To lag or not to lag? How to compare indices of stock markets that operate at different times
AbstractFinancial markets worldwide do not have the same working hours. As a consequence, the study of correlation or causality between financial market indices becomes dependent on wether we should consider in computations of correlation matrices all indices in the same day or lagged indices. The answer this article proposes is that we should consider both. In this work, we use 79 indices of a diversity of stock markets across the world in order to study their correlation structure, and discover that representing in the same network original and lagged indices, we obtain a better understanding of how indices that operate at different hours relate to each other.
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Bibliographic InfoPaper provided by arXiv.org in its series Papers with number 1201.4586.
Date of creation: Jan 2012
Date of revision: Jul 2013
Publication status: Published in Physica A 403 (2014) 227-243
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Web page: http://arxiv.org/
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