Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed
DFII30 • Economic Data from Federal Reserve Economic Data (FRED)
Latest Value
2.57
Year-over-Year Change
-1.15%
Date Range
10/7/2021 - 8/6/2025
Summary
The DFII30 tracks the 30-year inflation-indexed Treasury yield, representing the long-term real interest rate investors expect after accounting for inflation. This metric provides critical insight into market expectations of future economic conditions and investor sentiment about long-term economic stability.
Analysis & Context
This economic indicator provides valuable insights into current market conditions and economic trends. The data is updated regularly by the Federal Reserve and represents one of the most reliable sources for economic analysis.
Understanding this metric helps economists, policymakers, and investors make informed decisions about economic conditions and future trends. The interactive chart above allows you to explore historical patterns and identify key trends over time.
About This Dataset
This trend measures the theoretical return on 30-year Treasury Inflation-Protected Securities (TIPS) that are adjusted for expected inflation rates. Economists use this indicator to understand market expectations of future real interest rates and long-term economic growth potential.
Methodology
The yield is calculated daily by the U.S. Treasury based on trading prices of inflation-indexed securities in the secondary market.
Historical Context
Policymakers and investors use this metric to assess long-term economic expectations, inform investment strategies, and gauge potential inflationary pressures.
Key Facts
- Represents real yield after accounting for expected inflation
- Provides insight into long-term market expectations
- Critical for institutional investors and economic forecasting
FAQs
Q: What does the DFII30 actually measure?
A: It measures the real yield of 30-year Treasury Inflation-Protected Securities, showing the expected return after accounting for inflation.
Q: Why are inflation-indexed yields important?
A: They provide a clear picture of investor expectations about future economic conditions and real investment returns.
Q: How is this different from standard Treasury yields?
A: Unlike standard yields, DFII30 adjusts for expected inflation, giving a more accurate representation of real investment returns.
Q: How do policymakers use this data?
A: Central banks and economic planners use this metric to understand market expectations and inform monetary policy decisions.
Q: How often is this data updated?
A: The DFII30 is typically updated daily during standard market trading hours, reflecting current market conditions.
Similar DFII Trends
Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Quoted on an Investment Basis
DGS30
Market Yield on U.S. Treasury Securities at 3-Month Constant Maturity, Quoted on an Investment Basis
DGS3MO
Market Yield on U.S. Treasury Securities at 10-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed
DFII10
Market Yield on U.S. Treasury Securities at 5-Year Constant Maturity, Quoted on an Investment Basis
DGS5
Market Yield on U.S. Treasury Securities at 1-Year Constant Maturity, Quoted on an Investment Basis
DGS1
Market Yield on U.S. Treasury Securities at 6-Month Constant Maturity, Quoted on an Investment Basis
DGS6MO
Citation
U.S. Federal Reserve, Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed [DFII30], retrieved from FRED.
Last Checked: 8/1/2025