Quote from blk:
This gives an idea of what to expect. So even if VIX cash goes up, VIX futures might not. Hope this helps.![]()
Yes, that is part of the non-transparency I was referring to. VIX spot calculation is straightforward and a direct derivative of SPX implied vols. There is no room for interpretation. VIX options are a different matter.
The VIX Options FAQ explains it very clearly:
http://www.cboe.com/micro/vix/VIXoptionsFAQ.aspx
"VIX option prices should reflect the forward value of VIX, which is typically not as volatile as spot VIX. For instance, if spot VIX experienced a big up move, call option prices might not increase as much as one would expect."
The problem is, how does one arrive at a forward value for VIX? It's not simply a case of cost-of-carry.
This is perhaps why Riskarb refers to these as perception trades. The VIX forward value is based on perception. Sure you can model in mean-reversion and non-lognormal distributions etc. but the forward is still a market perception.
Furthermore, to price the VIX options, like other options, one needs a sense of volatility for the underlying and even have a forecast for the future realized volatility - in this case the underlying is the VIX forward, which incidentally has a different volatility to VIX spot!
So, in short, the VIX options are in theory priced on the expected volatility of the forward implied volatility (vvol) of SPX options 30 days out!
Clear as mud then LOL. Comprehension of this product is not an insurmountable task though.
Earlier thread on VIX options that may be of interest:
http://www.elitetrader.com/vb/showthread.php?s=&threadid=63150
Good luck.
MoMoney.