Alphabet's shares fell more than 13%, erasing over $500 billion in value in the company's biggest-ever market plunge, after disappointing search and advertising sales fueled investor concerns that AI threatens its core business. Commentators noted that Google's 25% top-line growth is impressive, but much of it comes from cloud, no segment matches the margins of traditional search, and search ad growth was about half of Meta's. They argued the stock could be re-rated upward again if Google releases a strong new model, as it did before. The discussion also covered a potential all-stock Marvell and Lumentum deal valued close to $100 billion, with Lumentum up 150% this year, and DoorDash's purchase of Instacart.
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GOOGLartificial intelligenceearningsadvertising
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Related tickers and likely impact
GOOGL
▼ Likely negativeAlphabet Inc. (Class A)
Relevance: high
| Market | US stocks |
|---|---|
| Sector | Communication Services |
| Industry | Interactive Media & Services |
| Market cap | $4.0T |
| Close on 10/28/2026 | 325.61 |
| Change that session | +1.57% |
QQQ
▼ Likely negativeInvesco QQQ Trust
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/28/2026 | 725.59 |
| Change that session | +0.60% |
SPY
▼ Likely negativeSPDR S&P 500 ETF
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/28/2026 | 772.35 |
| Change that session | +0.35% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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