S&P 500 Closes at Record 7,580 as AI Concentration Pushes CAPE to 42.5

The S&P 500 reached a fresh record close of 7,580.06 on June 1, extending its 10% year-to-date gain through early June amid relentless AI-driven buying. The advance has been extremely narrow, with the top seven stocks now accounting for roughly 35% of index weight and AI-linked names nearly half of total market cap. Warnings from Michael Burry, Jamie Dimon and historical valuation signals have intensified as the Shiller CAPE ratio climbed to 42.5—levels unseen since the 2000 dot-com peak. Upcoming jobs data and Broadcom earnings this week are the next tests for momentum that history suggests is increasingly fragile.