Talking Billions with Bogumil Baranowski

100 Year Thinkers, Ep. 6 | Chris Mayer & Robert Hagstrom: Most Stocks Don’t Matter & The Outliers That Break Base Rates

Mar 28, 2026
Robert Hagstrom, investment author and CIO known for studying Buffett's methods. Chris Mayer, investor and author famed for researching 100-baggers and outlier returns. They discuss why a tiny number of stocks drive most market gains. They debate base rates versus extreme outcomes, when to trust historical probabilities, durable moats, winner-take-all dynamics, and how AI and changing economics challenge conventional assumptions.
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INSIGHT

Start With Base Rates Then Demand Strong Evidence

  • Start analysis with base rates but require strong justification to assume divergence.
  • Robert Hagstrom: Buffett studies long operating histories because enduring performance through shocks suggests future durability.
INSIGHT

AI Breaks Traditional Base Rate Certainty

  • AI forces investors to re-evaluate historical base rates because terminal values are uncertain.
  • Both Chris Mayer and Robert Hagstrom said software valuations fell as markets debated AI's impact on long-term revenue and residual value.
ADVICE

Do Inside-View Work Before Betting Against Base Rates

  • Do deep inside-view work to identify durable competitive advantages when you diverge from base rates.
  • Chris Mayer spends time researching moats and why a company's high returns on capital are hard to replicate before betting on it.
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