The Rational Reminder Podcast

Episode 346 - Hendrik Bessembinder: Why It's So Hard to Beat the Market

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Feb 27, 2025
Join Hendrik Bessembinder, a finance professor at Arizona State University, as he uncovers why most stocks underperform Treasury bills. He reveals that a small number of stocks drive the majority of market returns, challenging traditional investing strategies. Listen in as he discusses the role of skewness, the complexities of mutual fund performance, and common investing mistakes. Learn how chasing past returns can lead to costly errors, and discover effective strategies for building a robust portfolio that endures market fluctuations.
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INSIGHT

Skewness in Stock Returns

  • Positive skewness in stock returns means a few big outcomes pull up the average.
  • The average doesn't represent typical outcomes, being higher than the median.
INSIGHT

Surprise Factor of the 2018 Paper

  • Bessembinder's 2018 paper surprised many by revealing the magnitude of skewness's impact on stock returns.
  • While some were aware of this, the paper's systematic, long-term analysis was novel.
INSIGHT

Stocks vs. Treasury Bills

  • Only about 42% of individual stocks outperform treasury bills over their lifetime.
  • This highlights the importance of careful stock selection and the impact of positive skewness.
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