| Summary: | 碩士 === 國立政治大學 === 金融學系 === 88 === Systematic credit risk is default risk, which is a problem any enterprises and banks may face. When the economy is in the downturn, enterprises or individuals may not afford to pay the principal and interests on time. At this moment, the probability of the occurrence of the credit risk is very high. In contrast, when the economy is in the upturn, enterprises and individuals’ ability of paying back the debt is lifted. Apparently, the probability of the occurrence of the credit risk is low at this moment. Therefore, the so-called systematic credit risk is business cycle risk.
This thesis presents a direct and simple concept to hedge the systematic credit risk. Since the business cycle affects the level of systematic risk, our purpose now is to hedge the business cycle risk. Besides, from the previous surveys, the change of stock market is a leading index of business cycle. As a result, we can predict the economy situation in the future by stock index and hedge the business cycle risk by purchasing or selling stock index futures contracts in advance.
This thesis do empirical study depended on the data of eight developed or developing countries, inclusive of Taiwan, U.S.A., England, France, Japan, Switzerland, Mexico, and Australia. We choose real GDP growth rate or industry product index as business cycle index, and then run simple OLS, rolling regression, quadratic regression, and simple OLS under downturn to get the hedge ratio and its t-value.
The empirical results are as follows:
1、The relationship between the rate of return of stock index futures and real GDP growth rate in Taiwan, Japan, and Australia is positive. In other words, the rate of return of stock index futures can be a predictor of real GDP growth rate and the t-value of the hedge ratio is significant. Therefore, we can hedge the systematic credit risk in these countries by selling stock index futures contracts in advance.
2、In most periods, the relationship between the rate of return of stock index futures and real GDP growth rate in U.S.A. and England is positive. Therefore, the change of stock market still can predict the business cycle and we can apply the hedge concept in this thesis in the two countries.
3、The relationship between the rate of return of stock index futures and real GDP growth rate in France and Switzerland is negative. In other words, the change of stock market can’t early reflect the phenomenon of business cycle and the t-value of the hedge ratio is not significant. As a result, the hedge concept presented in my thsis is not applicable in these countries.
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