The fund seeks the highest level of income consistent with maximum credit protection.
The fund invests at least 85% of its net assets in U.S. Treasury securities, which are backed by the full faith and credit of the federal government. The remainder is invested in other securities backed by the full faith and credit of the U.S. government. The portfolio's weighted average maturity is expected to vary between 15 and 20 years, but may range from 10 to 30 years.
Click on the risk spectrum below to view the funds in that category
All investments are subject to market risk, including the possible loss of principal. The fund should have minimal credit risk because it invests only in securities backed by the federal government and other investments involving such securities. The primary source of risk is the possibility of rising interest rates, which generally cause bond prices and a bond fund's share price to fall. Long-term bonds are subject to the greatest price swings because the longer the maturity, the greater the price decline when rates rise and the greater the price increase when rates fall. Unlike the Treasury securities in which the fund invests, an investment in the fund is not insured or guaranteed by the U.S. government.
**This chart displays relative risk of each U.S. mutual fund listed using standard deviation of returns. Those values are provided in the bars at the top of the chart.
Methodology: We evaluate the standard deviation and its resulting placement within a specific risk/return category on an annual basis. A fund is generally placed in a risk/return category based on the 10-year standard deviation of its performance.
If a fund is less than 10 years old, the actual fund performance history is supplemented with the primary prospectus benchmark history to obtain a full 10-year history, or longest time period available up to 10 years.
For an Asset Allocation fund with less than 10 years of performance history, sub-strategy returns are used.
When a sub-strategy is less than 10 years old, the actual sub-strategy performance history is supplemented with benchmark history to obtain a full 10-year history, or longest time period available up to 10 years.
Risk return categories overlap; a fund with a standard deviation in the overlap between two categories, denoted by a plus (+), is placed so that its risk categorization is better aligned with anticipated return characteristics an investor may experience going forward at the discretion of T Rowe Price.
When a fund has a cash-like benchmark, denoted by a double plus (++), its standard deviation is estimated using only available fund returns. If the fund is less than 10 years old, benchmark returns are not used to obtain a full 10-year history because they would artificially suppress the volatility estimate.
All investments are subject to market risk, including the possible loss of principal. Standard deviation of returns, a measure of price volatility, is one measure of risk. Please consult the funds' prospectuses for a more complete discussion of the funds' risks.
See Glossary for additional details on all data elements.
The mutual funds referred to in this website are offered and sold only to persons residing in the United States and are offered by prospectus only. The prospectuses include investment objectives, risks, fees, expenses, and other information that you should read and consider carefully before investing. Download a prospectus.