Chip stocks fell after a supply warning from Lam Research (LRCX), a maker of chipmaking equipment, deepened an AI-driven selloff across the semiconductor sector. Marvell (MRVL) dropped 8% to $224.64, AMD fell 8% to $509.79 and Intel (INTC) slid 7% to $86.64, while the iShares Semiconductor ETF (SOXX) declined 6% and the Invesco QQQ Trust (QQQ) fell only 2%. On its October 21 earnings call, Lam CFO Doug Bettinger said revenue guidance would have been higher without near-term supply chain constraints, and CEO Tim Archer said clean room space and component limits would keep restricting chipmakers' ability to meet end demand into calendar year 2027. Archer argued the current tightness is nothing like COVID-era shortages, while Bettinger expects shipments that slip out of the December quarter to go out in the March quarter.
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Related tickers and likely impact
QQQ
▼ Likely negativeInvesco QQQ Trust
Relevance: high
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/21/2026 | 725.20 |
| Change that session | +1.05% |
NVDA
▼ Likely negativeNvidia
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Semiconductors |
| Market cap | $5.2T |
| Close on 10/21/2026 | 221.97 |
| Change that session | +2.54% |
SPY
▼ Likely negativeSPDR S&P 500 ETF
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/21/2026 | 773.09 |
| Change that session | +0.53% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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