I recently gave a talk at the American Association of Individual Investors, and again at a Motley Fool gathering in Toronto. Below are the slides I used in the talks. (I removed a few that would have been too confusing without context.)

The theme of the talk is simple. Most investors underperfom a basic benchmark like the S&P 500 (SNPINDEX:^GSPC). To me, that fact has always emphasized two points: That markets and the economy work far differently than we assume, and figuring out what makes people bad investors is a more important topic than what makes a good investor. 


This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.