Information Disadvantage Paradox

Shaan Puri and Sam Parr discuss a fascinating experiment that challenges the common belief that having advance information (like tomorrow's news) would lead to better investment returns. The experiment and real-world examples suggest that having advance information can actually lead to worse outcomes due to human behavior and poor decision-making.

Key Points:

• Experiment Setup:

  • Participants given historical Wall Street Journal front pages
  • Could trade S&P 500 or 30-year treasury
  • 15-day trading period with real market events
  • Allowed leverage up to 20x

• Surprising Results:

  • Half of participants lost money despite having advance information
  • One in six traders went completely bust
  • Average gain was only 3% for regular traders
  • Correct directional predictions only 51% of the time (same as coin flip)

• Professional Trader Performance:

  • Elite traders (hedge fund managers, top bank traders) did significantly better
  • Averaged 130% gains
  • Only 6% better at predicting direction (57% vs 51%)
  • Key differences:
    • Skipped 1/3 of trading opportunities
    • Better bet sizing
    • Never risked too much of their bankroll
    • Properly managed leverage

• Key Insights:

  • Information alone doesn't provide an edge
  • Proper bet sizing matters more than predictive ability
  • Small edges (6-10% better prediction) can yield massive results with proper execution
  • Most people overestimate the value of information
  • Ray Dalio quote: "He who lives by the crystal ball will die eating shattered glass"

• Nassim Taleb's Conclusion:

  • Claims an investor given tomorrow's news would go bust within a year
  • Information advantage often leads to overconfidence
  • People tend to overtrade and mismanage position sizing when they think they have an edge