The possibility that stock value in aggregate can become irrationally high is contrary to the hard-form "efficient market" theory that many of you once learned as gospel from your mistaken professors of yore. Your mistaken professors were too much influenced by "rational man" models of human behavior from economics and too little by "foolish man" models from psychology and real-world experience.
Charlie MungerThere are exceptional loyalties and there are old fashion ideas about how you get loyalties, and after all the auditorium is full of people who have co-owned shares with the managers for many decades, and in many cases they co-invested when everyone was young and obscure. Also when you come back to a place like that you are celebrating old loyalties, and of course the basic idea behind so much of Berkshire is the old fashioned idea that the best way to get loyalty is to deserve loyalty.
Charlie Munger