How AI is creating a lopsided US economy

An ABC News analysis explains how AI-related companies dominate the S&P 500, with tech stocks accounting for about 44 per cent of total market value and six companies — Meta, Microsoft, Apple, Micron, Nvidia and AMD — driving 57 per cent of the index's gains since April. Experts warn that market concentration near 39 per cent for the top 10 stocks, circular financing between AI firms, and heavy spending by AI labs that outpaces their revenue create risks for everyday investors.