U.S. Treasury funds include T-bills, Treasury notes or Treasury bonds, according to the T. Rowe Price website. The U.S. government backs these securities with its full faith and credit, making them a good choice for lower-risk investment. The length until maturity and the expected return vary.
T-bills have maturities of less than a year, Treasury notes mature in two to 10 years, and Treasury bonds have maturities of 10 years or longer. Investors should define their investment goals in order to choose a fund that best reflects the desired return and level of risk, says T. Rowe Price. Funds placed in U.S. Treasury securities are high-quality, safe investments with very little likelihood of default.