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A Study on the Time-Varying Characteristics of the Volatility Spillover Index
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변동성전이지수의 시간가변적 특성에 관한 연구

논문 기본 정보

Type
Academic journal
Author
Jonghae Park (경상국립대학교) DaeSung Jung (경상국립대학교)
Journal
The Korean Data Analysis Society Journal of The Korean Data Analysis Society Journal of The Korean Data Analysis Society 제24권 제1호 KCI Accredited Journals
Published
2022.2
Pages
253 - 264 (12page)
DOI
10.37727/jkdas.2022.24.1.253

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A Study on the Time-Varying Characteristics of the Volatility Spillover Index
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Abstract· Keywords

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This study analyzed the information spillover phenomenon between financial markets of the Korea and the United States using the volatility spillover index of Diebold and Yilmaz (2012). Through the volatility spillover index, the results of outflow transference (spillover effect to others), inflow transference (spillover effect from others), net spillover effect, and the moving average rolling sample window analysis are as follows. First, as a result of the analysis of the net spillover effect of returns, US stocks and US bonds showed positive values, while Korean stocks, Korean bonds and exchange rates showed negative values. In other words, it can be confirmed that the US financial market is leading the Korean financial market, and the rate of return is shifting. The volatility spillover index of volatilities also showed similar results. Second, the level of the volatility spillover index seems to have increased after the financial crisis than before the financial crisis. Third, as a result of time-varying confirmation of the impact of quantitative easing in the US on the Korean financial market, the volatility spillover index continued to decline during the period of quantitative easing. On the other hand, the volatility spillover index shows an increasing trend from the time when QE is reduced and the exit strategy is implemented. Through the above results, information on the linkage between returns and volatility between the Korean financial market and the US financial market is expected to be utilized in portfolio management by providing information on the path and magnitude of the spillover effect. In addition, it is expected to be used as a method to manage system risk from the perspective of financial authorities who are trying to secure the stability of the financial market.

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