Relationship of the Change in Implied Volatility with the Underlying Equity Index Return in Thailand

Abstract

The main purpose of this study is to examine the relationship between the change in implied volatility index and the underlying stock index return. The dataset used in this study is from 11/19/2010 to 12/27/2013. The regression analysis is performed on stationary series. The empirical results reveal that there is evidence of a significantly negative and asymmetric relationship between the return and the change in implied volatility in the Thai stock market. The finding in this study gives implication for risk management.