Han, Heejoon; Kutan, Ali Mustafa; Ryu, Doojin - 2015
the VKOSPI. In addition, we find that the stock market return and implied volatility index of the US market (i.e., the S …) the statistical properties of the Korea's representative implied volatility index (VKOSPI) derived from the KOSPI 200 … options and (b) macroeconomic and financial variables that can predict the implied volatility process of the index, using …