The DIY Investing Podcast

105 - Investing vs Speculation vs Gambling


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Mental Models discussed in this podcast:
  • Investing
  • Speculation
  • Gambling
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Show Outline

The full show notes for this episode are available at https://www.diyinvesting.org/Episode105

Definition of an Investment

An investment meets all 5 conditions:

  1. Utilizes a Margin of Safety
  2. Provides an Adequate Return (>10% for me)
  3. The 10% hurdle is met solely on a fundamental cash flow basis
  4. Is a Positive-Sum Game
  5. Bounded by a specific range of prices and terms

Any investment operation that fails to meet all five conditions is either speculation or gambling. 

Gambling is both a negative-sum game or an operation with a negative expected value. 

References
  • Based on this Twitter Thread I made:
    • https://twitter.com/TreyHenninger/status/1336004138061209604?s=20
  • Which was a rebuttal of this thread by @10kdiver:
    • https://twitter.com/10kdiver/status/1335267196625244162?s=20
  • Previous Podcast Episodes cited:
    • Episode 30 - GameStop Post-Mortem
    • Episode 95 - How to build conviction (FAQ)
      • Good source of discussion on Margin of Safety
    • Episode 23 - What's a good discount rate?
    • Episode 31 - Buying Stocks is not a zero-sum game
    • Episode 32 - Shorting Stocks is a negative-sum game
...more
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The DIY Investing PodcastBy Trey Henninger

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