A supply-chain comment on Lam Research's earnings call set off Thursday's chip sell-off

The Nasdaq-100 closed down 2.90% Thursday, and at the index level it read like another broad risk-off night. Break it apart by sector and the picture changes: semiconductor equipment and AI-infrastructure names took the hit, while staples, healthcare, industrials, and enterprise software mostly finished green. The decline traces back to one sentence on an earnings call.

The trigger: a supply chain comment, not a miss

Lam Research (LRCX) reported Wednesday after the close, and the quarter itself was clean. Revenue hit a record $8.22 billion against a roughly $8.13 billion estimate. Gross margin and operating margin both set company records. EPS beat consensus. None of that is what moved the stock.

On the call, CFO Doug Bettinger said the December-quarter guide "would have been a bit higher if not for some near-term supply chain constraints that we are actively managing." That single line is what Thursday's session priced. Investors read it as a warning that supply limits could cap chip output well beyond Lam itself, and the stock fell 11.8% in the regular session that followed, our tracked data shows, erasing the earnings beat entirely.

The read-through hit the whole equipment chain

The market treated Bettinger's comment as a signal for the whole equipment chain rather than one company's issue, and Applied Materials and ASML fell with it. Across our tracked universe Thursday: Astera Labs (ALAB) -11.1%, Teradyne (TER) -10.6%, CoreWeave (CRWV) -10.1%, KLA (KLAC) -9.6%, Monolithic Power (MPWR) -9.0%, Marvell (MRVL) -8.7%, SanDisk (SNDK) -8.5%, Applied Materials (AMAT) -8.2%, AMD -8.1%, Intel -8.0%, Seagate (STX) -7.9%, Arm (ARM) -7.3%, ASML -6.9%, Western Digital (WDC) -6.4%, Synopsys (SNPS) -6.4%, and Micron (MU) -6.3%.

That list spans equipment makers, memory, foundational chip-design software, and AI-infrastructure plays that have nothing to do with wafer fab tools. A single remark about component availability doesn't explain all of it on its own. Coverage of the session also pointed to a second thread feeding the same move: renewed worry about AI capital spending, after a separate capital-cost warning from Broadcom's CEO hit custom AI chip names even harder than the broader group. The semiconductor sector ETF (SOXX) closed down nearly 7% for the day.

Everything outside chips was mostly fine

That's the part the index-level number hides. Grouped by sector, the rest of the Nasdaq-100 wasn't selling off at all Thursday: Consumer Staples averaged +2.8%, Health Care +1.8%, Industrials +1.6%. Inside the Technology bucket itself, the enterprise-software names moved the opposite direction from the chip names: Roper (ROP) +9.7%, Adobe (ADBE) +6.1%, Intuit (INTU) +5.8%, Autodesk (ADSK) +4.1%, alongside non-tech gainers CSX +6.8%, Paychex (PAYX) +5.6%, and ADP +4.6%.

Money rotated out of chip equipment and the names most levered to the AI buildout, and into the parts of the index with the least exposure to that story, rather than leaving the market altogether.

What to watch from here

Lam's own guidance for wafer-fab-equipment spending still calls for the 2027 market to top $200 billion, and CEO Tim Archer has said the current supply constraint looks nothing like the COVID-era shortages and should resolve faster. If that holds, Thursday reads as a sentiment-driven overreaction to one line in a call, not a change in the underlying demand picture. Every name above is in AI007 with the same feed we used to write this, so you can watch whether the rest of the chip-equipment chain confirms or reverses that supply concern as more of the sector reports.