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Risk Spillovers in International Equity Portfolios

  • Bonato, Mateo

    ()

  • Caporin, Massimiliano

    ()

  • Ranaldo, Angelo

    ()

We define risk spillover as the dependence of a given asset variance on the past covariances and variances of other assets. Building on this idea, we propose the use of a highly flexible and tractable model to forecast the volatility of an international equity portfolio. According to the risk management strategy proposed, portfolio risk is seen as a specific combination of daily realized variances and covariances extracted from a high frequency dataset, which includes equities and currencies. In this framework, we focus on the risk spillovers across equities within the same sector (sector spillover), and from currencies to international equities (currency spillover). We compare these specific risk spillovers to a more general framework (full spillover) whereby we allow for lagged dependence across all variances and covariances. The forecasting analysis shows that considering only sector- and currency-risk spillovers, rather than full spillovers, improves performance, both in economic and statistical terms.

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File URL: http://www1.vwa.unisg.ch/RePEc/usg/sfwpfi/WPF-1214.pdf
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Paper provided by University of St. Gallen, School of Finance in its series Working Papers on Finance with number 1214.

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Length: 33 pages
Date of creation: Feb 2012
Date of revision:
Handle: RePEc:usg:sfwpfi:2012:14
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Web page: http://www.unisg.ch/de/Schools/Finance.aspx

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