A technical study from Passify examining how unintended strategy correlation increases portfolio risk and the necessity ...

A new Passify analysis explores the biological factors of decision fatigue in discretionary trading and the role of ...

Discover the importance of homoskedasticity in regression models, where error variance is constant, and explore examples that illustrate this key concept.

Discover how to calculate covariance to assess stock relationships and optimize your portfolio, balancing risk and potential ...

Abstract: We study Markowitz's mean-variance portfolio optimization problem. When practically using this model, the mean vector and the covariance matrix of the assets returns often need to be ...

Abstract: Digital surface model (DSM) block adjustment is a crucial step to improve absolute height accuracy and consistency within overlap in large-scale topographic ...

John Wilkerson is a Washington correspondent for STAT who writes about the politics of health care. He is also the author of the twice-weekly D.C. Diagnosis newsletter. Emory is the data editor at ...