Start Delay

Key Start Delay in Yield Curve Swp refers to an optional time interval Δ that defines the effective (start) date T of the swaps as:
T = Tₛ + Δ
where
Tₛ is the settlement date Tₛ = T₀ + s where T₀ is the trade date and s is the settlement period incorporated in the index Ibor Index
If omitted, the swaps start on Tₛ