Cybersecurity stocks were the top performers in the S&P 500 on Monday amid escalating AI fears; CrowdStrike rose 14%, Palo Alto Networks 13%, and Fortinet 9% (Britney Nguyen/MarketWatch)

TechmemeSeptember 15, 2026en

Britney Nguyen / MarketWatch : Cybersecurity stocks were the top performers in the S&P 500 on Monday amid escalating AI fears; CrowdStrike rose 14%, Palo Alto Networks 13%, and Fortinet 9% — The software sector outperformed the chip sector to a historic degree in the face of escalating AI fears

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