Econometric measures of connectedness and systemic risk in the finance and insurance sectors

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Authors Monica Billio, Mila Getmansky, Andrew Lo and Loriana Pelizzon
Journal/Conference Name Journal of Financial Economics
Paper Category
Paper Abstract We propose several econometric measures of connectedness based on principal-components analysis and Granger-causality networks, and apply them to the monthly returns of hedge funds, banks, broker/dealers, and insurance companies. We find that all four sectors have become highly interrelated over the past decade, likely increasing the level of systemic risk in the finance and insurance industries through a complex and time-varying network of relationships. These measures can also identify and quantify financial crisis periods, and seem to contain predictive power in out-of-sample tests. Our results show an asymmetry in the degree of connectedness among the four sectors, with banks playing a much more important role in transmitting shocks than other financial institutions.
Date of publication 2012
Code Programming Language Python
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