Treasury bond

912810QK7 · 3.875% due August 15, 2040

Original term
30-Year
Maturity
Aug 15, 2040
Coupon
3.875%
Pays
Semi-Annual
Dated
Aug 15, 2010
First coupon
Feb 15, 2011
Priced through
Sep 9, 2026
Analyzed through
Sep 9, 2026

Statement of August 31, 2026

Amount outstanding
$43.21bn
Held stripped
$527.4m
Share stripped
1.22%

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
5.054%
Modified duration
10.367 yr
DV01
0.0918
Convexity
132.508
Dirty price
88.586

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 9 of twelve buckets, summing to 10.570 years against a modified duration of 10.367.

Against the fitted curve

Priced 2.9 bp rich to the curve on that day, 26.26 cents per 100 of face.

That is -2.56 standard deviations from its own typical residual.

Yield to maturity, 4,018 observations

0%1%2%3%4%5%6%Aug 16, 2010Sep 9, 2026Aug 16, 2010Yield to maturity3.722%Sep 9, 2010Yield to maturity3.841%Oct 4, 2010Yield to maturity3.713%Oct 28, 2010Yield to maturity4.053%Nov 23, 2010Yield to maturity4.181%Dec 17, 2010Yield to maturity4.416%Jan 12, 2011Yield to maturity4.524%Feb 7, 2011Yield to maturity4.713%Mar 3, 2011Yield to maturity4.653%Mar 28, 2011Yield to maturity4.524%Apr 20, 2011Yield to maturity4.483%May 16, 2011Yield to maturity4.287%Jun 9, 2011Yield to maturity4.233%Jul 5, 2011Yield to maturity4.395%Jul 28, 2011Yield to maturity4.265%Aug 22, 2011Yield to maturity3.414%Sep 15, 2011Yield to maturity3.354%Oct 11, 2011Yield to maturity3.107%Nov 3, 2011Yield to maturity3.097%Nov 30, 2011Yield to maturity3.037%Dec 23, 2011Yield to maturity3.017%Jan 20, 2012Yield to maturity3.065%Feb 14, 2012Yield to maturity3.004%Mar 9, 2012Yield to maturity3.132%Apr 3, 2012Yield to maturity3.361%Apr 26, 2012Yield to maturity3.076%May 21, 2012Yield to maturity2.738%Jun 14, 2012Yield to maturity2.663%Jul 10, 2012Yield to maturity2.532%Aug 2, 2012Yield to maturity2.476%Aug 27, 2012Yield to maturity2.663%Sep 20, 2012Yield to maturity2.859%Oct 16, 2012Yield to maturity2.811%Nov 9, 2012Yield to maturity2.648%Dec 6, 2012Yield to maturity2.654%Jan 2, 2013Yield to maturity2.927%Jan 28, 2013Yield to maturity3.036%Feb 21, 2013Yield to maturity3.074%Mar 18, 2013Yield to maturity3.086%Apr 11, 2013Yield to maturity2.918%May 6, 2013Yield to maturity2.893%May 30, 2013Yield to maturity3.186%Jun 24, 2013Yield to maturity3.488%Jul 18, 2013Yield to maturity3.550%Aug 12, 2013Yield to maturity3.609%Sep 5, 2013Yield to maturity3.828%Sep 30, 2013Yield to maturity3.635%Oct 24, 2013Yield to maturity3.536%Nov 19, 2013Yield to maturity3.724%Dec 13, 2013Yield to maturity3.803%Jan 9, 2014Yield to maturity3.802%Feb 4, 2014Yield to maturity3.518%Feb 28, 2014Yield to maturity3.517%Mar 25, 2014Yield to maturity3.511%Apr 17, 2014Yield to maturity3.439%May 13, 2014Yield to maturity3.351%Jun 6, 2014Yield to maturity3.347%Jul 1, 2014Yield to maturity3.312%Jul 25, 2014Yield to maturity3.155%Aug 19, 2014Yield to maturity3.125%Sep 15, 2014Yield to maturity3.259%Oct 8, 2014Yield to maturity2.983%Nov 3, 2014Yield to maturity2.984%Dec 1, 2014Yield to maturity2.863%Dec 24, 2014Yield to maturity2.752%Jan 21, 2015Yield to maturity2.375%Feb 13, 2015Yield to maturity2.578%Mar 11, 2015Yield to maturity2.635%Apr 3, 2015Yield to maturity2.434%Apr 28, 2015Yield to maturity2.628%May 21, 2015Yield to maturity2.941%Jun 16, 2015Yield to maturity3.013%Jul 10, 2015Yield to maturity3.155%Aug 4, 2015Yield to maturity2.827%Aug 27, 2015Yield to maturity2.860%Sep 22, 2015Yield to maturity2.869%Oct 16, 2015Yield to maturity2.769%Nov 10, 2015Yield to maturity3.016%Dec 7, 2015Yield to maturity2.851%Dec 31, 2015Yield to maturity2.908%Jan 27, 2016Yield to maturity2.678%Feb 22, 2016Yield to maturity2.458%Mar 16, 2016Yield to maturity2.588%Apr 11, 2016Yield to maturity2.421%May 4, 2016Yield to maturity2.485%May 27, 2016Yield to maturity2.504%Jun 22, 2016Yield to maturity2.329%Jul 18, 2016Yield to maturity2.150%Aug 10, 2016Yield to maturity2.076%Sep 2, 2016Yield to maturity2.159%Sep 28, 2016Yield to maturity2.176%Oct 24, 2016Yield to maturity2.405%Nov 17, 2016Yield to maturity2.914%Dec 13, 2016Yield to maturity3.063%Jan 9, 2017Yield to maturity2.894%Feb 2, 2017Yield to maturity3.007%Feb 28, 2017Yield to maturity2.899%Mar 23, 2017Yield to maturity2.949%Apr 18, 2017Yield to maturity2.753%May 11, 2017Yield to maturity2.949%Jun 6, 2017Yield to maturity2.705%Jun 29, 2017Yield to maturity2.735%Jul 25, 2017Yield to maturity2.816%Aug 17, 2017Yield to maturity2.671%Sep 12, 2017Yield to maturity2.653%Oct 5, 2017Yield to maturity2.780%Oct 31, 2017Yield to maturity2.771%Nov 24, 2017Yield to maturity2.679%Dec 19, 2017Yield to maturity2.742%Jan 16, 2018Yield to maturity2.759%Feb 8, 2018Yield to maturity3.078%Mar 6, 2018Yield to maturity3.080%Mar 29, 2018Yield to maturity2.905%Apr 24, 2018Yield to maturity3.122%May 17, 2018Yield to maturity3.214%Jun 12, 2018Yield to maturity3.054%Jul 6, 2018Yield to maturity2.903%Jul 31, 2018Yield to maturity3.054%Aug 23, 2018Yield to maturity2.931%Sep 18, 2018Yield to maturity3.170%Oct 12, 2018Yield to maturity3.286%Nov 6, 2018Yield to maturity3.393%Dec 3, 2018Yield to maturity3.206%Dec 28, 2018Yield to maturity2.953%Jan 24, 2019Yield to maturity2.955%Feb 19, 2019Yield to maturity2.901%Mar 14, 2019Yield to maturity2.927%Apr 8, 2019Yield to maturity2.802%May 2, 2019Yield to maturity2.821%May 28, 2019Yield to maturity2.569%Jun 20, 2019Yield to maturity2.371%Jul 16, 2019Yield to maturity2.472%Aug 8, 2019Yield to maturity2.069%Sep 3, 2019Yield to maturity1.810%Sep 26, 2019Yield to maturity2.005%Oct 22, 2019Yield to maturity2.126%Nov 15, 2019Yield to maturity2.204%Dec 11, 2019Yield to maturity2.122%Jan 7, 2020Yield to maturity2.197%Jan 31, 2020Yield to maturity1.862%Feb 26, 2020Yield to maturity1.673%Mar 20, 2020Yield to maturity1.393%Apr 15, 2020Yield to maturity1.103%May 8, 2020Yield to maturity1.167%Jun 3, 2020Yield to maturity1.285%Jun 26, 2020Yield to maturity1.112%Jul 22, 2020Yield to maturity1.035%Aug 14, 2020Yield to maturity1.166%Sep 9, 2020Yield to maturity1.179%Oct 2, 2020Yield to maturity1.177%Oct 28, 2020Yield to maturity1.256%Nov 23, 2020Yield to maturity1.266%Dec 17, 2020Yield to maturity1.381%Jan 13, 2021Yield to maturity1.533%Feb 8, 2021Yield to maturity1.684%Mar 4, 2021Yield to maturity2.073%Mar 29, 2021Yield to maturity2.221%Apr 21, 2021Yield to maturity2.046%May 14, 2021Yield to maturity2.157%Jun 9, 2021Yield to maturity2.003%Jul 2, 2021Yield to maturity1.888%Jul 28, 2021Yield to maturity1.722%Aug 20, 2021Yield to maturity1.673%Sep 15, 2021Yield to maturity1.680%Oct 8, 2021Yield to maturity1.998%Nov 3, 2021Yield to maturity1.919%Nov 30, 2021Yield to maturity1.755%Dec 23, 2021Yield to maturity1.839%Jan 19, 2022Yield to maturity2.145%Feb 11, 2022Yield to maturity2.245%Mar 9, 2022Yield to maturity2.283%Apr 1, 2022Yield to maturity2.551%Apr 27, 2022Yield to maturity3.040%May 20, 2022Yield to maturity3.092%Jun 15, 2022Yield to maturity3.573%Jul 12, 2022Yield to maturity3.234%Aug 4, 2022Yield to maturity3.001%Aug 29, 2022Yield to maturity3.400%Sep 22, 2022Yield to maturity3.867%Oct 18, 2022Yield to maturity4.201%Nov 10, 2022Yield to maturity4.173%Dec 7, 2022Yield to maturity3.610%Jan 3, 2023Yield to maturity3.967%Jan 27, 2023Yield to maturity3.661%Feb 22, 2023Yield to maturity4.025%Mar 17, 2023Yield to maturity3.612%Apr 11, 2023Yield to maturity3.609%May 4, 2023Yield to maturity3.644%May 30, 2023Yield to maturity3.935%Jun 23, 2023Yield to maturity3.895%Jul 19, 2023Yield to maturity3.903%Aug 11, 2023Yield to maturity4.357%Sep 6, 2023Yield to maturity4.480%Sep 29, 2023Yield to maturity4.886%Oct 25, 2023Yield to maturity5.264%Nov 17, 2023Yield to maturity4.741%Dec 13, 2023Yield to maturity4.306%Jan 9, 2024Yield to maturity4.226%Feb 2, 2024Yield to maturity4.257%Feb 28, 2024Yield to maturity4.481%Mar 22, 2024Yield to maturity4.395%Apr 16, 2024Yield to maturity4.828%May 9, 2024Yield to maturity4.609%Jun 4, 2024Yield to maturity4.470%Jun 28, 2024Yield to maturity4.495%Jul 24, 2024Yield to maturity4.488%Aug 16, 2024Yield to maturity4.079%Sep 11, 2024Yield to maturity3.840%Oct 4, 2024Yield to maturity4.173%Oct 30, 2024Yield to maturity4.472%Nov 25, 2024Yield to maturity4.439%Dec 19, 2024Yield to maturity4.774%Jan 15, 2025Yield to maturity4.895%Feb 10, 2025Yield to maturity4.668%Mar 6, 2025Yield to maturity4.521%Mar 31, 2025Yield to maturity4.475%Apr 23, 2025Yield to maturity4.743%May 16, 2025Yield to maturity4.804%Jun 11, 2025Yield to maturity4.779%Jul 8, 2025Yield to maturity4.805%Jul 31, 2025Yield to maturity4.714%Aug 25, 2025Yield to maturity4.677%Sep 18, 2025Yield to maturity4.486%Oct 14, 2025Yield to maturity4.389%Nov 6, 2025Yield to maturity4.466%Dec 3, 2025Yield to maturity4.480%Dec 29, 2025Yield to maturity4.525%Jan 23, 2026Yield to maturity4.571%Feb 18, 2026Yield to maturity4.432%Mar 13, 2026Yield to maturity4.667%Apr 7, 2026Yield to maturity4.682%Apr 30, 2026Yield to maturity4.749%May 26, 2026Yield to maturity4.824%Jun 18, 2026Yield to maturity4.727%Jul 15, 2026Yield to maturity4.857%Aug 7, 2026Yield to maturity4.958%Sep 1, 2026Yield to maturity5.039%Sep 9, 2026Yield to maturity5.054%

Price history

4,018 trading days to Sep 9, 2026

80100120140160Aug 16, 2010Sep 9, 2026Aug 16, 2010Close102.750Sep 9, 2010Close100.594Oct 4, 2010Close102.906Oct 28, 2010Close96.938Nov 23, 2010Close94.813Dec 17, 2010Close91.094Jan 12, 2011Close89.469Feb 7, 2011Close86.719Mar 3, 2011Close87.594Mar 28, 2011Close89.500Apr 20, 2011Close90.125May 16, 2011Close93.156Jun 9, 2011Close94.031Jul 5, 2011Close91.500Jul 28, 2011Close93.531Aug 22, 2011Close108.438Sep 15, 2011Close109.594Oct 11, 2011Close114.563Nov 3, 2011Close114.750Nov 30, 2011Close115.969Dec 23, 2011Close116.375Jan 20, 2012Close115.344Feb 14, 2012Close116.594Mar 9, 2012Close113.906Apr 3, 2012Close109.344Apr 26, 2012Close115.031May 21, 2012Close122.250Jun 14, 2012Close123.906Jul 10, 2012Close126.875Aug 2, 2012Close128.156Aug 27, 2012Close123.781Sep 20, 2012Close119.438Oct 16, 2012Close120.438Nov 9, 2012Close124.000Dec 6, 2012Close123.844Jan 2, 2013Close117.875Jan 28, 2013Close115.594Feb 21, 2013Close114.781Mar 18, 2013Close114.531Apr 11, 2013Close117.938May 6, 2013Close118.438May 30, 2013Close112.469Jun 24, 2013Close106.750Jul 18, 2013Close105.625Aug 12, 2013Close104.563Sep 5, 2013Close100.781Sep 30, 2013Close104.094Oct 24, 2013Close105.844Nov 19, 2013Close102.531Dec 13, 2013Close101.188Jan 9, 2014Close101.219Feb 4, 2014Close106.125Feb 28, 2014Close106.125Mar 25, 2014Close106.219Apr 17, 2014Close107.500May 13, 2014Close109.094Jun 6, 2014Close109.156Jul 1, 2014Close109.781Jul 25, 2014Close112.719Aug 19, 2014Close113.281Sep 15, 2014Close110.719Oct 8, 2014Close116.000Nov 3, 2014Close115.938Dec 1, 2014Close118.313Dec 24, 2014Close120.563Jan 21, 2015Close128.625Feb 13, 2015Close124.125Mar 11, 2015Close122.875Apr 3, 2015Close127.156Apr 28, 2015Close122.938May 21, 2015Close116.563Jun 16, 2015Close115.125Jul 10, 2015Close112.406Aug 4, 2015Close118.719Aug 27, 2015Close118.031Sep 22, 2015Close117.813Oct 16, 2015Close119.750Nov 10, 2015Close114.906Dec 7, 2015Close118.063Dec 31, 2015Close116.906Jan 27, 2016Close121.438Feb 22, 2016Close125.938Mar 16, 2016Close123.188Apr 11, 2016Close126.625May 4, 2016Close125.219May 27, 2016Close124.781Jun 22, 2016Close128.438Jul 18, 2016Close132.281Aug 10, 2016Close133.875Sep 2, 2016Close131.938Sep 28, 2016Close131.500Oct 24, 2016Close126.531Nov 17, 2016Close116.375Dec 13, 2016Close113.594Jan 9, 2017Close116.688Feb 2, 2017Close114.563Feb 28, 2017Close116.531Mar 23, 2017Close115.563Apr 18, 2017Close119.219May 11, 2017Close115.500Jun 6, 2017Close120.063Jun 29, 2017Close119.438Jul 25, 2017Close117.875Aug 17, 2017Close120.594Sep 12, 2017Close120.875Oct 5, 2017Close118.438Oct 31, 2017Close118.563Nov 24, 2017Close120.250Dec 19, 2017Close119.031Jan 16, 2018Close118.656Feb 8, 2018Close112.875Mar 6, 2018Close112.813Mar 29, 2018Close115.875Apr 24, 2018Close112.031May 17, 2018Close110.438Jun 12, 2018Close113.156Jul 6, 2018Close115.781Jul 31, 2018Close113.094Aug 23, 2018Close115.219Sep 18, 2018Close111.063Oct 12, 2018Close109.125Nov 6, 2018Close107.375Dec 3, 2018Close110.406Dec 28, 2018Close114.656Jan 24, 2019Close114.594Feb 19, 2019Close115.500Mar 14, 2019Close115.000Apr 8, 2019Close117.156May 2, 2019Close116.781May 28, 2019Close121.250Jun 20, 2019Close124.906Jul 16, 2019Close122.938Aug 8, 2019Close130.656Sep 3, 2019Close135.875Sep 26, 2019Close131.781Oct 22, 2019Close129.281Nov 15, 2019Close127.688Dec 11, 2019Close129.219Jan 7, 2020Close127.688Jan 31, 2020Close134.219Feb 26, 2020Close138.031Mar 20, 2020Close143.938Apr 15, 2020Close150.375May 8, 2020Close148.750Jun 3, 2020Close145.938Jun 26, 2020Close149.719Jul 22, 2020Close151.344Aug 14, 2020Close148.188Sep 9, 2020Close147.750Oct 2, 2020Close147.656Oct 28, 2020Close145.781Nov 23, 2020Close145.406Dec 17, 2020Close142.813Jan 13, 2021Close139.500Feb 8, 2021Close136.313Mar 4, 2021Close128.719Mar 29, 2021Close125.938Apr 21, 2021Close129.063May 14, 2021Close126.938Jun 9, 2021Close129.688Jul 2, 2021Close131.750Jul 28, 2021Close134.844Aug 20, 2021Close135.688Sep 15, 2021Close135.438Oct 8, 2021Close129.344Nov 3, 2021Close130.719Nov 30, 2021Close133.688Dec 23, 2021Close132.000Jan 19, 2022Close126.375Feb 11, 2022Close124.563Mar 9, 2022Close123.844Apr 1, 2022Close119.313Apr 27, 2022Close111.656May 20, 2022Close110.844Jun 15, 2022Close104.000Jul 12, 2022Close108.719Aug 4, 2022Close112.094Aug 29, 2022Close106.344Sep 22, 2022Close100.094Oct 18, 2022Close95.938Nov 10, 2022Close96.281Dec 7, 2022Close103.438Jan 3, 2023Close98.844Jan 27, 2023Close102.750Feb 22, 2023Close98.125Mar 17, 2023Close103.375Apr 11, 2023Close103.406May 4, 2023Close102.938May 30, 2023Close99.250Jun 23, 2023Close99.750Jul 19, 2023Close99.656Aug 11, 2023Close94.250Sep 6, 2023Close92.875Sep 29, 2023Close88.469Oct 25, 2023Close84.625Nov 17, 2023Close90.063Dec 13, 2023Close94.906Jan 9, 2024Close95.844Feb 2, 2024Close95.500Feb 28, 2024Close93.000Mar 22, 2024Close93.969Apr 16, 2024Close89.313May 9, 2024Close91.656Jun 4, 2024Close93.188Jun 28, 2024Close92.938Jul 24, 2024Close93.031Aug 16, 2024Close97.625Sep 11, 2024Close100.406Oct 4, 2024Close96.563Oct 30, 2024Close93.281Nov 25, 2024Close93.656Dec 19, 2024Close90.156Jan 15, 2025Close88.969Feb 10, 2025Close91.313Mar 6, 2025Close92.875Mar 31, 2025Close93.375Apr 23, 2025Close90.625May 16, 2025Close90.031Jun 11, 2025Close90.313Jul 8, 2025Close90.094Jul 31, 2025Close91.031Aug 25, 2025Close91.438Sep 18, 2025Close93.406Oct 14, 2025Close94.438Nov 6, 2025Close93.656Dec 3, 2025Close93.531Dec 29, 2025Close93.094Jan 23, 2026Close92.656Feb 18, 2026Close94.094Mar 13, 2026Close91.750Apr 7, 2026Close91.625Apr 30, 2026Close91.000May 26, 2026Close90.313Jun 18, 2026Close91.281Jul 15, 2026Close90.063Aug 7, 2026Close89.156Sep 1, 2026Close88.438Sep 9, 2026Close88.313
The most recent 20 trading days of prices for 912810QK7.
DateBidOfferClose
Sep 9, 202688.17288.09488.313
Sep 8, 202688.70388.65688.531
Sep 4, 202688.78188.71988.656
Sep 3, 202688.92288.87588.688
Sep 2, 202688.46988.40688.438
Sep 1, 202688.75088.68888.438
Aug 31, 202688.71988.65688.750
Aug 28, 202689.32889.25089.000
Aug 27, 202689.54789.50089.375
Aug 26, 202689.51689.46989.406
Aug 25, 202689.59489.53189.594
Aug 24, 202689.18889.12589.000
Aug 21, 202688.73488.68888.625
Aug 20, 202688.95388.90689.031
Aug 19, 202689.31389.25089.406
Aug 18, 202688.51688.46988.563
Aug 17, 202688.62588.56388.375
Aug 14, 202688.82888.78188.781
Aug 13, 202689.26689.21989.250
Aug 12, 202688.98488.93888.781

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 912810QK7.
Auction dateIssuedTypeOfferedAcceptedBid to coverHigh yield
Aug 12, 2010Aug 16, 2010New issue$16.0bn$17.0bn2.77x3.954%
Sep 9, 2010Sep 15, 2010Reopening$13.0bn$13.1bn2.73x3.820%
Oct 14, 2010Oct 15, 2010Reopening$13.0bn$13.1bn2.49x3.852%

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.