Treasury bond

912810SU3 · 1.875% due February 15, 2051

Original term
30-Year
Maturity
Feb 15, 2051
Coupon
1.875%
Pays
Semi-Annual
Dated
Feb 15, 2021
First coupon
Aug 15, 2021
Priced through
Sep 9, 2026
Analyzed through
Sep 9, 2026

Statement of August 31, 2026

Amount outstanding
$88.19bn
Held stripped
$18.95bn
Share stripped
21.49%

Stripped par is held as separate interest and principal components rather than as whole securities. The Safe Rate indices deliberately do not deduct it, and the whole-market figure is published so that decision can be argued with. Market statistics.

Amount outstanding as reported by Treasury, in its Monthly Statement of the Public Debt. The Safe Rate indices weight on a different figure, float-adjusted original par, and the two are not comparable security by security. The index figures are published per holding.

Risk, September 9, 2026

Yield to maturity
5.380%
Modified duration
16.942 yr
DV01
0.0894
Convexity
366.681
Dirty price
52.789

Where its rate sensitivity sits

3M
6M
1Y
2Y
3Y
5Y
7Y
10Y
15Y
20Y
25Y
30Y
Sensitivity to a one basis point move at each point on the curve, in years. Concentrated in 11 of twelve buckets, summing to 17.167 years against a modified duration of 16.942.

Against the fitted curve

Priced 2.4 bp rich to the curve on that day, 21.15 cents per 100 of face.

That is -0.88 standard deviations from its own typical residual.

Yield to maturity, 1,395 observations

1%2%3%4%5%6%Feb 16, 2021Sep 9, 2026Feb 16, 2021Yield to maturity2.085%Feb 24, 2021Yield to maturity2.237%Mar 4, 2021Yield to maturity2.298%Mar 12, 2021Yield to maturity2.397%Mar 22, 2021Yield to maturity2.376%Mar 30, 2021Yield to maturity2.383%Apr 7, 2021Yield to maturity2.355%Apr 15, 2021Yield to maturity2.226%Apr 23, 2021Yield to maturity2.249%May 3, 2021Yield to maturity2.295%May 11, 2021Yield to maturity2.351%May 19, 2021Yield to maturity2.393%May 27, 2021Yield to maturity2.301%Jun 7, 2021Yield to maturity2.261%Jun 15, 2021Yield to maturity2.211%Jun 23, 2021Yield to maturity2.126%Jul 1, 2021Yield to maturity2.088%Jul 12, 2021Yield to maturity2.016%Jul 20, 2021Yield to maturity1.890%Jul 28, 2021Yield to maturity1.919%Aug 5, 2021Yield to maturity1.875%Aug 13, 2021Yield to maturity1.951%Aug 23, 2021Yield to maturity1.879%Aug 31, 2021Yield to maturity1.931%Sep 9, 2021Yield to maturity1.906%Sep 17, 2021Yield to maturity1.914%Sep 27, 2021Yield to maturity1.999%Oct 5, 2021Yield to maturity2.107%Oct 14, 2021Yield to maturity2.024%Oct 22, 2021Yield to maturity2.090%Nov 1, 2021Yield to maturity1.989%Nov 9, 2021Yield to maturity1.839%Nov 18, 2021Yield to maturity1.988%Nov 29, 2021Yield to maturity1.882%Dec 7, 2021Yield to maturity1.814%Dec 15, 2021Yield to maturity1.881%Dec 23, 2021Yield to maturity1.924%Jan 3, 2022Yield to maturity2.031%Jan 11, 2022Yield to maturity2.091%Jan 20, 2022Yield to maturity2.149%Jan 28, 2022Yield to maturity2.087%Feb 7, 2022Yield to maturity2.230%Feb 15, 2022Yield to maturity2.398%Feb 24, 2022Yield to maturity2.310%Mar 4, 2022Yield to maturity2.197%Mar 14, 2022Yield to maturity2.520%Mar 22, 2022Yield to maturity2.637%Mar 30, 2022Yield to maturity2.516%Apr 7, 2022Yield to maturity2.728%Apr 18, 2022Yield to maturity2.986%Apr 26, 2022Yield to maturity2.892%May 4, 2022Yield to maturity3.039%May 12, 2022Yield to maturity3.062%May 20, 2022Yield to maturity3.061%May 31, 2022Yield to maturity3.140%Jun 8, 2022Yield to maturity3.248%Jun 16, 2022Yield to maturity3.406%Jun 27, 2022Yield to maturity3.365%Jul 6, 2022Yield to maturity3.189%Jul 14, 2022Yield to maturity3.159%Jul 22, 2022Yield to maturity3.055%Aug 1, 2022Yield to maturity2.983%Aug 9, 2022Yield to maturity3.068%Aug 17, 2022Yield to maturity3.225%Aug 25, 2022Yield to maturity3.330%Sep 2, 2022Yield to maturity3.429%Sep 13, 2022Yield to maturity3.580%Sep 21, 2022Yield to maturity3.572%Sep 29, 2022Yield to maturity3.777%Oct 7, 2022Yield to maturity3.920%Oct 18, 2022Yield to maturity4.099%Oct 26, 2022Yield to maturity4.241%Nov 3, 2022Yield to maturity4.216%Nov 14, 2022Yield to maturity4.156%Nov 22, 2022Yield to maturity3.933%Dec 1, 2022Yield to maturity3.725%Dec 9, 2022Yield to maturity3.628%Dec 19, 2022Yield to maturity3.690%Dec 28, 2022Yield to maturity4.049%Jan 6, 2023Yield to maturity3.737%Jan 17, 2023Yield to maturity3.694%Jan 25, 2023Yield to maturity3.663%Feb 2, 2023Yield to maturity3.592%Feb 10, 2023Yield to maturity3.856%Feb 21, 2023Yield to maturity4.013%Mar 1, 2023Yield to maturity3.992%Mar 9, 2023Yield to maturity3.910%Mar 17, 2023Yield to maturity3.645%Mar 27, 2023Yield to maturity3.810%Apr 4, 2023Yield to maturity3.640%Apr 12, 2023Yield to maturity3.687%Apr 20, 2023Yield to maturity3.781%Apr 28, 2023Yield to maturity3.701%May 8, 2023Yield to maturity3.873%May 16, 2023Yield to maturity3.915%May 24, 2023Yield to maturity4.015%Jun 2, 2023Yield to maturity3.928%Jun 12, 2023Yield to maturity3.917%Jun 21, 2023Yield to maturity3.841%Jun 29, 2023Yield to maturity3.946%Jul 10, 2023Yield to maturity4.072%Jul 18, 2023Yield to maturity3.947%Jul 26, 2023Yield to maturity3.970%Aug 3, 2023Yield to maturity4.350%Aug 11, 2023Yield to maturity4.325%Aug 21, 2023Yield to maturity4.505%Aug 29, 2023Yield to maturity4.277%Sep 7, 2023Yield to maturity4.411%Sep 15, 2023Yield to maturity4.471%Sep 25, 2023Yield to maturity4.728%Oct 3, 2023Yield to maturity5.009%Oct 12, 2023Yield to maturity4.923%Oct 20, 2023Yield to maturity5.151%Oct 30, 2023Yield to maturity5.095%Nov 7, 2023Yield to maturity4.803%Nov 15, 2023Yield to maturity4.750%Nov 24, 2023Yield to maturity4.676%Dec 4, 2023Yield to maturity4.511%Dec 12, 2023Yield to maturity4.379%Dec 20, 2023Yield to maturity4.083%Dec 29, 2023Yield to maturity4.118%Jan 9, 2024Yield to maturity4.271%Jan 18, 2024Yield to maturity4.474%Jan 26, 2024Yield to maturity4.479%Feb 5, 2024Yield to maturity4.442%Feb 13, 2024Yield to maturity4.547%Feb 22, 2024Yield to maturity4.557%Mar 1, 2024Yield to maturity4.411%Mar 11, 2024Yield to maturity4.344%Mar 19, 2024Yield to maturity4.514%Mar 27, 2024Yield to maturity4.423%Apr 4, 2024Yield to maturity4.534%Apr 12, 2024Yield to maturity4.669%Apr 22, 2024Yield to maturity4.777%Apr 30, 2024Yield to maturity4.840%May 8, 2024Yield to maturity4.694%May 16, 2024Yield to maturity4.585%May 24, 2024Yield to maturity4.634%Jun 4, 2024Yield to maturity4.538%Jun 12, 2024Yield to maturity4.534%Jun 21, 2024Yield to maturity4.460%Jul 1, 2024Yield to maturity4.709%Jul 10, 2024Yield to maturity4.545%Jul 18, 2024Yield to maturity4.498%Jul 26, 2024Yield to maturity4.537%Aug 5, 2024Yield to maturity4.165%Aug 13, 2024Yield to maturity4.272%Aug 21, 2024Yield to maturity4.184%Aug 29, 2024Yield to maturity4.262%Sep 9, 2024Yield to maturity4.106%Sep 17, 2024Yield to maturity4.062%Sep 25, 2024Yield to maturity4.253%Oct 3, 2024Yield to maturity4.303%Oct 11, 2024Yield to maturity4.499%Oct 22, 2024Yield to maturity4.592%Oct 30, 2024Yield to maturity4.593%Nov 7, 2024Yield to maturity4.639%Nov 18, 2024Yield to maturity4.739%Nov 26, 2024Yield to maturity4.596%Dec 5, 2024Yield to maturity4.441%Dec 13, 2024Yield to maturity4.738%Dec 23, 2024Yield to maturity4.896%Jan 2, 2025Yield to maturity4.907%Jan 10, 2025Yield to maturity5.068%Jan 21, 2025Yield to maturity4.893%Jan 29, 2025Yield to maturity4.892%Feb 6, 2025Yield to maturity4.750%Feb 14, 2025Yield to maturity4.804%Feb 25, 2025Yield to maturity4.665%Mar 5, 2025Yield to maturity4.696%Mar 13, 2025Yield to maturity4.716%Mar 21, 2025Yield to maturity4.709%Mar 31, 2025Yield to maturity4.708%Apr 8, 2025Yield to maturity4.846%Apr 16, 2025Yield to maturity4.872%Apr 24, 2025Yield to maturity4.890%May 2, 2025Yield to maturity4.911%May 12, 2025Yield to maturity5.017%May 20, 2025Yield to maturity5.084%May 29, 2025Yield to maturity5.044%Jun 6, 2025Yield to maturity5.085%Jun 16, 2025Yield to maturity5.081%Jun 25, 2025Yield to maturity4.945%Jul 3, 2025Yield to maturity4.970%Jul 14, 2025Yield to maturity5.072%Jul 22, 2025Yield to maturity5.006%Jul 30, 2025Yield to maturity4.995%Aug 7, 2025Yield to maturity4.915%Aug 15, 2025Yield to maturity5.025%Aug 25, 2025Yield to maturity4.998%Sep 3, 2025Yield to maturity5.004%Sep 11, 2025Yield to maturity4.745%Sep 19, 2025Yield to maturity4.845%Sep 29, 2025Yield to maturity4.803%Oct 7, 2025Yield to maturity4.824%Oct 16, 2025Yield to maturity4.672%Oct 24, 2025Yield to maturity4.683%Nov 3, 2025Yield to maturity4.790%Nov 12, 2025Yield to maturity4.768%Nov 20, 2025Yield to maturity4.837%Dec 1, 2025Yield to maturity4.852%Dec 9, 2025Yield to maturity4.916%Dec 17, 2025Yield to maturity4.943%Dec 26, 2025Yield to maturity4.930%Jan 6, 2026Yield to maturity4.977%Jan 14, 2026Yield to maturity4.897%Jan 23, 2026Yield to maturity4.931%Feb 2, 2026Yield to maturity5.009%Feb 10, 2026Yield to maturity4.885%Feb 19, 2026Yield to maturity4.809%Feb 27, 2026Yield to maturity4.739%Mar 9, 2026Yield to maturity4.835%Mar 17, 2026Yield to maturity4.959%Mar 25, 2026Yield to maturity5.016%Apr 2, 2026Yield to maturity5.002%Apr 10, 2026Yield to maturity5.027%Apr 20, 2026Yield to maturity4.990%Apr 28, 2026Yield to maturity5.054%May 6, 2026Yield to maturity5.052%May 14, 2026Yield to maturity5.137%May 22, 2026Yield to maturity5.183%Jun 2, 2026Yield to maturity5.079%Jun 10, 2026Yield to maturity5.144%Jun 18, 2026Yield to maturity5.016%Jun 29, 2026Yield to maturity4.970%Jul 8, 2026Yield to maturity5.178%Jul 16, 2026Yield to maturity5.204%Jul 24, 2026Yield to maturity5.278%Aug 3, 2026Yield to maturity5.345%Aug 11, 2026Yield to maturity5.362%Aug 19, 2026Yield to maturity5.305%Aug 27, 2026Yield to maturity5.294%Sep 4, 2026Yield to maturity5.352%Sep 9, 2026Yield to maturity5.380%

Price history

1,395 trading days to Sep 9, 2026

5060708090100110Feb 16, 2021Sep 9, 2026Feb 16, 2021Close95.344Feb 24, 2021Close92.125Mar 4, 2021Close90.875Mar 12, 2021Close88.906Mar 22, 2021Close89.313Mar 30, 2021Close89.188Apr 7, 2021Close89.750Apr 15, 2021Close92.375Apr 23, 2021Close91.906May 3, 2021Close90.969May 11, 2021Close89.844May 19, 2021Close89.031May 27, 2021Close90.875Jun 7, 2021Close91.688Jun 15, 2021Close92.719Jun 23, 2021Close94.500Jul 1, 2021Close95.313Jul 12, 2021Close96.875Jul 20, 2021Close99.656Jul 28, 2021Close99.000Aug 5, 2021Close100.000Aug 13, 2021Close98.313Aug 23, 2021Close99.906Aug 31, 2021Close98.750Sep 9, 2021Close99.313Sep 17, 2021Close99.125Sep 27, 2021Close97.250Oct 5, 2021Close94.938Oct 14, 2021Close96.719Oct 22, 2021Close95.313Nov 1, 2021Close97.469Nov 9, 2021Close100.813Nov 18, 2021Close97.500Nov 29, 2021Close99.844Dec 7, 2021Close101.375Dec 15, 2021Close99.875Dec 23, 2021Close98.906Jan 3, 2022Close96.594Jan 11, 2022Close95.313Jan 20, 2022Close94.094Jan 28, 2022Close95.406Feb 7, 2022Close92.438Feb 15, 2022Close89.125Feb 24, 2022Close90.844Mar 4, 2022Close93.125Mar 14, 2022Close86.813Mar 22, 2022Close84.656Mar 30, 2022Close86.906Apr 7, 2022Close83.031Apr 18, 2022Close78.625Apr 26, 2022Close80.219May 4, 2022Close77.781May 12, 2022Close77.406May 20, 2022Close77.438May 31, 2022Close76.188Jun 8, 2022Close74.500Jun 16, 2022Close72.125Jun 27, 2022Close72.750Jul 6, 2022Close75.469Jul 14, 2022Close75.938Jul 22, 2022Close77.625Aug 1, 2022Close78.813Aug 9, 2022Close77.438Aug 17, 2022Close74.969Aug 25, 2022Close73.375Sep 2, 2022Close71.906Sep 13, 2022Close69.750Sep 21, 2022Close69.875Sep 29, 2022Close67.063Oct 7, 2022Close65.188Oct 18, 2022Close62.938Oct 26, 2022Close61.219Nov 3, 2022Close61.531Nov 14, 2022Close62.281Nov 22, 2022Close65.094Dec 1, 2022Close67.875Dec 9, 2022Close69.219Dec 19, 2022Close68.375Dec 28, 2022Close63.688Jan 6, 2023Close67.781Jan 17, 2023Close68.375Jan 25, 2023Close68.813Feb 2, 2023Close69.813Feb 10, 2023Close66.250Feb 21, 2023Close64.250Mar 1, 2023Close64.531Mar 9, 2023Close65.594Mar 17, 2023Close69.156Mar 27, 2023Close66.938Apr 4, 2023Close69.250Apr 12, 2023Close68.625Apr 20, 2023Close67.375Apr 28, 2023Close68.469May 8, 2023Close66.188May 16, 2023Close65.656May 24, 2023Close64.406Jun 2, 2023Close65.531Jun 12, 2023Close65.688Jun 21, 2023Close66.688Jun 29, 2023Close65.344Jul 10, 2023Close63.781Jul 18, 2023Close65.375Jul 26, 2023Close65.094Aug 3, 2023Close60.500Aug 11, 2023Close60.813Aug 21, 2023Close58.781Aug 29, 2023Close61.406Sep 7, 2023Close59.875Sep 15, 2023Close59.219Sep 25, 2023Close56.438Oct 3, 2023Close53.594Oct 12, 2023Close54.469Oct 20, 2023Close52.250Oct 30, 2023Close52.813Nov 7, 2023Close55.750Nov 15, 2023Close56.313Nov 24, 2023Close57.125Dec 4, 2023Close58.938Dec 12, 2023Close60.438Dec 20, 2023Close63.969Dec 29, 2023Close63.563Jan 9, 2024Close61.750Jan 18, 2024Close59.438Jan 26, 2024Close59.406Feb 5, 2024Close59.844Feb 13, 2024Close58.688Feb 22, 2024Close58.594Mar 1, 2024Close60.250Mar 11, 2024Close61.031Mar 19, 2024Close59.125Mar 27, 2024Close60.156Apr 4, 2024Close58.938Apr 12, 2024Close57.500Apr 22, 2024Close56.375Apr 30, 2024Close55.750May 8, 2024Close57.281May 16, 2024Close58.469May 24, 2024Close57.969Jun 4, 2024Close59.031Jun 12, 2024Close59.094Jun 21, 2024Close59.938Jul 1, 2024Close57.250Jul 10, 2024Close59.031Jul 18, 2024Close59.563Jul 26, 2024Close59.156Aug 5, 2024Close63.438Aug 13, 2024Close62.188Aug 21, 2024Close63.250Aug 29, 2024Close62.344Sep 9, 2024Close64.219Sep 17, 2024Close64.781Sep 25, 2024Close62.500Oct 3, 2024Close61.938Oct 11, 2024Close59.750Oct 22, 2024Close58.750Oct 30, 2024Close58.750Nov 7, 2024Close58.281Nov 18, 2024Close57.250Nov 26, 2024Close58.781Dec 5, 2024Close60.500Dec 13, 2024Close57.313Dec 23, 2024Close55.719Jan 2, 2025Close55.625Jan 10, 2025Close54.063Jan 21, 2025Close55.813Jan 29, 2025Close55.844Feb 6, 2025Close57.313Feb 14, 2025Close56.781Feb 25, 2025Close58.250Mar 5, 2025Close57.938Mar 13, 2025Close57.750Mar 21, 2025Close57.844Mar 31, 2025Close57.875Apr 8, 2025Close56.469Apr 16, 2025Close56.219Apr 24, 2025Close56.063May 2, 2025Close55.875May 12, 2025Close54.844May 20, 2025Close54.219May 29, 2025Close54.625Jun 6, 2025Close54.250Jun 16, 2025Close54.313Jun 25, 2025Close55.656Jul 3, 2025Close55.438Jul 14, 2025Close54.469Jul 22, 2025Close55.125Jul 30, 2025Close55.250Aug 7, 2025Close56.063Aug 15, 2025Close55.000Aug 25, 2025Close55.281Sep 3, 2025Close55.250Sep 11, 2025Close57.875Sep 19, 2025Close56.875Sep 29, 2025Close57.313Oct 7, 2025Close57.125Oct 16, 2025Close58.719Oct 24, 2025Close58.625Nov 3, 2025Close57.531Nov 12, 2025Close57.781Nov 20, 2025Close57.094Dec 1, 2025Close56.969Dec 9, 2025Close56.344Dec 17, 2025Close56.094Dec 26, 2025Close56.250Jan 6, 2026Close55.813Jan 14, 2026Close56.625Jan 23, 2026Close56.313Feb 2, 2026Close55.563Feb 10, 2026Close56.813Feb 19, 2026Close57.594Feb 27, 2026Close58.344Mar 9, 2026Close57.375Mar 17, 2026Close56.156Mar 25, 2026Close55.625Apr 2, 2026Close55.781Apr 10, 2026Close55.563Apr 20, 2026Close55.938Apr 28, 2026Close55.344May 6, 2026Close55.375May 14, 2026Close54.594May 22, 2026Close54.188Jun 2, 2026Close55.188Jun 10, 2026Close54.594Jun 18, 2026Close55.844Jun 29, 2026Close56.313Jul 8, 2026Close54.344Jul 16, 2026Close54.125Jul 24, 2026Close53.469Aug 3, 2026Close52.875Aug 11, 2026Close52.750Aug 19, 2026Close53.281Aug 27, 2026Close53.406Sep 4, 2026Close52.906Sep 9, 2026Close52.656
The most recent 20 trading days of prices for 912810SU3.
DateBidOfferClose
Sep 9, 202652.50052.46952.656
Sep 8, 202652.96952.93852.875
Sep 4, 202653.00052.96952.906
Sep 3, 202653.06353.03152.906
Sep 2, 202652.68852.65652.688
Sep 1, 202652.93852.90652.688
Aug 31, 202652.78152.75052.875
Aug 28, 202653.50053.46953.188
Aug 27, 202653.56353.53153.406
Aug 26, 202653.54753.53153.500
Aug 25, 202653.56353.53153.594
Aug 24, 202653.21953.18853.063
Aug 21, 202652.75052.71952.625
Aug 20, 202652.84452.81352.969
Aug 19, 202653.18853.15653.281
Aug 18, 202652.28152.25052.375
Aug 17, 202652.40652.37552.156
Aug 14, 202652.59452.56352.625
Aug 13, 202653.06353.03153.063
Aug 12, 202652.89152.87552.750

Prices are per 100 of face, from Treasury's own end-of-day file. A dash in the bid or offer column means none was posted that day.

3 auctions

A CUSIP can be auctioned more than once: Treasury reopens an existing security rather than issuing a new one, so the same bond is sold again at whatever yield the market then wants.

Auction history for 912810SU3.
Auction dateIssuedTypeOfferedAcceptedBid to coverHigh yield
Feb 11, 2021Feb 16, 2021New issue$27.0bn$36.8bn2.18x1.933%
Mar 11, 2021Mar 15, 2021Reopening$24.0bn$25.5bn2.28x2.295%
Apr 13, 2021Apr 15, 2021Reopening$24.0bn$27.7bn2.47x2.320%

The curve this was priced against →

Index levels before September 30, 2026 are back-tested. They were computed after the fact by applying the rules to historical data, which benefits from hindsight in the choice of rules, and an index cannot be invested in directly. Methodology v1.0 takes effect at that rebalance, when levels begin to be struck on the day; the rulebook is identical either way, and the version is published on every row.

A fitted curve is a fit, not a quote. Daily error averages 3.8 basis points across the history and reaches about 20 on the worst days, in December 2008, when the market was genuinely hard to fit one smooth curve to. Every curve page publishes its own fit error rather than burying it.

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Safe Rate™, Safe Rate Indices™ and the Safe Rate US Treasury Index™ are trademarks of Safe Rate, claimed through use in commerce and not registered. Third-party marks are the property of their owners, which are not affiliated with and do not endorse this data.

Curves are fitted from public Treasury data and carry fit error; figures are not a record of trading, and an index cannot be invested in directly. No claim of compliance with the IOSCO Principles for Financial Benchmarks is made or implied. Not investment advice, not an offer, and not a recommendation to buy or sell any security.