A model for correlations in stock markets

Jae Dong Noh
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Jae Dong Noh: CTP,SNU

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Abstract: We propose a group model for correlations in stock markets. In the group model the markets are composed of several groups, within which the stock price fluctuations are correlated. The spectral properties of empirical correlation matrices reported in [Phys. Rev. Lett. {\bf 83}, 1467 (1999); Phys. Rev. Lett. {\bf 83}, 1471 (1999.)] are well understood from the model. It provides the connection between the spectral properties of the empirical correlation matrix and the structure of correlations in stock markets.

Date: 1999-12
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Published in Phys. Rev. E {\bf 61}, 5981 (2000)

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