TYA is actively managed, yet aims to either match or outperform an index - the ICE US Treasury 20+ Year Index. The index consists of only USD-denominated, Treasury securities with term to maturity of greater than 20 years. TYA gains its exposure primarily through the use of US Treasury futures, call options, and put options, Treasury ETFs, and other government securities. The fund may also hold cash and cash-like instruments or short-term investment-grade debt securities to collateralize its derivatives investment. TYA seeks to pursue its objective for just a calendar quarter, not for any other period. As such, the fund performs quarterly rebalancing.