The S&P 500 was nearly unchanged, but steep losses in Asian chip stocks showed how doubts about AI valuations and Chinese competition are reshaping market sentiment.
The U.S. market’s near-flat headline concealed a rougher session for technology shares abroad. SPY was down 0.06%, while global stocks edged lower and South Korea’s chip-heavy market plunged as investors reassessed the prospects and pricing of the artificial-intelligence trade.
The MSCI global-stock index fell 0.14%, according to Reuters. In Asia, the KOSPI closed down 5.5% at 6,035.35, AFP reported. Samsung lost 7.4%, SK Hynix fell 10%, and Japanese chipmaker Kioxia dropped more than 13%. The Nikkei 225 declined 1.8%. Those moves contrasted with the modest change in the U.S. benchmark, underscoring how concentrated the session’s losses were.
A key catalyst was concern that China’s ChangXin Memory Technologies is advancing quickly in memory chips. AFP reported CXMT is targeting a new server-memory product using its higher-density structure by the end of 2026. The prospect of a new competitor challenges established suppliers such as Samsung and SK Hynix, whose memory products have benefited from demand for AI infrastructure. Competition could reshape expectations for pricing and market share even if demand for computing capacity remains strong.
Sentiment also took a hit from Broadcom chief executive Hock Tan’s description of AI-sector flows as “casino gambling,” Reuters reported. Investors are questioning not whether AI is attracting investment, but whether companies will earn enough from it to justify current valuations. The IMF has warned that AI capabilities could be delivered with less investment than expected, or produce smaller economic gains than anticipated, raising the risk of an AI-related correction.
U.S. benchmarks were more restrained than Asian chip shares. Reuters reported Nasdaq futures down 0.5%, with Micron lower 2.5% before the open and Nvidia down 0.6%. Wall Street Journal market data showed the Dow up 0.38%, the S&P 500 down 0.06%, and the Nasdaq Composite lower 0.44%. The Russell 2000 fell 0.45%, while the VIX rose 0.72% to 15.32. The mix points to sector-specific pressure rather than a uniform retreat across U.S. stocks.
Government bonds attracted haven demand as equities weakened. Reuters reported the U.S. 10-year Treasury yield moved lower; Wall Street Journal data put it at 5.195%, down 4.2 basis points. Germany’s 10-year yield fell 4.1 basis points to 3.447%, according to the same data. Lower yields can ease borrowing costs at the margin, but they do not automatically bring down mortgage or auto-loan rates, which also reflect lenders’ terms, credit conditions and inflation expectations.
Oil remained a pressure point. Brent fell 1.9% to $104.58 a barrel in AFP’s October 13 snapshot, but stayed near a two-week high. Attacks on Saudi Arabia have kept supply concerns elevated, Reuters reported. For households, expensive crude can feed into gasoline and transportation costs and complicate efforts to curb inflation. The day’s decline offered some relief, but prices remain exposed to supply shocks.
The supplied reports did not provide a dependable account of currency moves, so the day’s foreign-exchange direction cannot be stated with confidence. The clearest signal for workers and savers is the divide between a nearly unchanged U.S. benchmark and a sharp repricing in Asian chip shares. Investors are testing whether AI investment can deliver durable returns, while Chinese competition and energy risks keep questions about profits and inflation in view.

