Technology stocks fell on three continents within roughly a day. Nasdaq futures were down 1.1% shortly after 6:30 a.m. Eastern on Thursday, October 15, according to CNN’s business coverage, a day after the Nasdaq posted its worst decline since July. The selling followed a strong U.S. inflation report that arrived with markets already uneasy about how much money is flowing into artificial intelligence.

The damage, market by market

  • South Korea: the Kospi finished 7.6% lower, enough to trigger a circuit breaker. SK Hynix fell 11% and Samsung Electronics 9.5%.
  • Japan and Hong Kong: the Nikkei closed 4.9% lower and the Hang Seng 1% lower.
  • Taiwan: the technology index dropped 3.5%, and TSMC finished 2% lower despite strong earnings.
  • Europe: the technology index was down 3% in early afternoon trading, with ASML off nearly 5%.
  • United States: CoreWeave fell 15.5% on Wednesday and was down another 6% before the open Thursday. Oracle closed nearly 9% lower Wednesday and was down more than 2% premarket.

The reasoning behind the sell-off

CNN’s account points to rates first. A strong U.S. inflation report raised fears that higher interest rates would make AI investment more expensive, and many AI companies already carry heavy debt. Layered on top were worries about spending levels, high valuations and slower-than-expected earnings growth at leading U.S. AI labs, with reports pointing to slowing revenue growth at some of them.

Two chip-industry items added to the pressure. TSMC chief executive C.C. Wei described caution on demand, citing rising component prices and macroeconomic uncertainty. And China’s CXMT announced progress on advanced memory chips, which raised doubts about the profitability of U.S. and South Korean rivals.

What analysts said

Neil Wilson, a strategist at Saxo, said worries about inflation and bubbly valuations had sent investors “running for the covers.” Mohit Kumar, chief European economist at Jefferies, warned that a slowdown in AI infrastructure spending would mean sharply lower U.S. growth expectations, though he expects upcoming earnings to show that demand remains robust.

Why interest rates and data centers are linked

This section is general background rather than reporting from CNN. Building AI data centers takes enormous amounts of capital, and much of it is raised through debt or from investors who expect returns years from now. When rates rise, borrowing costs more, and profits expected in the distant future are worth less in today’s terms. Companies whose valuations lean on far-off earnings therefore tend to react sharply when inflation data suggests rates will stay high.

The Associated Press adds a feedback loop to that picture. In its report on the same inflation data, it cited an estimate from Goldman Sachs that the AI buildout has added about half a percentage point to the annual inflation rate, measured by the Fed’s preferred gauge. Higher inflation can mean higher rates, and higher rates raise the cost of the very buildout that helped lift prices. That chain is a reading of the two reports side by side, not a claim either one makes.

Reading the numbers

Percentages stack in ways that are easy to misjudge. CoreWeave’s 15.5% drop on Wednesday followed by a 6% fall in premarket trading would, if it held through the open, leave the stock roughly 21% below Tuesday’s close. Oracle’s near-9% slide plus a premarket decline of more than 2% points to something around 11%. That is simple arithmetic on CNN’s figures, and premarket prices often change by the time regular trading begins.

Why memory chips sit near the center

Some of the sharpest Asian moves came in memory makers: SK Hynix and Samsung Electronics fell hardest, and the CXMT announcement targeted the same corner of the industry. As general background, AI accelerators depend on large amounts of fast memory, which ties memory suppliers closely to AI capital spending. Their shares can therefore swing harder than the broader market when investors reassess how long the buildout will last. This is context rather than reporting from CNN.

What a circuit breaker does

The Kospi’s drop triggered a circuit breaker, a mechanism exchanges use to pause trading after a steep fall and give participants time to absorb information. CNN’s report does not say how long the pause lasted, so none is assumed here.

What remains unknown

A one-day move, even a violent one, does not settle whether the AI spending boom is faltering. CNN’s report notes that earnings are still to come, and Kumar expects them to hold up. The AP reported that most Wall Street investors expect the Federal Reserve to hold rates at its October 27-28 meeting and possibly raise them in December, a decision that could matter more to heavily indebted AI builders than any single day of trading.

This post reports market moves and analyst views. It is not investment advice.

Sources: CNN Business, via KESQ; Associated Press, via PBS NewsHour.