Graphical Representation of CBOE’s VIXMO Calculation (Redirected)
The dynamically updated chart above uses delayed quotes from Google Finance. It details the interpolation / extrapolation process that computes the 30 day VIXMO from two close-in months of SPX options (VINMO and VIFMO). This calculation is the legacy version of the VIX that was used from 23-Sept-2003 through 5-Oct-2014. On October 6th, 2014 the CBOE modified the calculation to start using SPX weekly options …