U.S. Treasury par yield curve rates, daily since 1990

Daily U.S. Treasury par yield curve rates for every published maturity from 1 month to 30 years, as published by the U.S. Department of the Treasury. One row per business day.

9,199 rows15 columns Updated 6 h ago Public domain (U.S. Government work)

Loading all 9,199 rows…

Date

1 month

6 weeks

2 months

3 months

4 months

6 months

1 year

Oct 8, 2026

4.14%

4.13%

4.23%

4.29%

4.3%

4.44%

Oct 7, 2026

4.07%

4.13%

4.14%

4.22%

4.28%

4.42%

Oct 6, 2026

4.06%

4.12%

4.13%

4.21%

4.26%

4.28%

4.46%

Oct 5, 2026

4.05%

4.1%

4.13%

4.22%

4.27%

4.3%

4.47%

Oct 2, 2026

4.04%

4.09%

4.11%

4.19%

4.26%

4.27%

4.46%

Oct 1, 2026

4.06%

4.1%

4.13%

4.17%

4.26%

4.27%

4.44%

Sep 30, 2026

4.02%

4.13%

4.16%

4.2%

4.29%

4.33%

4.54%

Sep 29, 2026

4.04%

4.14%

4.18%

4.25%

4.3%

4.36%

4.58%

Sep 28, 2026

4.04%

4.14%

4.2%

4.28%

4.33%

4.41%

4.59%

Sep 25, 2026

4.04%

4.14%

4.2%

4.24%

4.32%

4.33%

4.5%

Sep 24, 2026

4.01%

4.1%

4.18%

4.24%

4.33%

4.34%

4.51%

Sep 23, 2026

3.99%

4.07%

4.1%

4.19%

4.3%

4.31%

4.49%

Sep 22, 2026

3.97%

4.04%

4.09%

4.16%

4.26%

4.43%

Sep 21, 2026

3.96%

4.02%

4.1%

4.17%

4.26%

4.27%

4.45%

Sep 18, 2026

3.97%

3.98%

4.1%

4.14%

4.24%

4.44%

Sep 17, 2026

3.97%

3.98%

4.09%

4.12%

4.23%

4.2%

4.4%

Sep 16, 2026

3.96%

4.07%

4.14%

4.24%

4.22%

4.45%

Sep 15, 2026

3.93%

4.06%

4.11%

4.19%

4.17%

4.39%

Sep 14, 2026

3.94%

4.06%

4.11%

4.18%

4.37%

Sep 11, 2026

3.93%

3.99%

4.05%

4.07%

4.15%

4.12%

4.35%

Sep 10, 2026

3.91%

3.93%

4.01%

4.11%

4.07%

4.28%

Sep 9, 2026

3.81%

3.88%

3.93%

3.95%

4.06%

4.01%

4.17%

Sep 8, 2026

3.81%

3.88%

3.91%

3.94%

4.02%

4.15%

Sep 4, 2026

3.79%

3.83%

3.9%

3.91%

3.98%

4.13%

Sep 3, 2026

3.83%

3.82%

3.91%

3.89%

3.99%

3.95%

4.11%

Sep 2, 2026

3.83%

3.87%

3.89%

3.92%

4.02%

4.16%

Sep 1, 2026

3.85%

3.88%

3.89%

3.92%

3.97%

4.18%

Aug 31, 2026

3.85%

3.86%

3.88%

3.91%

3.96%

3.99%

4.16%

Aug 28, 2026

3.84%

3.83%

3.86%

3.9%

3.94%

4.02%

4.15%

Aug 27, 2026

3.81%

3.79%

3.81%

3.84%

3.88%

3.94%

4.04%

Aug 26, 2026

3.8%

3.78%

3.8%

3.85%

3.88%

3.94%

4.02%

Aug 25, 2026

3.79%

3.78%

3.8%

3.86%

3.89%

3.95%

4.01%

Aug 24, 2026

3.79%

3.78%

3.8%

3.87%

3.9%

3.96%

4.04%

Aug 21, 2026

3.8%

3.77%

3.8%

3.88%

3.9%

3.95%

4.03%

Aug 20, 2026

3.8%

3.77%

3.79%

3.87%

3.88%

3.94%

3.99%

Aug 19, 2026

3.77%

3.81%

3.86%

3.88%

3.94%

Aug 18, 2026

3.78%

3.82%

3.86%

3.88%

3.94%

3.99%

Aug 17, 2026

3.79%

3.8%

3.82%

3.87%

3.89%

3.95%

Aug 14, 2026

3.79%

3.8%

3.81%

3.86%

3.88%

3.95%

3.98%

Aug 13, 2026

3.79%

3.81%

3.87%

3.88%

3.94%

3.97%

Aug 12, 2026

3.78%

3.79%

3.8%

3.87%

3.89%

3.97%

Aug 11, 2026

3.79%

3.82%

3.83%

3.89%

3.9%

3.99%

4.03%

Aug 10, 2026

3.79%

3.8%

3.84%

3.89%

3.91%

4.04%

Aug 7, 2026

3.79%

3.83%

3.87%

3.89%

3.96%

4.01%

Aug 6, 2026

3.8%

3.84%

3.9%

3.92%

3.99%

4.06%

Aug 5, 2026

3.77%

3.79%

3.84%

3.89%

3.91%

3.98%

4.03%

Aug 4, 2026

3.78%

3.8%

3.85%

3.89%

3.91%

4.04%

Aug 3, 2026

3.79%

3.82%

3.87%

3.91%

3.94%

4.02%

4.07%

Jul 31, 2026

3.78%

3.8%

3.85%

3.83%

3.92%

3.98%

4.08%

Jul 30, 2026

3.79%

3.8%

3.84%

3.82%

3.92%

3.98%

4.04%

Columns

Stable keys — use them in the API, SQL and code

Key	Name	Type	Description
date	Date	date	Business day the rates apply to.
yield_1m	1 month	number · %	Par yield at 1-month constant maturity; published from 31 July 2001.
yield_1_5m	6 weeks	number · %	Par yield at 1.5-month (6-week) constant maturity; published from 18 February 2025.
yield_2m	2 months	number · %	Par yield at 2-month constant maturity; published from 16 October 2018.
yield_3m	3 months	number · %	Par yield at 3-month constant maturity.
yield_4m	4 months	number · %	Par yield at 4-month constant maturity; published from 19 October 2022.
yield_6m	6 months	number · %	Par yield at 6-month constant maturity.
yield_1y	1 year	number · %	Par yield at 1-year constant maturity.
yield_2y	2 years	number · %	Par yield at 2-year constant maturity.
yield_3y	3 years	number · %	Par yield at 3-year constant maturity.
yield_5y	5 years	number · %	Par yield at 5-year constant maturity.
yield_7y	7 years	number · %	Par yield at 7-year constant maturity.
yield_10y	10 years	number · %	Par yield at 10-year constant maturity.
yield_20y	20 years	number · %	Par yield at 20-year constant maturity; Treasury reinstated it on 1 October 1993.
yield_30y	30 years	number · %	Par yield at 30-year constant maturity (not published 18 February 2002 – 8 February 2006).

About this data

Source: U.S. Department of the Treasury — Daily Treasury Par Yield Curve Rates
License: Public domain (U.S. Government work)
Required attribution: Source: U.S. Department of the Treasury.
Updated: Oct 9, 2026 03:18 UTC
Refresh: daily
Rows: 9,199
Size (JSON): 756 KB
Notes: Yields are in percent per year on a bond-equivalent basis, read from Treasury's daily par yield curve, which is based on indicative bid-side prices of the most recently auctioned Treasury securities obtained by the Federal Reserve Bank of New York at about 3:30 pm New York time. A blank cell means Treasury did not publish that maturity on that date (several maturities were introduced or suspended over time). Days with no published rates are omitted.

Use this data

import pandas as pd

df = pd.read_csv("https://aidb.si/d/us-treasury-yields.csv")
print(df.head())

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