The better the investor, the simpler the questions. When I started, I was obsessed with jargon, complex questions and spreadsheets. Now I ask things like “what does it do?”, “why do people buy it?”, and “why are you selling?”. And I never do more math than I can fit on a napkin.
Michael Mauboussin — How Great Investors Make Decisions, Harnessing The Wisdom (vs. Madness) of Crowds, Lessons from Race Horses, and More (#659) - The Blog of Author Tim Ferriss