Back in 1944, journalist and playwright Mary Coyle Chase wrote the play “Harvey,” which ran on Broadway from 1944 until 1949 and then was adapted into a movie that starred Josephine Hull and James Stewart. The play won a Pulitzer Prize; Jimmy Stewart scored an Oscar nomination for Best Actor (but didn’t win), while Ms. Hull took home the Oscar for Best Supporting Actress. What this has to do with investing, we shall see. It starts with the phrase “cold beer at Akron,” which pops up in the following scene, where Elwood P. Dowd (Jimmy Stewart) has just explained...