London | Among the many challenges to making money out of markets right now, one stands out for Michael Hintze. It’s not the Trump administration’s tariff acrobatics. Nor is it some geopolitical conflict, near or far. The billionaire hedge fund manager is preoccupied by the rise of machines, and the ebb of human reason.

It has been a year since the London-based Australian investor sold CQS, the manager of $25 billion he founded in 1999, to Canadian giant Manulife Investment Management and struck out once again on his own.