Under normal market conditions, the fund invests at least 80% of its net assets in direct obligations of the U.S. Treasury, including Treasury bonds, bills, notes and Treasury Inflation-Protected Securities (TIPS), and investments that provide exposure to direct obligations of the U.S. Treasury. The fund may invest in U.S. Treasury securities of any maturity and intends to primarily focus on U.S. Treasury securities with a remaining maturity of between 1-30 years.