Internal rating during and after the crisis

Ratings are increasing their functions (origination of credit, control, determination of regulatory capital, supporting accounting valuations) in full harmony with the more general development of risk management. In parallel also increases the difficulty of rating to make compatible purposes that are often not aligned and sometimes even contrasting, with a consequent risk of distortion in the development of systems and in its application.There are three aspects to face with: technical models, organizational terms of ratings, the response of supervision authorities to the question of unicity of ratings for management and regulation purposes.