Memory chip stocks fell as a sharp selloff in Seoul, where South Korea's Kospi led Asian markets lower, revived concerns about how long the AI spending boom can last. SK Hynix (SKHY) was down 4% at $137.03, SanDisk (SNDK) fell 3% to $1,336.86, and Micron (MU) eased 2% to $886.64. The Roundhill Memory ETF (DRAM) dropped 3% to $46.75, a steeper decline than the 0.5% fall in the Invesco QQQ Trust (QQQ), pointing to a memory-led selloff. Separately, a union at Micron's Taoyuan operation in Taiwan plans a strike later this week over employee bonuses and profit sharing, and SK Hynix's upcoming earnings report could show whether AI memory demand holds up.
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semiconductorsSouth KoreaSK HynixMicronAI investment
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Related tickers and likely impact
NVDA
▼ Likely negativeNvidia
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Semiconductors |
| Market cap | $5.2T |
| Close on 10/19/2026 | 217.09 |
| Change that session | +1.38% |
QQQ
▼ Likely negativeInvesco QQQ Trust
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/19/2026 | 718.36 |
| Change that session | +1.21% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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