pressure to household budgets if the supply concern persists. One volatile session does not settle either question, but the contrast between falling shares, lower Treasury yields and rising crude captures the competing risks investors were weighing.

