The Chip Selloff Nears a Bear Market, and the Internals Tell a Sharper Story
Semiconductors have shed about $3.3 trillion since June. But the sector leader is holding, money is rotating rather than fleeing, and a new Chinese AI model is back in the frame.
The Philadelphia Semiconductor Index fell 4.3% on Thursday, breaking a widely watched technical level and closing less than 1% above the line that would mark a 20% drop from its June high, the threshold for a bear market. Global chip stocks have now erased roughly $3.3 trillion in market value since June 22. The selling accelerated Friday morning, with the Nasdaq down about 2% and steep overnight losses in Taiwan and Japan. The scale is real. The internals are more specific than the headline suggests.
The Breakdown Is Happening Despite Nvidia
The most telling detail is where the damage landed. Nvidia is nearly flat over the same stretch and remains the best-performing large-cap chip stock in the group. The pain has concentrated in memory, where Micron, Samsung, and SK Hynix had already fallen into a bear market, and in dozens of individual names down 20% or more from their June levels. A uniform collapse in demand for artificial-intelligence hardware would not spare the sector’s bellwether. This selloff has, which points less to a broken thesis than to a sorting: the market is separating the parts of the chip complex the buildout still needs from the stretched multiples and commoditized corners it can reprice without touching the leaders.
A Rotation, Not a Liquidation
Thursday was not an everything-down session. As chips fell, the equal-weighted S&P 500 rose, with gains in transports, regional banks, homebuilders, and several defensive sectors. Notably, investors did not pile back into the megacap technology names that had absorbed earlier rotations. That is the behavior of a market rearranging its leadership, not one fleeing risk altogether. The Friday acceleration complicates that read, and a failure to reclaim Thursday’s broken level would open more downside, but the distinction between rotation and liquidation still matters for how this resolves.
What Is Driving It
Two forces sit behind the move. The first is a growing debate over whether the enormous spending on the AI buildout can justify the valuations attached to some chipmakers. The second is a fresh catalyst: a new model from China’s Moonshot AI that claims to rival some U.S. systems, reviving a familiar worry that cheaper, more efficient models could soften demand for expensive silicon. Intel, Applied Materials, Corning, and AMD were among the hardest hit. Oil added to the risk-off tone, with Brent crude climbing above $86 on continued U.S.-Iran tensions.
The Small-Cap Reliability Layer
The PRISM Emerging Semiconductors Index, which tracks the smaller companies that test, burn in, and package AI chips before they reach the data center, fell about 3.4% Friday morning, a shallower move than the broad index. It remains roughly 36% above its January 2024 inception, though well below where it traded a week ago. These suppliers sit close to the reliability of the buildout itself, so their behavior is a useful gauge of whether this is a valuation reset or a demand crack. For now, a selloff that punishes memory and stretched multiples while leaving the clear leader flat reads more as repricing than abandonment. That could change quickly if the spending doubts harden into cuts.
The bear-market line is close, and the next few sessions will decide whether the sector reclaims the level it just lost. But a decline that spares the group’s leader and sends capital into other cyclicals is, for now, a market reranking rather than a verdict on AI demand. The clearer signal will come from the hyperscalers’ next updates on capital spending, which is what the whole chain, from Nvidia down to the smallest test-and-packaging name, ultimately depends on.
