The fund, under normal circumstances, invests at least 80% of its net assets in financial instruments, such as swap agreements, securities of the index, and ETFs that track the index and other financial instruments that provide daily leveraged exposure to the index or to ETFs that track the index. The index is a market value weighted index that includes publicly issued U.S. Treasury securities that have a remaining maturity of greater than 20 years. The fund is non-diversified.