ScholarWorks@중앙대학교

초록

In this paper, it is analyzed how the conditional correlations among commodity derivatives and domestic and global financial markets changes as the commodity derivatives financialize deeply. Recent development in commodity derivatives markets have exceptional in many ways. One of them is the financialization of the commodity derivatives. As the global economy is getting deeply integrated and performances of capital markets remain relatively low and the demand for raw materials surges, significantly increased amounts of money have flowed into the commodity markets. As a result, the market capitalization of the commodity derivatives markets has sharply increased since 2004. The financialization of the commodity derivatives changes characteristics of the commodity markets. Volatilities of prices of commodity derivatives increase and correlations between equities or bonds are changed. In this research, main concerns are volatilities and conditional correlations among commodity derivatives markets and global financial markets. Those include Korean stock market (KOSPI), Korean bond market, Korean won, US dollar foreign exchange market, global equity market (MSCI), global bond market (CITI), commodity derivative market (CRB), and energy market (WTI). DCC-MGARCH model is used to analyze volatilities of each index and conditional correlations among all variables. Volatilities of all indexes are sharply increased during the period of the global financial crisis. Volatilities of global bond market and commodity derivative market are relatively mild even during the crisis period. The index CITI for the global fixed-income market is composed of treasury bonds that are relatively stable than any other corporate bonds or equities. Relative low level of volatility of the commodity index is due to the heterogeneities of the composition of CRB index. However, the volatility of the crude oil market (WTI) is larger than those of other financial markets. Estimated conditional correlations change dramatically. The conditional correlations between commodity derivatives (CRB, WTI) and equity markets (KOSPI, MSCI) show overall positive, and they are strengthened after the global financial crisis. This is because the composition ratio of the oil in the commodity index is biggest. And the herding behavior of investors during the crisis period makes the degree of co-movement of KOSPI and MSCI prices higher. The conditional correlation between KOSPI and CRB shows overall positive and goes up during the crisis period, as does that of between KOSPI and WTI. This is due to the fact that, since the global financial crisis, investors regard increased demand for commodities and oil as the increased expectation of economic recovery. The conditional correlations between commodity derivatives (CRB, WTI) and fixed-income security markets show overall positive, but they are weakened after the global financial crisis. Since the financialization of the commodity derivatives and the global financial crisis changed characteristics of the commodity derivatives as the alternative asset class, investors and risk managers need to consider those changes.

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