P2.T6.24.8. Credit Scoring and Credit Rating Systems

Nicole Seaman

Director of CFA & FRM Operations
Staff member
Subscriber
Learning Objectives: Compare the credit scoring system to the credit rating system in assessing credit quality and describe the different types of each system. Distinguish between through-the-cycle and point-in-time credit rating systems. Describe the process for developing credit risk scoring and rating models. Describe rating agencies’ assignment methodologies for issue and issuer ratings and identify the main criticisms of the credit rating agencies’ ratings.

Questions:

24.8.1. RiverBank, a commercial lender, is revamping its credit assessment procedures by introducing a Credit Scoring System (CSS) for personal and small business loans and a Credit Rating System (CRS) for larger corporate loans, bond issues, and municipal financing. This is in response to criticism of the previous method, which combined quantitative analytics with loan officer discretion and was deemed inconsistent and slow.

The bank aims to:
  • Minimize subjective judgment in loan approvals via CSS.
  • Use both systems for robust risk management, including scenario analyses and stress testing.
  • Ensure consistency and transparency across customer evaluations using CRS.
  • Enhance loan appraisal efficiency using CSS to curtail time and costs.
Which of the following BEST describes the distinct advantages of implementing the Credit Scoring System (CSS) and Credit Rating System (CRS) at RiverBank?

a. CSS and CRS will eliminate the need for loan officers, reducing personnel costs, while increasing market transparency with public credit evaluations.
b. The CSS will enable fast personal loan evaluations through automated numerical scoring, while the CRS will facilitate standardized risk reporting for large-scale borrowers, attracting external stakeholders.
c. CSS will provide a publicly accessible rating for individual borrowers, increasing market competition, and CRS will replace existing risk management systems to streamline the process.
d. Both CSS and CRS aim to automate the lending process, removing qualitative assessments and reducing risk management's role in loan approvals.


24.8.2. MatrixBank uses a credit risk assessment model called Through-the-Cycle (TTC) rating system to evaluate borrower creditworthiness. Due to recent economic volatility, the bank is considering supplementing the TTC system with a more responsive Point-in-Time (PIT) system, which has divided the board. Some members favor the TTC's stable outlook, while others advocate for the PIT's responsiveness to economic shifts for better credit portfolio management.

John Wick, FRM, MatrixBank's Chief Risk Officer (CRO), has been tasked with presenting the advantages and disadvantages of TTC and PIT systems to the board, aligning each with the bank's long-term strategy and operational realities. John uses two recent borrower cases to highlight the key differences:
  • Firm A, a long-standing client with cyclically stable revenues
  • Firm B, a tech startup experiencing rapid growth but facing current market uncertainty
Which of the following BEST reflects the distinctive features and appropriate application of TTC and PIT credit rating systems in MatrixBank's credit risk assessment?

a. The TTC system would be more suitable for Firm B as it would provide a stable outlook and mitigate risks associated with the startup's rapid but uncertain growth. The PIT system would best serve Firm A by frequently updating its rating in line with the stable market conditions.
b. The PIT system is preferred for both firms as it provides a real-time risk assessment, which is critical for understanding the immediate financial situations of all borrowers, regardless of their revenue stability.
c. The TTC system should be applied to Firm A, considering its stable, long-term revenue and offering a consistent rating less affected by market fluctuations. The PIT system is ideal for Firm B, reflecting the immediate economic environment affecting the startup's rapidly changing situation.
d. MatrixBank should exclusively use the TTC system for all clients because its long-term stability is more aligned with the bank's conservative risk management strategy, despite the recent economic volatility.


24.8.3. CRAs have been crucial in risk management since the early 20th century, assessing different debt instruments, such as government and corporate bonds. Moody's, S&P, and Fitch dominate the market and collectively hold over 90% of the global ratings market share. Despite criticism, their ratings remain essential to financial decision-making.

Which of the following most accurately describes the criticisms of credit rating agencies ratings and their assignment methodologies for issue and issuer ratings?

a. CRAs have been praised for their transparency and the predictive power of their ratings, which proved accurate during the 2007–2008 financial crisis.
b. CRAs are lauded for their pro-cyclical rating adjustments, demonstrating stability by consistently reflecting the true risk during economic growth and downturns.
c. CRAs have been criticized for their lack of transparency, conflicts of interest due to their revenue models, the pro-cyclical nature of their ratings, and inadequate predictive power, as highlighted by the GFC.
d. CRAs' conservative approach to rating debt issuances has been universally acclaimed. Their reluctance to issue high ratings contributes to mitigating the growth of systemic credit bubbles.

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