Investing Research Articles

Are correlations and R-squared statistics sufficient to discover reliable connections between financial/economic variables and future asset returns? In their February 2025 paper entitled “Causal Factor Analysis is a Necessary Condition for Investment Efficiency”, Marcos Lopez de Prado, Alexander Lipton and Vincent Zoonekynd assess the consequences of factor model misspecification for portfolio optimization (maximizing expected return… Keep Reading

How can investors avoid out-of-sample factor investing strategy failures driven by use of non-causal research methods? In their May 2025 paper entitled “A Protocol for Causal Factor Investing”, Marcos Lopez de Prado and Vincent Zoonekynd introduce the concept of the factor mirage, a factor model that appears statistically valid but is causally mis-specified. They then… Keep Reading

Can investors rely upon general-purpose Artificial Intelligence (AI) to tackle the complex data science problems of investment analysis? In his July 2025 presentation package entitled “AI Challenges in Mathematical Investing”, Marcos Lopez de Prado addresses why AI-driven methods fail in the context of investing and offers insights into how these challenges can be mitigated. Based… Keep Reading

The Sharpe ratio is the most widely used measure of investment efficiency. Is it truly reliable? In their September 2025 paper entitled “How to Use the Sharpe Ratio”, Marcos Lopez de Prado, Alexander Lipton and Vincent Zoonekynd review the shortcomings of conventional Sharpe ratio analysis and tackle these issues via several corrections. They also address… Keep Reading