The top five members of the S&P 500 command nearly 30% of market share, a record high for any point over the past 50 years.

ChatGPT, Gemini and Claude are extraordinary feats of engineering, but they don’t represent sustainable AI.

“AI better deliver for the U.S., or its economy and markets will lose the one leg they are now standing on,” warns Ruchir Sharma of Rockefeller International.