Stocks fell again this week as investors doubted the durability of the AI boom after mixed quarterly earnings. Alphabet's cash flow deepened into negative territory in the third quarter as it joined Meta and Amazon in ramping up spending, and its shares fell about 12% on Thursday, their worst day on record. Microsoft reported strong cloud growth but said capital spending will accelerate, and SK Hynix beat earnings forecasts; some on Wall Street see investors sorting AI winners from losers rather than abandoning the sector. Ed Yardeni cites financial, physical and political constraints that could push stocks lower if they worsen, though he sees them as healthy for the boom's durability. Hyperscalers are projected to invest nearly $800 billion this year and $1 trillion annually from 2027 through 2030, while neoclouds with weaker balance sheets have seen borrowing costs soar.
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AI investmentartificial intelligenceMSFTNVDA
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Related tickers and likely impact
MSFT
▲ Likely positiveMicrosoft
Relevance: low
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Systems Software |
| Market cap | $3.9T |
| Close on 10/29/2026 | 530.14 |
| Change that session | -0.16% |
NVDA
▲ Likely positiveNvidia
Relevance: low
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Semiconductors |
| Market cap | $5.1T |
| Close on 10/29/2026 | 213.66 |
| Change that session | -0.80% |
QQQ
• NeutralInvesco QQQ Trust
Relevance: low
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/29/2026 | 715.34 |
| Change that session | -1.42% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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