How concentrated are US market and economic gains in AI?
Core argument: A basket of 42 AI stocks accounts for 60%–80% of all S&P earnings growth, price returns and capital spending since January 2024, with AI primarily benefitting AI supply chain companies rather than the companies adopting it.
A basket of 42 AI stocks accounts for 60%-80% of all S&P earnings growth, price returns and capital spending since Jan 2024. At the same time, 60% of S&P 500 stocks are down 20% or more from their all-time highs despite the market being close to all-time highs. Only 30% of stocks are outperforming the S&P 500, one of the lowest figures since 1991. AI is primarily benefitting AI supply chain companies rather than the companies adopting it. The technology share of GDP growth has risen from almost zero to 2022 to ~33%. Only 20% of US states are growing faster than the national average, almost the lowest figure since 1979. AI accounts for the only positive trend in US construction spending, having risen by 38% since January 2024. Unfortunately the other three main categories are down since then (manufacturing -28%, commercial real estate -13% and residential -6%). That’s why the decline in planned data center projects is something to watch.

