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.
2019-09-23 12:25:00 Monday ET

Volcker, Greenspan, Bernanke, and Yellen contribute to a Wall Street Journal op-ed on monetary policy independence. These former Federal Reserve chiefs unit
2023-03-14 16:43:00 Tuesday ET

Several feasible near-term reforms can substantially narrow the scope for global tax avoidance by closing information loopholes. Thomas Pogge and Krishen
2017-10-21 08:45:00 Saturday ET

Netflix stares at higher content costs as Disney and Fox hold merger talks. Disney has held talks to acquire most of 21st Century Fox's business equity.
2027-07-31 13:25:00 Saturday ET

In the broader context of stablecoins for asset tokenization worldwide, many governments now seek to enter the global markets for stablecoins and other U.S.
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
2023-07-21 10:30:00 Friday ET

Joseph Stiglitz and Andrew Charlton suggest that free trade helps promote better economic development worldwide. Joseph Stiglitz and Andrew Charlton (200