Disentangling Systematic and Idiosyncratic Risk for Large Panels of Assets
AbstractWhen observed over a large panel, measures of risk (such as realized volatilities) usually exhibit a secular trend around which individual risks cluster. In this article we propose a vector Multiplicative Error Model achieving a decomposition of each risk measure into a common systematic and an idiosyncratic component, while allowing for contemporaneous dependence in the innovation process. As a consequence, we can assess how much of the current asset risk is due to a system wide component, and measure the persistence of the deviation of an asset specific risk from that common level. We develop an estimation technique, based on a combination of seminonparametric methods and copula theory, that is suitable for large dimensional panels. The model is applied to two panels of daily realized volatilities between 2001 and 2008: the SPDR Sectoral Indices of the S&P500 and the constituents of the S&P100. Similar results are obtained on the two sets in terms of reverting behavior of the common nonstationary component and the idiosyncratic dynamics to with a variable speed that appears to be sector dependent.
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Bibliographic InfoPaper provided by Universita' degli Studi di Firenze, Dipartimento di Statistica "G. Parenti" in its series Econometrics Working Papers Archive with number wp2010_06.
Date of creation: Jul 2010
Date of revision:
Systematic risk; idiosyncratic risk; Multiplicative Error Model; seminonparametric; copula.;
Other versions of this item:
- Matteo Barigozzi & Brownlees Christian & Gallo Giampiero & David Veredas, 2012. "Disentangling systematic and idiosyncratic risks for large panels of assets," ULB Institutional Repository 2013/136237, ULB -- Universite Libre de Bruxelles.
- C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models
- C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
- G01 - Financial Economics - - General - - - Financial Crises
This paper has been announced in the following NEP Reports:
- NEP-ALL-2010-08-14 (All new papers)
- NEP-ECM-2010-08-14 (Econometrics)
- NEP-RMG-2010-08-14 (Risk Management)
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- repec:oxf:wpaper:264 is not listed on IDEAS
- Matteo Luciani & David Veredas, 2012. "A model for vast panels of volatilities," Banco de EspaÃÂ±a Working Papers 1230, Banco de EspaÃ±a.
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