August 21st, 2007, 10:51 pm
And the tradable instrument is the futures contract (unless you want to try and replicate the short dated options used in the index calculation). The huge volatility in this short dated contract (just look at the last two to three weeks) makes it a poor hedge for the more usual (6/12/24 months) variance swaps that tend to be traded OTC. In some sense it can be used as a hedge for portfolios.