The Insurance Regulatory Information System is the mechanism developed by the National Association of Insurance Commissioners (NAIC) to assist states in overseeing the financial condition of insurance companies.
The IRIS ratios are a set of ratios designed to measure solvency and liquidity. They are calculated from insurers' annual statements that are filed with the NAIC, and insurers that fail one or more tests can be placed under the supervision of their domicile regulator.