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)

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