The annualised rate of return (ARR) is geometric, time-weighted, and calculated by compounding index-level period returns. The measure gives an equal weight to each period. 
is reported in various horizons: the current quarter, one year, three years, five years, ten years, and the rate since the inception of the index.
where:
is the annualised rate of return for a given period of time n.
denotes the quarterly total investment return of the index.
n denotes the given time period.