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1-Month Treasury Yield

Daily U.S. Treasury par yield curve rate for the 1-month maturity.
Latest observation
4.07%
Oct 28, 2026
Latest
4.07%
Oct 28, 2026
Previous observation
4.10%
Oct 27, 2026
Change from previous
-0.03 pp
Latest minus previous observation
History high
6.02%
History low
0.00%
History mean
1.73%

Historical chart

-2%0%2%4%6%8%20182020202220242026
Oct 28, 20264.07%Use ← and → to inspect observations; Home and End jump to the range boundaries.
U.S. Department of the Treasury. Observation periods are preserved as published.
10Y spans 2,499 retained observations from Oct 28, 2016 through Oct 28, 2026, using 260 representative source observations. No values are interpolated. Full retained history includes 6,313 retained observations from Jul 31, 2001 through Oct 28, 2026. Checked against U.S. Department of the Treasury through Oct 28, 2026. Latest published observation is within the expected freshness window (1 calendar day old). This page does not imply intraday or real-time data.

Observation history

Table shows the most recent 100 observations.
1-Month Treasury observations
PeriodValue
Oct 28, 20264.07%
Oct 27, 20264.10%
Oct 26, 20264.11%
Oct 23, 20264.11%
Oct 22, 20264.11%
Oct 21, 20264.09%
Oct 20, 20264.10%
Oct 19, 20264.11%
Oct 16, 20264.12%
Oct 15, 20264.17%
Oct 14, 20264.11%
Oct 13, 20264.10%
Oct 9, 20264.13%
Oct 8, 20264.14%
Oct 7, 20264.07%
Oct 6, 20264.06%
Oct 5, 20264.05%
Oct 2, 20264.04%
Oct 1, 20264.06%
Sep 30, 20264.02%
Sep 29, 20264.04%
Sep 28, 20264.04%
Sep 25, 20264.04%
Sep 24, 20264.01%
Sep 23, 20263.99%
Sep 22, 20263.97%
Sep 21, 20263.96%
Sep 18, 20263.97%
Sep 17, 20263.97%
Sep 16, 20263.96%
Sep 15, 20263.93%
Sep 14, 20263.94%
Sep 11, 20263.93%
Sep 10, 20263.91%
Sep 9, 20263.81%
Sep 8, 20263.81%
Sep 4, 20263.79%
Sep 3, 20263.83%
Sep 2, 20263.83%
Sep 1, 20263.85%
Aug 31, 20263.85%
Aug 28, 20263.84%
Aug 27, 20263.81%
Aug 26, 20263.80%
Aug 25, 20263.79%
Aug 24, 20263.79%
Aug 21, 20263.80%
Aug 20, 20263.80%
Aug 19, 20263.77%
Aug 18, 20263.78%
Aug 17, 20263.79%
Aug 14, 20263.79%
Aug 13, 20263.79%
Aug 12, 20263.78%
Aug 11, 20263.79%
Aug 10, 20263.79%
Aug 7, 20263.79%
Aug 6, 20263.80%
Aug 5, 20263.77%
Aug 4, 20263.78%
Aug 3, 20263.79%
Jul 31, 20263.78%
Jul 30, 20263.79%
Jul 29, 20263.73%
Jul 28, 20263.76%
Jul 27, 20263.80%
Jul 24, 20263.80%
Jul 23, 20263.82%
Jul 22, 20263.76%
Jul 21, 20263.75%
Jul 20, 20263.72%
Jul 17, 20263.73%
Jul 16, 20263.76%
Jul 15, 20263.73%
Jul 14, 20263.73%
Jul 13, 20263.73%
Jul 10, 20263.71%
Jul 9, 20263.72%
Jul 8, 20263.67%
Jul 7, 20263.69%
Jul 6, 20263.69%
Jul 2, 20263.70%
Jul 1, 20263.67%
Jun 30, 20263.70%
Jun 29, 20263.71%
Jun 26, 20263.70%
Jun 25, 20263.70%
Jun 24, 20263.66%
Jun 23, 20263.65%
Jun 22, 20263.66%
Jun 18, 20263.69%
Jun 17, 20263.68%
Jun 16, 20263.67%
Jun 15, 20263.69%
Jun 12, 20263.69%
Jun 11, 20263.69%
Jun 10, 20263.69%
Jun 9, 20263.69%
Jun 8, 20263.70%
Jun 5, 20263.71%
Browse complete paginated history →

Source & methodology

Treasury publishes this 1-month constant-maturity par yield. Grizzly Bulls preserves official observations without filling unpublished dates.

Dataset: Daily Treasury Par Yield Curve Rates.

Unit: Percent. Frequency: Business days.

Expected refresh: Each U.S. business day after Treasury publishes the daily curve. History target: 2001 onward.

Revision behavior: Routine source revision policy not documented. Treasury does not document a routine revision schedule for this daily curve. Grizzly Bulls refreshes retained history from the current official Treasury feed. Read revision methodology.

Vintage: Latest-known retained history. This page does not preserve prior publication vintages.

Source accessed: Oct 29, 2026.

View the source series at U.S. Department of the Treasury · Read the source methodology

Data API

This chart is available to view, but its data is not currently offered through the public JSON API. Display rights and API redistribution rights are different. See available API datasets.

Cite & share

Grizzly Bulls. "1-Month Treasury Yield." Data source: U.S. Department of the Treasury, Daily Treasury Par Yield Curve Rates. Updated through October 28, 2026. https://grizzlybulls.com/charts/1-month-treasury-yield

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