Home > Library > Algorithmic credit portfolio segmentation
Author Andy Yeh Alpha
This research article proposes a new algorithmic model for credit portfolio segmentation.
Description:
Under the new Basel bank capital framework, each bank must group its retail exposures into multiple segments with homogeneous risk characteristics. The U.S. regulatory agencies believe that each bank may use its internal risk models for the loan-level risk parameter estimates such as probability of default (PD) and loss given default (LGD) to group individual exposures into the resultant segments with homogeneous risk attributes. In stark contrast to the conventional decision-tree method, we propose a new algorithmic technique for retail consumer loan portfolio segmentation. This new technique identifies the optimal number of segments, sorts the individual loan exposures into the various segments, and then leads to the minimal degree of risk heterogeneity in comparison to the baseline equal-bin and quantile-bin schemes. Furthermore, we analyze the Monte Carlo implicit asset correlation values for the retail loan segments over time to help assess the implications for bank capital measurement. The best-fit method for retail credit portfolio segmentation results in some capital relief that serves as an economic incentive for the bank to invest in this alternative segmentation. This positive outcome accords with the core principle of statistical conservatism that the financial econometrician enshrines in the Basel regulatory requirements for bank capital measurement.
2023-11-28 11:35:00 Tuesday ET

David Colander and Craig Freedman argue that economics went wrong when there was no neoclassical firewall between economic theories and policy reforms. D
2017-12-01 06:30:00 Friday ET

Dr Kai-Fu Lee praises China as the next epicenter of artificial intelligence, smart data analysis, and robotic automation. With prior IT careers at Apple, M
2019-03-07 12:39:00 Thursday ET

A physicist derives a mathematical formula that success equates the product of both personal quality and the potential value of a random idea. As a Northeas
2026-04-30 08:28:00 Thursday ET

In the current global market for better biotech advances, medical innovations, and healthcare services, the new integration of artificial intelligence (AI)
2019-09-21 09:25:00 Saturday ET

President Trump praises great unity and progress at the G7 summit with respect to Sino-U.S. trade conflict resolution, global climate change, containment fo
2019-08-30 11:35:00 Friday ET

The conventional wisdom suggests that chameleons change their skin coloration to camouflage their presence for survival through Darwinian biological evoluti