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.
2017-04-19 17:37:00 Wednesday ET

Apple is now the world's biggest dividend payer with its $13 billion dividend payout and surpasses ExxonMobil's dividend payout record. Despite the
2019-11-13 11:34:00 Wednesday ET

The new Brexit deal can boost British pound appreciation and economic optimism. British prime minister Boris Johnson wins the parliamentary vote on his new
2019-02-05 10:32:00 Tuesday ET

President Trump remains optimistic about the Sino-American trade war resolution of both trade deficit eradication and tech transfer enforcement. Trump now s
2027-01-31 12:25:00 Sunday ET

In recent decades, many governments have chosen to run high fiscal deficits on top of sovereign debt mountains so that greater government intervention still
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
2019-10-31 13:38:00 Thursday ET

AYA Analytica finbuzz podcast channel on YouTube October 2019 In this podcast, we discuss several topical issues as of October 2019: (1)