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Analysis of the volatility’s dependency structure during the subprime crisis

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In this article, we test the hypothesis of contagion amongst sectors within the United States’ economy during the subprime crisis. The econometric methodology applied here is based on the dynamic conditional correlation model proposed by Engle (2002). Further, we applied several Lagrange multiplier (LM)-robust tests to test whether there were structural breaks in series’ dependency structures during the period of interest. Events theoretically classified as relevant to the crisis upshots as well as the interactions between the moments of the series were used as indicator functions to the referred structural breaks. The main conclusion of this study is that one can indeed observe contagion within almost all pairs of sectors’ indices. Thus, we conclude that the dependency structure of the sectors of interest has faced structural changes during the years of 2007 and 2008. Hence, diversification strategies as well as the risk analysis inherent to the portfolios’ management may have been drastically affected.
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Keywords: C52; DCC; G10; financial contagion; financial crises; volatility

Document Type: Research Article

Affiliations: 1: London School of Economics and Political Science, LSE, London, UK 2: São Paulo School of Economics – FGV, São Paulo, Brazil

Publication date: 2013-12-01

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