The Fund seeks to track the investment results of the Markit iBoxx USD Liquid High Yield Index (the Underlying Index), which is a rules-based index consisting of U.S. dollar-denominated, high yield (as determined by Markit Indices Limited (the Index Provider or Markit)) corporate bonds for sale in the U.S. The Underlying Index is designed to provide a broad representation of the U.S. dollar-denominated liquid high yield corporate bond market. The Underlying Index is a modified market-value weighted index with a cap on each issuer of 3 percent. There is no limit to the number of issues in the Underlying Index. As of February 29, 2024, the Underlying Index included approximately 1,187 constituents. As of February 29, 2024, a significant portion of the Underlying Index is represented by securities of companies in the consumer services and industrials industries or sectors. The components of the Underlying Index are likely to change over time.