Estimating Extremal Dependence in Univariate and Multivariate Time Series via the Extremogram

Details Estimating Extremal Dependence in Univariate and Multivariate Time Series via the Extremogram Estimating Extremal Dependence in Univariate and Multivariate Time Series via the Extremogram

2011-07-27

arxiv.org/abs/1107.5592v1

Statistics

Methodology

29 pages

Scientific paper

Davis and Mikosch [7] introduced the extremogram as a flexible quantitative tool for measuring various types of extremal dependence in a stationary time series. There we showed some standard statistical properties of the sample extremogram. A major difficulty was the construction of credible confidence bands for the extremogram. In this paper, we employ the stationary bootstrap to overcome this problem. Moreover, we introduce the cross extremogram as a measure of extremal serial dependence between two or more time series. We also study the extremogram for return times between extremal events. The use of the stationary bootstrap for the extremogram and the resulting interpretations are illustrated in several univariate and multivariate financial time series examples.

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