I'm using VCUB on Bloomberg for ATM cap volatilities and have noticed there are a few "flavors" of volatilities. I would like simply use ATM flat vols to bootstrap forward volatilities from caplets using Black's formula.
In this case, I am assuming that Black Vol (IBOR) would be the correct choice for obtaining data on flat implied volatilities from the cap prices (from which fwd vols can be found).
Would anyone know if this is the right way to go? If not, is one volatility favored over another (ex: Black (OIS) vs. Black (IBOR))?