AI 'Casino' Warnings and Chinese DRAM Breakthrough Spark Global Chip Stock Rout

Broadcom CEO Hock Tan warned that many AI investors lack understanding of the sector and likened their behavior to casino gambling, remarks that amplified existing concerns over capital intensity and returns. Speaking at a Singapore conference, Tan highlighted unrealistic expectations and questioned enterprise spending efficiency, drawing parallels to arcade token waste. These comments coincided with news from China's ChangXin Memory Technologies (CXMT) on progress toward denser 4F2 DRAM designs for server memory, raising fears of heightened competition for Korean giants Samsung and SK Hynix. South Korea's Kospi index plunged as much as 7%, with Samsung and SK Hynix shares dropping sharply. The selloff rippled to U.S. futures, pressuring Nasdaq and memory names like Micron while S&P 500 futures held relatively flat. Separately, JPMorgan's Q3 results showed a rare profit miss driven by fixed-income, currencies and commodities (FICC) trading revenue of $5.37 billion against $6 billion estimates, though the bank raised its full-year net interest income guidance. Treasury yields eased amid flight-to-safety flows, and commodities including oil declined. Multiple mainstream outlets confirmed the sequence of events and market reactions.