Actuarial Standard of Practice No. 13, Trending Procedures in Property/Casualty Insurance Ratemaking

This standard of practice provides a basis for assessing procedures appropriate for estimating future expected values by analyzing historical data and other relevant information. The historical data to be considered for analysis are those referred to in the Statement of Principles Regarding Property and Casualty Insurance Ratemaking of the Casualty Actuarial Society (CAS).