All participants including regulators, credit rating agencies (CRAs), corporate, banks and borrowers need to work jointly towards a better system of credit risk assessment and monitoring, it said.
"A holistic regulatory framework encompassing participation from all stakeholders in credit rating ecosystem is imperative to improve efficacy of CRAs and effective credit risk assessment and monitoring in India," said the joint study by Assocham and PwC.
"The banks, apart from putting up a strong regulatory framework, should also upgrade their skills for greater due diligence to effectively evaluate the ratings given by the CRAs", it said.
Banks should treat credit rating only as an "opinion" and not as the "gospel truth", it added.
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Information generated by ratings should be used in conjunction of banks' credit risk framework to decide on suitability of loan exposure, said the study.
That, it said, will reduce NPAs systemically and avoid panic and knee-jerk reactions.
Considering that financial education in India is still at a nascent stage, the ratings should be displayed on a common website for comparison, the report suggested.