Quote from fisho:
The Vix term structure is often in a contango or backwardization situation (like now) so I was wondering if it is possible to exploit the "out of line" situation.
Imagine if Vix spot =18 Vix NOV= 25 Vix DEC=21.
Would you consider it normal ?
What you refer to "out of line" isnt necessarily a divergence from fairval. VIX curvature isnt always linear whether in backwardation or contango. I've seen \_/ curves, /\/\ curves, \/\/ curves, \_ curves, you name it. Even if we assume that "fairval" is model independent, many factors influence the exact shape of the curve i.e. proximity to cash, FOMC meeting, supply/demand(illiquid months), etc. There are sometimes divergences that are tradable but this isnt one of them. The Nov contract is the front month contract and given the distance to cash and the fact that we have an important FOMC date before expiry it is pricing "expected" vols accordingly. There is no arb here, nor is there any edge present anywhere on the current VIX curve.