Cybersecurity stocks fell sharply in afternoon trading as concerns about how AI spending is funded spread across technology: Palo Alto Networks dropped 7% to $343.31, SentinelOne fell 9% to $21.29, and Zscaler lost 6% to $206.39. The First Trust NASDAQ Cybersecurity ETF (CIBR) fell 4% and the Invesco QQQ Trust (QQQ) fell 1.72%, so the sector is falling harder than large-cap tech. The pullback reverses record highs set earlier this month, even though Citi raised its price target on Palo Alto and kept a Buy rating, citing improving security spending as companies deploy AI. Palo Alto's fiscal Q4 2026 revenue rose 34.5% to $3.41 billion, and its Next-Generation Security ARR jumped 63% to $9.1 billion.
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Related tickers and likely impact
QQQ
▼ Likely negativeInvesco QQQ Trust
Relevance: low
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/15/2026 | 728.00 |
| Change that session | -0.13% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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