The Philadelphia Semiconductor Index fell more than 3% Friday morning — its third straight losing session — and crossed the line that gives this slide a name: down more than 20% from its mid-June peak. That is a bear market, by the standard definition, in the sector that carried the entire rally off the March lows.
The damage is global. Japan’s Nikkei 225 dropped 4% overnight as Asian chip names sold off first, and global semiconductor stocks have now erased roughly $3.3 trillion in market value since late June, by Yahoo Finance’s count. The U.S. tape followed the chips down: the Dow lost about 1%, the S&P 500 slipped 0.8%, and the Nasdaq shed 1.6%, with all three on track for weekly losses. Netflix piled on, extending Thursday’s after-hours drop to fall more than 9% at the open after its soft third-quarter revenue forecast.
Here is what makes this bear market strange: it arrived during some of the best fundamental news the sector has ever printed. TSMC grew profit 77% this week and raised its capex plan to $60–64 billion. ASML raised its full-year outlook by €6 billion. Both sold off anyway. Friday’s early damage ran straight through the complex — Applied Materials and Lam Research off roughly 5%, Broadcom, Micron, Intel, Arm and AMD down in the 4–5% range, Nvidia around 3% lower.
What changed is not demand. It is the story investors tell about demand. Meta’s plan to resell surplus AI compute raised the possibility that hyperscaler orders double-count real need. Intel’s 18A yield timeline slipped. Memory names were already in their own bear market a week ago. And Friday morning’s Kimi K3 release was one more reminder that frontier-grade AI keeps getting cheaper — great for adoption, murkier for the assumption that chip buyers must spend infinitely, forever.
Our take: when record earnings can’t stop a 20% drawdown, the market isn’t repricing this year’s profits — it’s repricing the multiple it will pay for cyclical AI capex. That’s healthier than it feels. The dangerous version of this correction would be demand actually cracking; instead, TSMC and ASML just told you the checks are still being written. The uncomfortable part: as one widely shared Friday headline put it, $3.3 trillion into the slide, “no one is short.” Corrections nobody is positioned for tend to run further than fundamentals say they should.
What to watch
- Today’s SOX close. Intraday bear markets only count if they close there. A late reclaim of the 20% line turns this into a headline, not a regime.
- Whether Netflix’s whiff spreads. A guide-down plus a 9% drop in one of the market’s steadiest growth names tests how much patience is left for any expensive story.
- Big Tech earnings. The next round of hyperscaler capex numbers either re-anchors the demand story or confirms the market’s new skepticism.
- Consumer sentiment. Friday’s University of Michigan read lands on a market suddenly looking for reasons to de-risk.