The fund tracks an index that primarily invests in investment grade debt issued by Canadian government entities rated A or higher and that have a maturity of more than 10 years. To be eligible, securities must be 1) within 10 years of their issue date and 2) have recorded at least 20 trades of size 500k or have an annual trade volume of 60 individual trades of 500k or higher and 15 individual trades in the last quarter. Resulting portfolio holdings are weighted by market value. The index is rebalanced on a daily basis in order to account for any new issues or to remove any issues due to a rating downgrade or a decline in effective term to maturity below 10 years and it is rebalanced quarterly to remove any issues that do not meet the liquidity criteria.