The intention of this paper is to propose PD calibration framework for low default portfolios (LDP) that allows producing smooth non-zero PD estimates for any given time horizon within the length of economic cycle. The approach produces PDs that are consistent with two main anchors – PIT and TTC PD estimates and are subject to smooth, monotonic transition between those two anchors. In practise, proposed framework could be applied to risk-based pricing of LDP portfolio deals. Moreover, according to the author opinion, the approach is generally compliant with the new IFRS 9 requirements regarding PD termstructure calibration for provisioning.
