Artificial-intelligence evangelists such as Sam Altman want to reshape the world, but they need mountains of money to do it. That is sparking a modern-day gold rush on Wall Street.
The FTSE 100 index closed up 27.08 points, 0.3%, at 8,673.96. The FTSE 250 ended up 145.41 points, 0.7%, at 20,950.48, and the AIM All-Share closed down 0.10 points at 718.13.