장외 개별주식옵션과 신용스프레드의 관계에 관한 실증연구

The objective of this study is to analyze whether both the implied volatility of OTC individual equity options and jump are statistically significant determinants for credit spreads on Korean corporate bonds. we performed regression analysis using the quoted OTC individual equity options and credit spreads data on 33 firms from March 2005 to June 2014, for verify the R-squared value of corporate variables (implied volatility of individual stock options, jump of individual stock, historical volatility of individual stock and liability ratio), Market variables (implied volatility of KOSPI200 index option, jump of KOSPI200 index and historical volatility of KOSPI200 index) and control variables (rate of return market and individual, 3-year, 10-year treasury bond rate, swap rate and corporate bond rate). The main empirical results of the study are summarized as follow: First, we checked that implied volatility of OTC individual stock options include the credit risk information of individual corporate. Second, R-squared value has different tendencies for short-long term and market. In research result of the United States market by Cremers et al.(2008), R-squared value of long-term bond market is higher, while in Korea's market, it has an opposite result. Third, in the regression analysis of various option types, put option variables which are used to hedge the downside-risk show statistically highly significant about short and long-maturity credit spreads.