Black

Subtype of Pricing Method

Assumes that the underlying forward rate F follows the Black process so that it is lognormally distributed at any future time.
Concretely F is diffused as dF = σFdw in its martingale measure, where σ may be time dependent.
The QuantLib engine used is the BlackCapFloor in the interest rate case and the YoYInflationBlackCapFloor in the inflation case.