Cue the classic joke: A finance professor is walking across the University of Chicago campus with a student. They come upon $20 lying on the ground, and the st

Cue the classic joke: A finance professor is walking across the University of Chicago campus with a student. They come upon $20 lying on the ground, and the student leans down to pick it up. The professor said, “Don’t bother. If it was really there, somebody else would’ve already picked it up.”