Chip stocks tumble as Wall Street asks whether the AI boom is a bubble

The Nasdaq posted its first weekly loss in five weeks and the S&P 500 its worst week since June. Micron, AMD, Broadcom and Intel fell 4–6%, CoreWeave dropped over 7%, Samsung 9% and SK hynix 11%. Hot US inflation — CPI at 3.7% in September and wholesale prices up 6.3% year-on-year — triggered the sell-off.

• Nasdaq fell for the first time in five weeks; S&P 500 had its worst week since June
• Intel lost about 6% on Friday alone, CoreWeave more than 7%
• Seoul's Kospi briefly halted trading after an 8% drop; Samsung fell 9%, SK hynix 11%
• IMF: an AI investment decline could cut global GDP by 0.4% by 2028