Mutual fund scheme performance must be benchmarked to Total Return Index; use composite CAGR where TRI is unavailable. Performance benchmarks for mutual fund schemes must be aligned with the scheme's investment objective and measured using the Total Return Index (TRI). If TRI data do not cover the entire history of a scheme, funds must compute a composite CAGR combining PRI values for the earlier period and TRI values thereafter, using the prescribed formula and disclosing the date ranges used. This requirement applies to all schemes from February 1, 2018.