Semiconductor stocks fell on Tuesday after Broadcom's CEO compared many AI investors to "casino" gamblers and Chinese memory chip maker CXMT claimed good progress on a new chip architecture. South Korea's Kospi index tumbled 6.25%, Japan's Nikkei fell 1.8%, and Taiwan's exchange lost nearly 2%, with TSMC shares down by a similar amount.
SynthePulse Insight · AI deep reading
Version 1 · 1 source
On October 13, 2026, Asian semiconductor stocks suffered a sharp selloff: South Korea's Kospi index plunged 6.25%, SK Hynix fell 10%, and Samsung Electronics dropped 7.4%. The direct triggers came from two pieces of news—Broadcom CEO Hock Tan likening many AI investors to 'casino' gamblers, and China's ChangXin Memory Technologies (CXMT) claiming good progress on a new DRAM architecture. But the report did not provide a quantitative attribution of each one's impact; behind the market panic is the compounding of concerns over debt-financed AI infrastructure and the possibility that the memory chip competitive landscape may be shifting.
On Tuesday, October 13, 2026, shares of Asian semiconductor companies fell sharply. According to The Guardian, there were two direct triggers for this decline: Broadcom CEO Hock Tan likening many AI investors to 'casino' gamblers, and Chinese memory chipmaker CXMT saying it had made good progress on a new chip architecture.
South Korea's benchmark Kospi index plunged 6.25% as investors sold off chip stocks. Japan's Nikkei fell 1.8%, the Taiwan exchange fell nearly 2%, and TSMC fell by a similar margin. Samsung Electronics shares fell 7.4% on the Korean exchange, and memory chipmaker SK Hynix dropped 10%. Japanese chip equipment maker Tokyo Electron fell 7.15%, and OpenAI investor SoftBank Group dropped 8.5%.
U.S. chipmaker Micron Technology slid 3.9%, while Nvidia, AMD and Broadcom also fell; the previous day, the tech-heavy Nasdaq Composite slipped 0.4%. The report said U.S. stock index futures pointed to a mixed open on Wall Street.
Speaking at a conference in Singapore, Tan said many investors have no idea what they're investing in. According to Bloomberg, he said these investors 'set extremely extreme expectations, and it turns out it's almost like being in a casino.'
Tan also discussed OpenAI's financial situation. He said OpenAI's annualized revenue as of the end of September was $50 billion (£38 billion), which shows its business model is viable but offers almost no guarantee of long-term profitability. He said OpenAI is still losing money because it invests enormously in training, so at this stage it says nothing beyond indicating that providing frontier generative AI models has substantial potential revenue growth.
Tan pointed out that a considerable portion of AI lab companies' revenue comes from pilot projects. He likened it to a child going to an arcade, where parents give $10 in tokens, which are spent in 10 minutes, and nothing is learned. It should be noted that the above statements about OpenAI's revenue and losses are Tan's personal claims, not official OpenAI disclosures.
According to a Monday report by the South China Morning Post, CXMT made good progress on a new DRAM architecture that will increase memory density. CXMT listed on the Shanghai stock market at the end of July with a strong first-day performance, and produces DRAM chips that other AI chips draw data from during computation.
Investors worry that CXMT could challenge the world's largest memory chipmakers Samsung, SK Hynix and Micron. Chris Beauchamp, chief market analyst at investment trading platform IG, said the chip stock plunge looks set to continue, again attributed to news from China, and CXMT's new progress reminds investors of the enormous competition in the industry.
Beauchamp also commented that this is good for customers who can enjoy technological improvements and falling margins, but dangerous for high-flying tech stocks that have promised too much and on whose performance the entire stock market rally seems to depend. However, the report only cites the South China Morning Post's news about CXMT's progress, and does not provide the original text of an official CXMT statement or technical details, nor does it specify the new DRAM architecture's specific technical parameters, mass production timeline or customers.
In recent months AI stocks have been on a roller coaster, driven by concerns that companies are pouring enormous amounts of debt-financed money into AI infrastructure. This concern forms the macro backdrop for this round of chip stock selling.
Judging from the report, CXMT's progress news and the Broadcom CEO's 'casino' remarks together constitute the direct triggers for this round of chip stock selling, but the report does not provide a quantitative attribution of each one's impact. Therefore, it is impossible to determine which piece of news contributed more to the market decline.
In addition, the report does not mention any regulatory agency or third party verification of CXMT's technological progress. The actual performance improvement and mass production timeline of CXMT's new DRAM architecture remain unclear, and whether it can truly challenge the market positions of Samsung, SK Hynix and Micron also remains uncertain.
Whether the chip stock selloff will continue—the report only cites an analyst's view that it 'looks set to continue.' The actual degree of impact of the Broadcom CEO's remarks on the market cannot be quantified from the report. There is still no specific data on the scale of AI infrastructure debt financing and its potential financial stability risks.
OpenAI's long-term profitability remains unclear; Tan only said its revenue growth potential is large. The technical details, mass production timeline and customers of CXMT's new DRAM architecture have not been disclosed, and its market impact remains to be further observed.
This article is based on a report by The Guardian on October 13, 2026. The market index and individual stock declines are facts confirmed by the report; Broadcom CEO Hock Tan's statements about OpenAI's $50 billion annualized revenue, its loss-making status and AI lab pilot revenue are his personal remarks, not official OpenAI disclosures, and are labeled in this article as source_claim; CXMT's progress is cited from the South China Morning Post, and the report does not provide the original text of an official statement or technical details, nor is there third-party verification. The report does not provide a quantitative attribution of the respective impacts of the CXMT news and Tan's remarks, and the related judgments are inferences.
The single-day plunge in Asian chip stocks is the result of two pieces of news compounding with deeper debt concerns: the Broadcom CEO's 'casino' warning shook the AI investment narrative, while CXMT's DRAM progress reminded the market that the memory chip competitive landscape may be shifting. But the respective impacts of the two cannot be quantified, and significant uncertainty remains regarding both the actual significance of CXMT's technological progress and OpenAI's long-term profitability.
Secondary coverage
This article also covers this event; its overall headline is not the event headline.