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International comovement of stock market returns: a wavelet analysis

António Rua and Luis Nunes ()

Working Papers from Banco de Portugal, Economics and Research Department

Abstract: The assessment of the comovement among international stock markets is of key interest, for example, for the international portfolio diversification literature. In this paper, we re-examine such comovement by resorting to a novel approach, wavelet analysis. Wavelet analysis allows one to measure the comovement in the time-frequency space. In this way, one can characterize how international stock returns relate in the time and frequency domains simultaneously, which allows one to provide a richer analysis of the comovement. We focus on Germany, Japan, UK and US and the analysis is done at both the aggregate and sectoral levels.

JEL-codes: C40 E32 G15 F30 (search for similar items in EconPapers)
Date: 2009
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