'One definition of a bubble is a good idea that has gone too far. Awe of “American exceptionalism” in markets has now gone too far. Talk of bubbles in tech or AI, or in investment strategies focused on growth and momentum, obscures the mother of all bubbles in US markets.' https://www.ft.com/content/49cca8d7-7b6e-47e3-a50c-9557d7c85fc0