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.
2023-09-21 09:26:00 Thursday ET

Jordi Gali delves into the science of the New Keynesian monetary policy framework with economic output and inflation stabilization. Jordi Gali (2015)
2018-09-29 12:39:00 Saturday ET

The Securities and Exchange Commission (S.E.C.) sues Elon Musk for his August 2018 tweet that he has secured external finance to convert Tesla into a privat
2019-02-06 10:36:49 Wednesday ET

President Trump delivers his second state-of-the-union address to U.S. Congress. Several key themes emerge from this presidential address. First, President
2022-11-05 11:32:00 Saturday ET

CEO overconfidence and corporate performance Malmendier and Tate (JFE 2008, JF 2005) argue that overconfident CEOs are more likely to initiate mergers an
2018-06-04 08:38:00 Monday ET

Microsoft acquires GitHub, a software development platform that has been widely shared-and-used by more than 28 million programmers worldwide. GitHub's
2021-02-02 14:24:00 Tuesday ET

Our proprietary alpha investment model outperforms the major stock market benchmarks such as S&P 500, MSCI, Dow Jones, and Nasdaq. We implement