To track the performance of FTSE GDP-Adjusted World Government Bond Index, and to minimize the tracking error between the net asset value of the Sub-Fund and the performance of the Index. The Sub-Fund intends to implement a sampled replication model in order to track the performance of the Index and it is therefore not expected that the Sub-Fund will hold each and every underlying component of the Index at all times or hold them in the same proportion as their weightings in the Index.