Wall Street ended a difficult week on a sour note on Friday, as a renewed slide in technology stocks pushed the major indexes lower. The Nasdaq Composite took the brunt of the damage, while the Dow Jones Industrial Average held up far better thanks to strength in energy shares. Investors continued to worry about how the artificial intelligence boom is being financed, with heavy debt loads at data-center companies and rising borrowing costs putting pressure on some of the market’s biggest growth names. Nearly two-thirds of U.S. stocks declined, and the Nasdaq finished more than 4% lower for the week.
What Moved Markets
The Dow Jones Industrial Average closed at 52,002.41, down 175.28 points, or 0.34%. The S&P 500 fell 84.62 points, or 1.09%, to 7,659.44. The Nasdaq Composite dropped 572.99 points, or 2.14%, to 26,140.03. Small companies fared poorly too, with the Russell 2000 falling about 1.7% to roughly 2,720.
Stocks started the day mixed but weakened as technology shares sold off. The S&P 500 technology sector fell more than 3%, making it the weakest corner of the market. Analysts pointed to the hotter-than-expected inflation report earlier this week, which pushed Treasury yields higher and made investors more sensitive to the cost of borrowing money to build AI infrastructure. In simple terms, when interest rates rise, companies that rely on debt to grow tend to look riskier, and their stock prices can suffer.
Energy was the bright spot. The sector gained about 2.5% as oil prices rose sharply, with Brent crude testing $110 a barrel and U.S. crude trading near $101 during the afternoon. Ongoing tensions in the Middle East continue to keep supply concerns front and center. Higher oil prices can feed into inflation, which is one more reason the broader market struggled to find its footing.
Notable Movers
CoreWeave (CRWV) was one of the day’s biggest laggards, falling more than 11% at midday. The cloud-computing company carries about $50 billion in debt and has become a focal point for worries that the data-center buildout is being fueled by credit. Nvidia CEO Jensen Huang tried to calm nerves, saying he is optimistic about the company, but the stock still sold off alongside other AI-linked names such as Nebius, which also dropped more than 11% at midday.
Twilio (TWLO) slid roughly 12% at midday as investors took profits after the stock’s recent addition to the S&P 500 and as valuation worries grew ahead of its third-quarter earnings report on October 29. Moderna (MRNA) fell about 10% in morning trading as investors trimmed positions ahead of a major cancer vaccine data presentation expected later this month.
On the upside, Tesla (TSLA) was higher in early trading after unveiling a redesigned Roadster at SpaceX’s Texas test facility. Semtech (SMTC) rose more than 4% in premarket trading after raising its quarterly revenue and earnings guidance. Several energy producers also gained as crude prices climbed. Note that some of these moves reflect midday or early-session levels rather than final closing prices.
Looking Ahead
Investors will be watching for any signs that the AI-related selloff is stabilizing or spreading. Earnings season continues next week, with Netflix (NFLX) scheduled to report third-quarter results on October 20, followed by Nucor (NUE) on October 26 and Twilio on October 29. Big Tech earnings later this month will be closely scrutinized for evidence that heavy AI spending is turning into real revenue and cash flow. Traders will also keep an eye on oil prices, Treasury yields and the next inflation readings, since all three are shaping how much risk investors are willing to take. As always, a single week of volatility is not a trend, and investors should consider their own goals and time horizon before making changes to a portfolio.