The fund tracks an index that primarily invests in investment grade securities rated BBB or higher and that have a maturity of 1 to 5 years. Only securities issued by Canadian corporations are eligible for inclusion, as long as they meet credit rating and maturity requirements. Selected securities are then placed into five maturity buckets of 1-1.99 years, 2-2.99 years, 3-3.99 years 4-4.99 years, and 5-5.99 years, and are equally weighted within their buckets. On each annual rebalancing, the bonds from each maturity roll out to the next lower bucket. Bonds with a remaining maturity of less than one year are sold, with the proceeds being used to invest in the longest maturity bucket.