The investment seeks to replicate the price and yield performance of the Barclays Capital Municipal Custom High Yield Composite index. The fund invests at least 80% of assets in securities that comprise the index. The index is comprised of publicly traded municipal bonds that cover the U.S. dollar denominated high yield long-term tax-exempt bond market. It may concentrate its investments in a particular industry or group of industries to the extent that the High Yield Index concentrates in an industry or group of industries. The fund is non-diversified.