Couple of basic questions:
1- I'd like to calculate the implied of VIX options intraday, without access to intraday VIX futures. In the absence of VIX futures as underlyings, what would be the pitfalls of backing out the underlying forward prices using Calls - Puts + strike, and using these synthetics in my IV calculation?
2- Even in a case where futures are available, I noted that sometimes a couple of contracts on the term structure are just missing values (even from CBOE website) while options with matching maturities still trade. What would be an explanation?
Thanks in advance!