AI optimism hit a hard patch. Chip stocks and Asian markets fell on Tuesday 13 October 2026 as investors weighed warnings about AI spending against progress in chip architecture. Hock Tan, the CEO of Broadcom, compared many AI investors to gamblers in a casino, giving an already nervous semiconductor market another reason to sell.
“A lot of investors have no clue what they are investing in,” Tan said. He added that investors had “set very extreme expectations only to find out that it’s almost like they are in a casino.”
The comments landed alongside fresh news from CXMT, the Chinese memory chip maker, which said it had made good progress on a new DRAM architecture. The design would boost chip memory density, adding a competing development to a market already focused on AI-related demand and the companies supplying memory and chip equipment.
South Korea took the hardest hit among the major Asian markets. The benchmark Kospi tumbled 6.25%, extending its second-half slide, after falling more than 7% intraday to its lowest level since July 31.
Samsung Electronics shares dropped 7.4%, with the stock falling 9% at one point. SK Hynix was down 10%, matching the 10% decline recorded during the session. Two of South Korea’s largest semiconductor companies were therefore caught in the same market retreat, because apparently one warning about overheated expectations was not enough.
Japan’s Nikkei fell 1.8%, while the Taiwan exchange lost almost 2%. Separate figures put both Japan’s Nikkei and Taiwan’s Taiex around 3% lower during the session, showing how quickly the declines widened before the market settled at different levels.
Tokyo Electron, the Japanese chip equipment maker, fell 7.15%. SoftBank Group lost 8.5%, adding another large Japanese company to the list of firms hit during the technology sell-off.
Memory architecture meets AI expectations
CXMT’s progress matters because the company is working on DRAM architecture that would boost chip memory density. The development arrived as investors questioned the scale of AI investment and the expectations attached to companies linked to the build-out.
The market did not treat the architecture update as a separate technical detail. Chip stocks fell after Tan’s comments, while CXMT’s progress placed memory technology and AI investment in the same trading story.
Broadcom’s CEO did not say that AI investment had stopped. His warning focused on investors who lack a clear understanding of what they are buying and set expectations that the results may not support. Markets, as ever, prefer certainty — especially the kind that can be expressed in a rising share price.
The Nasdaq slipped 0.4%, and Micron Technology slid 3.9%. The moves extended the pressure from Asian semiconductor stocks into US-listed chip companies, even as the wider US market pointed to a mixed open.
US futures signal a divided market
Futures for the S&P 500 fell 0.1%, while futures for the Dow Jones Industrial Average inched up 0.1%. Nasdaq futures tumbled 0.6%, placing technology shares on weaker footing before trading began.
JPMorgan Chase shares ticked up 1.4%, offering one of the few gains among the named companies. Oil prices fell around 2%, adding another decline to a session already dominated by falling technology and semiconductor stocks.
The figures show a market struggling to separate real technical progress from the expectations surrounding AI investment. CXMT reported progress on denser DRAM architecture, but semiconductor shares still fell across South Korea, Japan, Taiwan and the US.
For chip investors, the message was blunt: AI remains a powerful market theme, but enthusiasm does not guarantee returns. Tan’s casino comparison gave that old warning a new soundtrack, while the Kospi’s second-half slide supplied the numbers.
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