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CDAR

Leading research at the intersection of financial economics and data science.

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ARTICLES

CURRENT EVENTS

SEM217: Baeho Kim, Korea University:Long-History PCA under Dynamic Factor Model with Weaker Loadings (Joint work with Robert M. Anderson and Donghan Ryu)

Tuesday, April 23rd @ 11:00-12:30 PM, 648 Evans Hall and Zoom

The accurate estimation of the covariance matrix and its inverse (= precision) matrix of asset returns significantly shapes the range of admissible portfolio compositions and the potential magnitude of associated losses, given the portfolio manager's predetermined risk budget. In this study, we propose Long-History PCA (LH-PCA), which uses longer data histories (T_L), such as 1500 trading days or six years, to predict daily portfolio risks. We show that LH-PCA consistently estimates dynamic factor models with essentially arbitrary variable volatility structures and time-varying loadings with heterogeneous strengths.

AMS Special Session: Loeb Measure after Fifty Years

The Special Session included fourteen research papers and a one-hour discussion session.  Two of Robert Anderson's papers were included in the program:
"General Equilibrium Theory for Measure-Theoretic Economies," joint with Haosui Duanmu, M. Ali Khan, and Metin Uyanik. 
"Existence of Berk-Nash equilibrium with infinite spaces," joint with Haosui Duanmu, Aniruddha Ghosh and M. Ali Khan.