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자료유형
학술저널
저자정보
엄철준 (부산대학교) 박종원 (서울시립대학교) Taisei Kaizoji (Graduate School of Arts & Sciences International Christian University (Japan)) Enrico Scalas (Department of Mathematics University of Sussex (United Kingdom))
저널정보
한국파생상품학회 선물연구 선물연구 제26권 제1호
발행연도
2018.2
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1 - 25 (25page)

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This paper empirically examines the statistical properties of realized volatility and the relationships between volatility and correlation measurements of realized volatility by using intraday high-frequency foreign exchange (FX) rates. Results regarding the distributional and dynamic properties of realized volatility are in agreement with the findings of previous studies. However, the positive correlation present in previous studies is not found in the case of JPY. On trading days with low volatility in the FX market, realized correlation coefficients between JPY and other currencies have positive values, while realized correlation coefficients on trading days with high volatility show negative values. These results are due to the Japanese government's intervention in the FX market, particularly during trading days with high volatility. In this regard, our results suggest that the positive relationships between volatility and correlations verified in previous studies are not a general phenomenon in the case of government intervention and government intervention may distort the efficiency of the FX market. In addition, we show that the multivariate measurement of realized volatility based on intraday high-frequency data can be a useful tool for determining the occurrence of external intervention in the FX market.

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