Observations

Sep 2026: 3.09

Updated: Oct 1, 2026 3:16 PM CDT

Units:

Percent,

Not Seasonally Adjusted

Frequency:

Monthly

Notes

Title	Release Dates

Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Quoted on an Investment Basis, Inflation-Indexed	2010-03-01	2026-10-01

Source

Board of Governors of the Federal Reserve System (US)	2010-03-01	2026-10-01

Release

H.15 Selected Interest Rates	2010-03-01	2026-10-01

Units

Percent	2010-03-01	2026-10-01

Frequency

Monthly	2010-03-01	2026-10-01

Seasonal Adjustment

Not Seasonally Adjusted	2010-03-01	2026-10-01

Notes

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).	2010-03-01	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	2026-10-01

Release Tables

H.15 Selected Interest Rates