Research Article

Long Memory and Fractality in the Universe of Volatility Indices

Table 1

Descriptive statistics for the levels of the nine CBOE volatility indices.

Volatility indexMeanMaxMinSDSkewnessKurtosisJarque–BeraADF test

VIX23.14882.69013.7508.1991.9348.3606106.486−4.468
VXN22.04680.64010.3109.3242.31810.44910758.400−5.022
VXO19.79093.8506.32010.6502.49811.67414004.380−5.067
VXD18.87774.6007.5808.8672.44210.56211323.660−4.212
RVX24.97587.62011.83010.9652.0378.0205842.102−4.355
VPD248.506500.01069.26099.8280.3672.246154.767−1.232
OVX37.975325.15014.50019.2094.46339.260194874.000−5.333
VVIX90.860207.59059.74015.5081.5278.2455147.311−9.48
SKEW125.401159.030107.2308.2850.7023.146278.5628−8.681

Note: the sample period is October 5, 2007, to October 5, 2020, yielding 3,354 daily observations. denotes significance at the 5% level. ADF test is conducted with intercept.