Dating multiple change points in the correlation matrix
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Pedro Galeano [2] ; Dominik Wied [1]
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[1] University of Cologne
University of Cologne
Kreisfreie Stadt Köln, Alemania
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[2] Universidad Carlos III
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- Localización: Test: An Official Journal of the Spanish Society of Statistics and Operations Research, ISSN-e 1863-8260, ISSN 1133-0686, Vol. 26, Nº. 2, 2017, págs. 331-352
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
A nonparametric procedure for detecting and dating multiple change points in the correlation matrix of sequences of random variables is proposed. The procedure is based on a recently proposed test for changes in correlation matrices at an unknown point in time. Although the procedure requires constant expectations and variances, only mild assumptions on the serial dependence structure are assumed. The convergence rate of the change point estimators is derived and the asymptotic validity of the procedure is proved. Moreover, the performance of the proposed algorithm in finite samples is illustrated by means of a simulation study and the analysis of a real data example with financial returns. These examples show that the algorithm has large power in finite samples.
