I thought that's what you might have meant. If you have a way to replicate your version of realized vol, then with the var swap you have a perfect arb. Say for example, you are confident that if you delta-hedged your long option portfolio x times a day, your realized vol (aka gamma scalped gains) would be higher than the eod realized vol... You can sell the var swap and lock in your profits.Quote from kapw7:
For example let's say you have (in theory) a 100% accurate prediction model for the variance of the SPX500 over the 30 days to maturity of a var swap contract. However what you predict now very accurately will not be (?) exactly the "realised variance" on maturity based on the market definition for the contract
Anyway there is a lot of interesting and practical material in this thread and I am actually studying your example posts, so I would hate to derail it.
As far as derailing, I've been kinda concerned I'm derailing with my over pedantic posts. I'd just hope everyone keeps posting their thoughts / questions, we can all wade through and learn together.