Artificial intelligence now accounts for a record 45% of the S&P 500’s total market capitalization, according to recent analysis. This represents a surge of 20 percentage points since the launch of ChatGPT in November 2022. Furthermore, AI now ties to a record 15.4% of investment-grade debt in the U.S. credit market, with related debt reaching $1.4 trillion.
Artificial intelligence has become a dominant force in global financial markets. Data shows AI-related stocks now hold 45% of the S&P 500’s market cap.
The share has risen 20 points since late 2022 when ChatGPT was launched. A record 15.4% of investment-grade corporate debt is now linked to AI technologies.
That percentage has increased by 3.5 points since the year 2020. AI-linked debt has nearly doubled in that period to an all-time high of $1.4 trillion.
“Never before has a single theme dominated both US equity and credit markets to this magnitude,” stated the report. This illustrates the profound market shift toward artificial intelligence as a core investment sector.
Adoption is also surging within the American workforce. A separate survey cited in the analysis indicates 50% of employed U.S. adults used AI in their role in early 2026.
That figure is up from 46% in the previous quarter and has more than doubled over three years. These metrics collectively signal AI’s deepening integration into economic and professional systems.
