국제상품시장과 채권․주식시장의 가격 및 변동성의 상호연계성에 대한 연구
Transmission of Price and Volatility in International Commodity, Bonds, and Stock Markets
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최근 국제상품시장의 가격 변동이 증가하고 변동성의 지속성 역시 확대하는 추세이다. 본 연구는 국제상품시장과 채권․주식시장의 가격 동조화 현상 및 변동성의 상호 연계성을 VAR-다변량 GARCH 모형으로 분석하였다. 금융시장간 수익률 및 변동성의 전이효과를 밝히기 위하여 다양한 국제상품가격지수와 국제 유가, 금 가격 등 품목별 상품가격을 사용하였고 주식․채권시장에는 S&P500 주가지수와 미국 재무성증권(TB) 수익률을 이용하였다. 분석기간 1990년 1월~2009년 7월에 대하여 주별 자료로 분석한 결과, 국제상품시장과 주식시장의 수익률과 변동성의 전이효과를 발견하였다. 특히, 국제상품시장의 가격 변동성이 증가한 2003년 이후 국제상품시장과 주식시장의 변동성 전이효과의 크기와 유의성이 2003년 이전에 비하여 큰 폭으로 증가하였다. 이 결과는 최근 국제상품시장과 주식시장의 상호연계성이 증가하고, 금융시장에서 국제상품시장의 중요성이 확장하고 있음을 시사한다
Abstract
The commodity prices revealed wide fluctuation recently, and the volatility showed prolonged persistence. This paper considers the price and volatility transmission in the international commodity, bonds, and stock markets. We extend the multivariate GARCH model to account for volatility causality and common persistence. Using the weekly data for the sample period January 1990~July 2009, we find the transmission between the international commodity market and the stock market. In particular, the transmission becomes apparent for the period 2003~2009 compared to the previous period. Our results demonstrate that the linkage between the commodity and the stock market is growing and the role of the international commodity market magnifies in the financial markets.
참고문헌 (45)
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