The investment seeks to replicate as closely as possible, before fees and expenses, the price and yield performance of The BofA Merrill Lynch US Fallen Angel High Yield Index (the "Fallen Angel Index"). The fund normally invests at least 80% of its total assets in securities that comprise the fund's benchmark index. The Fallen Angel Index is comprised of below investment grade corporate bonds denominated in U.S. dollars that were rated investment grade at the time of issuance. The fund is non-diversified.