IMHO these signals have more to do with the market than AI. They aren't finding AI to be have less ROI than before - they are requiring higher ROI than before, because there is less money remaining to be invested.
Managing the total amount of money so that investment bubbles peter out before they get excessively big is supposed to be the central bank's job.
Managing the total amount of money so that investment bubbles peter out before they get excessively big is supposed to be the central bank's job.