The Dow Jones Industrial Average closed lower on October 13, 2026, ending a three-day winning streak as a selloff in semiconductor stocks dragged the broader market down with it. The blue-chip index slipped roughly 0.2% to 0.4%, a decline of approximately 137 to 180 points, while the S&P 500 and the Nasdaq Composite also edged lower.

The catalyst was an unusual one: the chief executive of one of the industry's leading companies publicly questioning the very AI trade that has powered his sector's gains.

Chip Stocks Lead the Decline

Semiconductor names led the retreat after Broadcom CEO Hock Tan likened AI investing to “casino gambling.” His remarks landed alongside reports that ChangXin Memory Technologies, a Chinese memory chipmaker known as CXMT, has advanced work on a new DRAM architecture. DRAM is the short-term memory that computers and AI servers rely on to process data quickly. A stronger Chinese competitor in memory could translate into greater supply and diminished pricing power for established manufacturers such as South Korea's Samsung Electronics and SK Hynix.

Micron Technology, the largest US memory maker, saw its shares fall approximately 4% to 6%. The weakness extended well beyond American markets, with memory and semiconductor stocks selling off globally. The Philadelphia Semiconductor Index (SOX), the benchmark for the chip sector, extended its losing streak to a fifth or sixth consecutive session—its longest run of declines in more than a year. Even so, the index remains up significantly year-to-date.

Earnings Season Opens on a Muted Note

The pullback came just as third-quarter earnings season kicked off. JPMorgan Chase, the largest US bank by assets and a traditional opener of each reporting season, reported mixed results that failed to lift sentiment or offset the weakness in technology shares.

The losses followed a strong prior session: on October 12, the Dow climbed 0.38% to close at 51,850.55, capping three straight days of gains. Treasury yields are hovering around 5.24%, a level that tends to weigh on high-valuation growth stocks by eroding the present value of their future earnings.

Rotation, Not Flight

The session showed signs of investors shifting money rather than fleeing the market outright. Capital moved out of growth and technology stocks and into value-oriented sectors such as energy and financials.

What It Means for Investors

The source of the skepticism may be the most significant signal. Criticism of the AI trade carries different weight when it comes from the CEO of a major chip company—someone with a direct view of customer spending and demand.

The CXMT development is potentially structural. Memory has historically been a boom-and-bust business in which pricing swings with supply, and a credible new competitor advancing DRAM technology could intensify competition and pricing pressure. That bears directly on companies like Micron, whose margins depend on memory prices holding up.

Key items to watch include whether the Philadelphia Semiconductor Index can break its losing streak, how Micron and other memory names respond to further news on Chinese competition, and what the next wave of third-quarter earnings reveals about AI spending. The chip sector remains well ahead for the year, but the mood surrounding it has clearly shifted from exuberance to scrutiny.