The Rational Reminder Podcast

Episode 302 - Michael Green: Market Efficiency Is Not The Question

22 snips
Apr 25, 2024
Michael Green, Chief Strategist and Portfolio Manager for Simplify Asset Management, discusses the problems with passive investing in financial markets. He covers the negative effects of indexing, implications of market inelasticity, and policy recommendations to address structural issues. The conversation dives into the risks posed by index funds, regulatory impact, societal wealth valuation, and nuances of investing in US stocks and Bitcoin.
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INSIGHT

Passive Market Share Is Underestimated

  • Passive share is materially larger than the simplistic 15% often cited; measuring trades around reconstitutions shows ~35–45% passive.
  • Ignoring separate accounts, swaps, and futures undercounts passive impact.
INSIGHT

Net Selling By Passive Investors Threatens Markets

  • The risk isn't a small correction; it's systematic when passives become net sellers and markets can't provide liquidity.
  • Simulations show outcomes like an 85% fall similar to China's 2015 crash.
INSIGHT

Passive Growth Makes Alpha Disappear

  • Passive penetration warps the market return function from linear to convex, mechanically reducing measured alpha.
  • As passive share rises, active managers' intercepts (alphas) shrink even if skill remains.
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