Effect of changing data size on eigenvalues in the Korean and Japanese stock markets

Details Effect of changing data size on eigenvalues in the Korean and Japanese stock markets Effect of changing data size on eigenvalues in the Korean and Japanese stock markets

2008-11-25

arxiv.org/abs/0811.4021v2

Economy

Quantitative Finance

Statistical Finance

Scientific paper

In this study, we attempted to determine how eigenvalues change, according to random matrix theory (RMT), in stock market data as the number of stocks comprising the correlation matrix changes. Specifically, we tested for changes in the eigenvalue properties as a function of the number and type of stocks in the correlation matrix. We determined that the value of the eigenvalue increases in proportion with the number of stocks. Furthermore, we noted that the largest eigenvalue maintains its identical properties, regardless of the number and type, whereas other eigenvalues evidence different features.

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