The investment seeks to track the performance of the Bloomberg Barclays US Aggregate Total Return Index. Under normal circumstances, in seeking to track the index's performance, the fund generally purchases a representative sample of the securities comprising the index. By using a sampling process, it typically will not invest in all of the securities in the index. The Bloomberg Barclays US Aggregate Total Return Index is designed to measure the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market. The fund is non-diversified.