Sun, Yiguo; Wu, Ximing - In: Journal of risk and financial management : JRFM 11 (2018) 2, pp. 1-20
This paper studies the contemporaneous relationship between S&P 500 index returns and log-increments of the market volatility index (VIX) via a nonparametric copula method. Specifically, we propose a conditional dependence index to investigate how the dependence between the two series varies...
