Transaction volatility allows investors to hedge volatility risks associated with a derivative position against unfavourable market movements of underlying/underlying assets. It also allows investors to speculate in the future or take a look at volatility levels. Indeed, commercial volatility is greater than Delta coverage, which uses options to cast views on the future direction of volatility. This is used to increase exposure to implied forward volatility and is generally similar to trading with a longer option and cutting your gamma exposure with another option with expiration equal to the start date in advance, constantly balanced, so that you are flat gamma. In a very current (fairly condensed) discussion paper, I saw that Rolloos also deducted a price approximation without a model for pre-start flights: especially looking at FX, but I think that`s a general question. any good reference would be appreciated. FVA is not mentioned in Derman`s paper (“More than you ever wanted to know about volatility swaps”) A pre-volatility start swap is really a future volatility swap. In another thread, I wrote that Rolloos -Arslan wrote an interesting document on the approximation of prices without a Spot-Start-Volswap model. In terms of sensitivity, it is similar to go-start-flight/var swaps because you have no gamma and you have exposure to the front flight. However, it is different that you are exposed to standard vega deformations of the vanilla and MTM options because of the tilt, as the spot moves away from the original trading date. FVA has nothing to do with Volswaps. This is Forward Volatility Agreement and you enter into a purchase/sale of a vanilla launch option in advance with black scholes settings (except spot price) that were set today. I think the underlying idea is that the future ATM IV is a substitute for future volatility realized.
But the ATM IV, spot or future, is not a good proxy for expected volatility, if there is a significant correlation between the underlying and volatility. As I understand it, an FVA is a swap on the volatility of under-induced money in the future, which is ensured by a forward startup/straddle option. An agreement between a seller and a buyer to exchange a Straddle option on a specified expiry date. On trading day, counterparties determine both expiry date and volatility.