S&P Global to Launch its First AI-Powered Stock Index

S&P Global has launched the S&P 500 3AI Sector Rotator Index, marking a major leap for AI in mainstream finance. Partnering with UK fintech 3AI, S&P uses an explainable AI model to predict which sectors of the S&P 500 will outperform.
Each month, the AI analyzes massive datasets — from company fundamentals to macro trends — assigning an “Alpha Intelligence Score” to all 11 sectors. The index then automatically rotates into the top three sectors, equally weighted at 33.3% each.
This isn’t a passive tracker — it’s an AI-managed, forward-looking index that adapts in real time. It signals S&P’s confidence in machine learning as a financial tool and could pave the way for new ETFs that let investors literally “buy the AI.”