Information disclosure and the feedback effect in capital markets*

Are more informative credit ratings always preferred and how should regulators intervene to promote investment efficiency? To answer these questions, we develop a model in which a manager seeks financing for a project. The main frictions are that the manager is privately informed about the project's quality and cannot commit not to divert resources away from it. This setting gives rise to a feedback effect in which creditors' beliefs about whether the manager diverts resources can become self-fulfilling. A critical consequence of this feedback effect is that more precise ratings can be detrimental for investment efficiency. Intuitively, by revealing that a firm is of worse quality and increasing its cost of finance, more informative ratings strengthen the manager's incentive to withdraw resources away from the project and default. We show that the regulation of credit rating agencies should be lenient during good times and strict during bad times.