Chip stocks shift from safe AI play to the market’s pain trade

For much of the AI boom, the playbook was simple: buy chips, make money. Semiconductors were the shovels in the AI gold rush, and investors treated them accordingly. That trade has now flipped on its head. The unraveling The cracks started showing in June, when the Nasdaq dropped more than 4% in a single session. That day was particularly unkind to semiconductor names. Micron, Intel, Super Micro, and Sandisk each cratered more than 11%. July made June look like a warmup. The Philadelphia Semiconductor Index logged its worst week in over a year, and the broader semiconductor-versus-software ratio posted one of its ugliest monthly performances in over two decades. Then came September 14, when a group of prominent AI industry leaders publicly called for a slowdown in AI model development, citing safety risks. The market’s response was swift and predictable: Intel, Micron, and AMD all dropped between 5% and 8% on the day. Strong earnings, weak sentiment What makes this sell-off particularly disorienting is that it hasn’t been driven by collapsing fundamentals. Micron, for instance, continued to post exceptional earnings growth through mid-2026. Demand for high-bandwidth memory and AI a...