In this episode of Excess Returns, we sit down with AQR founder Cliff Asness for a fascinating discussion about market efficiency, behavioral finance, and the future of quantitative investing. In this wide-ranging conversation, we explore Cliff's recent paper "The Less Efficient Market Hypothesis" and discuss why markets might actually be becoming less efficient over time, despite advances in technology – a counterintuitive but compelling argument. We dig into how social media and constant connectivity might be making markets more prone to extremes, the real impact of passive investing, and why periods of market irrationality might last longer than ever before. Cliff shares his perspective on the current market concentration in the Magnificent Seven stocks and offers insights on high-volatility alternatives from his latest paper. The conversation also covers the role of intuition in factor investing, inflation's impact on markets, and ends with Cliff's essential advice for the average investor. Throughout the discussion, Cliff brings his characteristic mix of academic rigor and practical wisdom, peppered with his unique brand of humor. Whether you're a quant enthusiast, professional investor, or just interested in understanding today's markets better, this conversation offers valuable insights from one of the industry's most influential voices.

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14. L’intelligence artificielle russe : entre ambition de puissance et défis structurels !