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"CREDIT AGENCIES"
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The Effectiveness of Credit Rating Agency Monitoring
This study investigates how differences between the rating agencies' initial (at the date of debt issuance) and subsequent (post-issuance) monitoring incentives affect securitizing banks' rating accuracy. We hypothesize that the agencies have stronger incentives to monitor issuers when providing initial versus post-issuance ratings. We document that initial ratings are positively associated with off-balance sheet securitized assets and incrementally associated with on-balance sheet retained securities. However, subsequent ratings fail to capture current exposure to off-balance sheet securitizations. We also find that subsequent ratings reflect default risk less accurately than initial ratings. The subsequent ratings' responsiveness to default risk is worse when a bank has more off-balance sheet securitized assets. Collectively, our findings are consistent with lax post-issuance monitoring. They raise questions about the effectiveness of using ratings as an ongoing contracting mechanism and suggest that conclusions about rating accuracy could differ depending on whether researchers focus on initial versus post-issuance ratings.
Journal Article
Detecting conflicts of interest in credit rating changes: A distribution dynamics approach
In this study, we compare the adjustments of credit ratings by an investor-paid credit rating agency (CRA), represented by Egan-Jones Ratings Company, and an issuer-paid CRA, represented by Moody's Investors Service, vis-à-vis conflict of interest and reputation. A novel distribution dynamics approach is employed to compute the probability distribution and, hence, the downgrade and upgrade probabilities of a credit rating assigned by these two CRAs of different compensation systems based on the dataset of 750 U.S. issuers between 2011 and 2018, that is, after the passage of the Dodd-Frank Act. It is found that investor-paid ratings are more likely to be downgraded than issuer-paid ratings only in the lower rating grades, which is consistent with the argument that investor-paid agencies have harsher attitudes toward potentially defaulting issuers to protect their reputation. We do not find evidence that issuer-paid CRAs provide overly favorable treatments to issuers with threshold ratings, implying that reputation concerns and the Dodd-Frank regulation mitigate the conflict of interests, while issuer-paid CRAs are more concerned about providing accurate ratings.
Journal Article
Credit Scoring and Its Effects on the Availability and Affordability of Credit
The Fair and Accurate Credit Transaction Act of 2003 (the FACT Act) directed several federal agencies to conduct studies related to the credit reporting industry. A primary concern was the accuracy and fairness of the credit reporting and scoring systems. In this article, Federal Reserve System Board economists report on a study in which they examined various issues related to credit scoring, including how credit scoring has affected the availability and affordability of credit. In a responding commentary, Calvin Bradford notes flaws and deficiencies in the Federal Reserve System study.
Journal Article
Did Credit Rating Agencies Make Unbiased Assumptions on CDOs?
We compare key CDO assumptions from two departments within the same rating agency but with different financial incentives. Assumptions made by the ratings division are more favorable than those by the surveillance department. The differences are not explained by collateral switching during the ramp-up period, a long time gap between reports, nor the collapse of the CDO market in 2007 Additionally, CDOs rated with more favorable assumptions by the ratings group were more likely to be subsequently downgraded. As the useful signals from the surveillance group were seemingly ignored, these findings suggest rating agencies bias towards high ratings.
Journal Article
Consensus credit ratings: a view from banks
While the production of credit ratings has long been limited mainly to rating agencies (CRAs), recent years have seen the growing popularity of consensus credit ratings crowdsourced from banks (i.e., bank ratings). We provide the first comprehensive examination of the properties and informativeness of bank ratings relative to CRA ratings. We find that bank ratings often deviate from CRA ratings, with over 60% of firm-months having different bank and CRA ratings. These deviations contain useful information. Bank ratings improve out-of-sample prediction of defaults and CRA rating revisions and explain the cross-section of credit spreads. However, bank ratings do not improve out-of-sample prediction of credit excess returns, indicating that current prices incorporate bank rating information. Overall our findings suggest that bank ratings are a useful supplement to traditional credit ratings.
Journal Article
Credit Ratings as Coordination Mechanisms
In this article, we provide a novel rationale for credit ratings. The rationale that we propose is that credit ratings serve as a coordinating mechanism in situations where multiple equilibria can obtain. We show that credit ratings provide a \"focal point\" for firms and their investors, and explore the vital, but previously overlooked implicit contractual relationship between a credit rating agency (CRA) and a firm through its credit watch procedures. Credit ratings can help fix the desired equilibrium and as such play an economically meaningful role. Our model provides several empirical predictions and insights regarding the expected price impact of rating changes.
Journal Article