Why a rating agency should be concerned about the survival of the company it’s assessing

MIT Sloan Assoc. Prof. Gustavo Manso

My latest paper* focuses on the difficulties that rating agencies face in setting a credit score that accurately reflects the credit quality of a borrower, but also takes into account the effect that score will have on the borrower’s credit quality in the future. When a rating agency cuts a given company’s credit rating, investor confidence in that company’s ability to meet its debt obligations is undermined, making it very difficult for the company to raise cash. The downgrade often becomes a self-fulfilling prophecy.

In my paper I talk about the ideal accurate credit rating environment. It’s important to note that there may be several possible ratings that are accurate for a particular firm or country at any point in time, but some of these ratings lead to more distress than others. I believe rating agencies ought to be careful to select the best rating: one that provides an accurate portrayal of the company’s credit worthiness, but also takes into account the continued existence of the company in question. These ratings – where the agencies have a small bias towards the ultimate survival of the companies they evaluate – allow the companies to borrow money at a lower interest rate and therefore improve their chances of withstanding any financial shocks that may arise.

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