The investment seeks to track the investment results (before fees and expenses) of the ICE BofAML US Taxable Municipal Securities Plus Index. The fund generally will invest at least 80% of its total assets in securities that comprise the index. ICE Data Indices, LLC, oversees the underlying index, which is designed to measure the performance of U.S. dollar-denominated taxable municipal debt publicly issued by U.S. states and territories, and their political subdivisions, in the U.S. market.