AI-related stocks now reflect a record 45% of the S&P 500's market cap.

Shocking stat of the day:

AI-related stocks now reflect a record 45% of the S&P 500's market cap.

This percentage has surged +20 points since November 2022, when ChatGPT was launched.

Furthermore, a record 15.4% of investment-grade debt is now tied to AI, making it the largest… pic.twitter.com/F8UEg5urT7

— The Kobeissi Letter (@KobeissiLetter) April 24, 2026