Investors rushed into US Treasurys amid AI spending worries, driving yields down in one of their steepest one-day declines in more than a year, with the 10-year note below 5% and the 30-year at 5.3%. Chip stocks such as Nvidia and Broadcom sank despite benefiting from tech firms' plans to spend more on data centres, and Morningstar's Malik Ahmed Khan said investors are questioning the health of the entire AI ecosystem. Benchmarks in Hong Kong, Japan and South Korea slipped around 3%, and Europe's Stoxx 600 fell over 1%. Brent crude rose 3% to about US$113 a barrel, its highest since May, amid strikes in Saudi Arabia and around the Persian Gulf, while the average U.S. petrol price was US$4.27 a gallon, up 43% since the war began. Citadel's Ken Griffin said the market was “almost certainly” in a bubble, while Blackstone's Jon Gray described AI demand as “almost parabolic”.
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Related tickers and likely impact
QQQ
▼ Likely negativeInvesco QQQ Trust
Relevance: high
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/22/2026 | 704.59 |
| Change that session | -2.84% |
SPY
▼ Likely negativeSPDR S&P 500 ETF
Relevance: high
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/22/2026 | 764.02 |
| Change that session | -1.17% |
NVDA
▼ Likely negativeNvidia
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Semiconductors |
| Market cap | $5.2T |
| Close on 10/22/2026 | 212.28 |
| Change that session | -4.36% |
MSFT
▼ Likely negativeMicrosoft
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Systems Software |
| Market cap | $4.0T |
| Close on 10/22/2026 | 521.58 |
| Change that session | -2.13% |
VNINDEX
▼ Likely negativeRelevance: low
| Market | Vietnam stocks |
|---|---|
| Close on 10/22/2026 | 1,760.63 |
| Change that session | +1.26% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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