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Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed (DFII30)

Observations

2026-08-20: 2.95
Updated: Aug 21, 2026 3:16 PM CDT
2026-08-20:  2.95  
2026-08-19:  2.94  
2026-08-18:  3.03  
2026-08-17:  3.06  
2026-08-14:  3.00  

Units:

Percent,
Not Seasonally Adjusted

Frequency:

Daily

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Notes

Title Release Dates
30-Year Treasury Inflation-Indexed Security, Constant Maturity 2010-03-02 2014-04-01
Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed 2014-04-02 2026-08-21
 
Source    
Board of Governors of the Federal Reserve System (US) 2010-03-02 2026-08-21
 
Release    
H.15 Selected Interest Rates 2010-03-02 2026-08-21
 
Units    
Percent 2010-03-02 2026-08-21
 
Frequency    
Daily 2010-03-02 2026-08-21
 
Seasonal Adjustment    
Not Seasonally Adjusted 2010-03-02 2026-08-21
 
Notes    
For further information regarding treasury constant maturity data, please refer to http://www.federalreserve.gov/releases/h15/current/h15.pdf and http://www.treasury.gov/resource-center/data-chart-center/interest-rates/Pages/yieldmethod.aspx.

2010-03-02 2014-04-01
For further information regarding treasury constant maturity data, please refer to the H.15 Statistical Release notes (https://www.federalreserve.gov/releases/h15/default.htm) and the Treasury Yield Curve Methodology (https://home.treasury.gov/policy-issues/financing-the-government/interest-rate-statistics/treasury-yield-curve-methodology).

2014-04-02 2025-01-06
H.15 Statistical Release notes (https://www.federalreserve.gov/releases/h15/default.htm) and the Treasury Yield Curve Methodology (https://home.treasury.gov/policy-issues/financing-the-government/interest-rate-statistics/treasury-yield-curve-methodology).

For questions on the data, please contact the data source (https://www.federalreserve.gov/apps/ContactUs/feedback.aspx?refurl=/releases/h15/%). For questions on FRED functionality, please contact us here (https://fred.stlouisfed.org/contactus/).

2025-01-07 2026-08-21

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H.15 Selected Interest Rates

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Treasury Inflation-Indexed Securities Treasury Constant Maturity Interest Rates Money, Banking, & Finance

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Treasury Inflation-Indexes Securities (TIPS) 30-Year Maturity H.15 Selected Interest Rates Treasury Securities Interest Rate Interest Daily Real Board of Governors Rate Nation Public Domain: Citation Requested United States of America Not Seasonally Adjusted