Too Few Stocks Control the S&P 500’s Future

Published on July 16, 2026

Is it a bubble or isn’t it? That’s what everyone seems to be asking about the US stock market. I say it isn’t. A bubble to me is when price becomes disconnected from any rational, articulable value, the way people chased opaque schemes in the Roaring 1920s or the blind faith in new internet companies in the 1990s.