کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5059152 | 1371776 | 2014 | 5 صفحه PDF | دانلود رایگان |
- We propose a new method for estimating tail correlations.
- The method permits direct estimation of complete tail-correlation matrices.
- The results are useful for risk assessment and risk management.
- Important restrictions, such as positive semidefiniteness, can be imposed.
- An empirical application to 30 stocks demonstrates practical usefulness.
Empirical evidence suggests that asset returns correlate more strongly in bear markets than conventional correlation estimates imply. We propose a method for determining complete tail-correlation matrices based on Value-at-Risk (VaR) estimates. We demonstrate how to obtain more efficient tail-correlation estimates by use of overidentification strategies and how to guarantee positive semidefiniteness, a property required for valid risk aggregation and Markowitz-type portfolio optimization. An empirical application to a 30-asset universe illustrates the practical applicability and relevance of the approach in portfolio management.
Journal: Economics Letters - Volume 122, Issue 1, January 2014, Pages 69-73