Charlie Munger said he learned one of his most enduring investing lessons long before Wall Street ever heard his name and that was that very talented people can still behave in wildly irrational ways. Munger’s Lifelong Quest To Diagnose Stupidity Speaking at the Daily Journal Corp. annual meeting in 2019, the then–Berkshire Hathaway Inc. (NYSE:BRK) (NYSE:BRK) vice chairman told shareholders that as a boy, "I could see some of the adults around me were nuts — yet they were very talented. I could see how muc ...