The Rational Reminder Podcast

Episode 314 - Professor Valentin Haddad: How Competitive is the Stock Market?

11 snips
Jul 18, 2024
Associate Professor of Finance, Valentin Haddad, discusses passive investing, stock market bubbles, and the impact of COVID-19 on investment-grade corporate bonds. Topics include market elasticity, strategic interactions, the rise of passive investing, and the relationship between innovation and stock market bubbles.
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INSIGHT

Passive Trading Now Dominates Large Share

  • About 40% of trading in modern markets is passive, a large structural shift over decades.
  • Valentin Haddad warns this change meaningfully alters how prices respond to trading activity.
INSIGHT

Elasticity Explains Market Absorption

  • Demand elasticity measures how much investors buy when a stock price falls by 1% without a clear reason.
  • Haddad links lower elasticity to investors not leaning against price moves, reducing market stabilizing trades.
INSIGHT

Trading Is Strategic, Not Independent

  • Strategic interaction means investors choose trading intensity based on others' actions, not in isolation.
  • Haddad argues this adaptation determines whether active investors replace departing ones and affects market stability.
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