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.
2020-03-26 10:31:00 Thursday ET

The unique controversial management style of Steve Jobs helps translate his business acumen into smart product development. Jay Elliot (2012) Leading
2019-02-07 07:25:00 Thursday ET

President Trump picks David Malpass to run the World Bank to curb international multilateralism. The Trump administration seems to prefer bilateral negotiat
2026-10-31 12:38:00 Saturday ET

Today tech titans and billionaires continue to reshape global pharmaceutical investments for both better healthspan and longer lifespan. We discuss, desc
2018-08-11 14:35:00 Saturday ET

The Trump administration imposes 20%-50% tariffs on Turkish imports due to a recent spat over the detention of an American pastor, Andrew Brunson, in Turkey
2019-12-07 11:30:00 Saturday ET

China turns on its 5G telecom networks in the hot pursuit of global tech supremacy. China Telecom, China Unicom, and China Mobile disclose 5G fees of $18-$2
2018-08-27 09:35:00 Monday ET

President Trump and his Republican senators and supporters praise the recent economic revival of most American counties. The Economist highlights a trifecta