[Close-up text of AI - artificial intelligence, machine learning concepts, and agentic AI technology.] MF3d/iStock via Getty Images A single investment theme is once again closing in on half the U.S. stock market. A JPMorgan basket of 41 companies tied to artificial intelligence now accounts for 49% of the S&P 500’s (SP500 [https://seekingalpha.com/symbol/SP500]) market value, a concentration not seen for one industry since the railroads dominated equities in the nineteenth century. The same group has generated about two-thirds of the benchmark’s gain in market capitalization this year. See the basket below: RANK STOCK PERCENTAGE OF S&P 500 1 Nvidia (NVDA [https://seekingalpha.com/symbol/NVDA]) 8.21% 2 Apple (AAPL [https://seekingalpha.
We show the main point publicly. Create a free account to continue reading the full article, save it, discuss it, and connect it with market and OSINT context.