As an aside, I have noticed today that the VX future has provided a decent level of hedge protection against the ES at a 1:1 ratio (as opposed to VX hedge on NQ. It was starting to look like 2 VX : 1 NQ) Testing is still very early, but it shows promise.
That hedge ratio is not constant nor fixed so be very careful relying on a fixed ratio for all time. I have run many correlation and regressions of ES v. VX front months and the hedge ratio kept changing as the market changes. I came up with a central more common ratio but it would have to be adjusted based on market conditions and amount of hedge I wanted. In other words despite all the science it still came down to art.
