Goldman Sachs: AI-related companies account for 40% of S&P 500 market cap

Goldman Sachs estimates that AI infrastructure-related companies now represent approximately 40% of the total market capitalization of the S&P 500. Data from Apollo indicates that AI-related issuances account for nearly half of investment-grade bond issuances this year and 87% of venture capital funding. Institutional investors are increasingly concerned about market concentration risks, with many re-evaluating their portfolio exposure to AI as traditional asset diversification strategies are challenged.