Wall Street ended the week on a sour note. On Friday, October 16, a fresh wave of worry about how the artificial intelligence boom is being paid for collided with hotter-than-expected inflation data and a sharp jump in oil prices. Technology stocks took the biggest hit, and the Nasdaq Composite posted its worst week since June, according to CNBC.
How the indices closed
- Nasdaq Composite: 26,140.03, down 2.14%
- S&P 500: 7,659.44, down 1.09%
- Dow Jones Industrial Average: 52,002.41, down 0.34%
- Russell 2000: 2,719.57, down 1.72%
The day actually began on a mixed but calm footing, with the S&P 500 and Dow slightly higher at the open. Selling built through the session. By the close, nearly two-thirds of US stocks had fallen. The S&P 500 technology sector dropped more than 3%, while energy was the clear winner, rising about 2.5%.
Why stocks fell: three pressures at once
1. Questions about AI debt
The biggest driver was a renewed debate over whether the AI build-out can earn back what it costs. Cloud computing provider CoreWeave, which carries roughly $50 billion of debt and is not yet profitable, fell nearly 12% and set off a broader slide in AI-linked shares. Nebius dropped about 11%, and chip and networking names such as Coherent also fell as investors took profits.
Reuters has reported that concerns about credit-fuelled data-centre spending are also weighing on cash flows at bigger players such as Alphabet and Meta. Nvidia CEO Jensen Huang, whose company owns about 10% of CoreWeave, defended it, saying its "financial strength is improving every day" and that Nvidia does not need to backstop it.
Analysts increasingly describe the AI trade as splitting in two: companies that can fund data centres from their own cash, and those that must borrow. The borrowers are starting to trade like interest-rate-sensitive stocks, which makes them vulnerable when bond yields rise.
2. Hot inflation data
US consumer price data came in hotter than expected, pushing Treasury yields higher after they had eased on Thursday. Higher yields make expensive growth stocks less attractive and raise the cost of borrowing for capital-hungry AI companies.
3. Oil near $110
Brent crude tested $110 a barrel during the session, with US WTI trading near $101. The International Energy Agency plans to release the remaining 100 million barrels from its March stock release agreement, and the US is reported to be considering easing sanctions on some "shadow fleet" tankers to bring down record freight rates. Comments from President Trump that the US might strike Iranian nuclear sites again added to the risk premium.
Biggest movers
Losers: Bending Spoons (about -15%), Twilio (about -13%), Fastly (about -12%), CoreWeave (about -12%) and Nebius (about -11%). Moderna fell about 10% ahead of Phase 3 data for its cancer vaccine intismeran, developed with Merck. Netflix slipped after announcing layoffs and a new chief content officer.
Winners: energy stocks led the gainers. Honeywell Aerospace rose about 4%, Host Hotels about 3.4% and Nucor about 2.6%. Tesla climbed in early trade after revealing its long-awaited Roadster. Healthcare names such as Eli Lilly and gold miner Newmont also attracted buyers.
Gold, silver and bitcoin
Safe havens held up. Gold traded near $4,195 an ounce and silver near $57.90 in early trade. Bitcoin rose about 2% to roughly $81,765 on the day but was still heading for a second straight weekly loss.
What it means for investors
Friday's sell-off does not by itself mean the AI rally is over, but it shows that markets are now asking harder questions. Investors want proof that AI spending is turning into revenue and cash flow, not just bigger data centres funded by debt.
For Indian investors, the session is worth watching for two reasons. First, oil near $110 is a direct concern for India, which imports most of its crude. Second, global technology sentiment often spills over into Indian IT and semiconductor-linked stocks, which have just had a strong week at home.
What to watch next week
- Netflix third-quarter results on October 20
- Big Tech earnings later in the month, a key test of AI returns
- Nucor (October 26) and Twilio (October 29) results
- Moderna and Merck Phase 3 cancer vaccine data later in October
- Oil prices and any developments involving Iran
This article is for information only and is not investment advice. Sources: TheStreet, CNBC, Reuters.
