Treasury bond

912810SS8 · 1.625% due November 15, 2050

Original term
30-Year
Maturity
Nov 15, 2050
Coupon
1.625%
Pays
Semi-Annual
Dated
Nov 15, 2020
First coupon
May 15, 2021
Priced through
Sep 10, 2026
Analyzed through
Sep 10, 2026

Statement of August 31, 2026

Amount outstanding
$85.46bn
Held stripped
$15.96bn
Share stripped
18.68%

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 10, 2026

Yield to maturity
5.476%
Modified duration
17.126 yr
DV01
0.0843
Convexity
371.376
Dirty price
49.244

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 17.388 years against a modified duration of 17.126.

Against the fitted curve

Priced 2.9 bp rich to the curve on that day, 24.08 cents per 100 of face.

That is -0.70 standard deviations from its own typical residual.

Yield to maturity, 1,457 observations

1%2%3%4%5%6%Nov 16, 2020Sep 10, 2026Nov 16, 2020Yield to maturity1.662%Jan 6, 2021Yield to maturity1.806%Feb 25, 2021Yield to maturity2.337%Apr 14, 2021Yield to maturity2.329%Jun 2, 2021Yield to maturity2.303%Jul 21, 2021Yield to maturity1.961%Sep 8, 2021Yield to maturity1.967%Oct 27, 2021Yield to maturity1.958%Dec 16, 2021Yield to maturity1.898%Feb 4, 2022Yield to maturity2.250%Mar 25, 2022Yield to maturity2.649%May 13, 2022Yield to maturity3.178%Jul 5, 2022Yield to maturity3.116%Aug 22, 2022Yield to maturity3.338%Oct 11, 2022Yield to maturity3.983%Nov 30, 2022Yield to maturity3.901%Jan 20, 2023Yield to maturity3.704%Mar 10, 2023Yield to maturity3.729%Apr 27, 2023Yield to maturity3.797%Jun 15, 2023Yield to maturity3.889%Aug 4, 2023Yield to maturity4.248%Sep 22, 2023Yield to maturity4.590%Nov 10, 2023Yield to maturity4.810%Jan 2, 2024Yield to maturity4.171%Feb 21, 2024Yield to maturity4.582%Apr 9, 2024Yield to maturity4.564%May 28, 2024Yield to maturity4.724%Jul 17, 2024Yield to maturity4.456%Sep 4, 2024Yield to maturity4.177%Oct 23, 2024Yield to maturity4.618%Dec 12, 2024Yield to maturity4.676%Feb 3, 2025Yield to maturity4.878%Mar 24, 2025Yield to maturity4.783%May 9, 2025Yield to maturity4.976%Jun 30, 2025Yield to maturity4.898%Aug 18, 2025Yield to maturity5.047%Oct 6, 2025Yield to maturity4.866%Nov 25, 2025Yield to maturity4.784%Jan 15, 2026Yield to maturity4.900%Mar 6, 2026Yield to maturity4.889%Apr 23, 2026Yield to maturity5.041%Jun 11, 2026Yield to maturity5.069%Jul 31, 2026Yield to maturity5.390%Sep 10, 2026Yield to maturity5.476%

Price history

1,457 trading days to Sep 10, 2026

405060708090100110Nov 16, 2020Sep 10, 2026Nov 16, 2020Close99.125Jan 6, 2021Close95.844Feb 25, 2021Close84.813Apr 14, 2021Close85.000Jun 2, 2021Close85.563Jul 21, 2021Close92.531Sep 8, 2021Close92.438Oct 27, 2021Close92.656Dec 16, 2021Close93.938Feb 4, 2022Close86.813Mar 25, 2022Close79.531May 13, 2022Close71.031Jul 5, 2022Close72.063Aug 22, 2022Close68.844Oct 11, 2022Close60.344Nov 30, 2022Close61.469Jan 20, 2023Close64.094Mar 10, 2023Close63.875Apr 27, 2023Close63.094Jun 15, 2023Close62.031Aug 4, 2023Close57.875Sep 22, 2023Close54.250Nov 10, 2023Close52.125Jan 2, 2024Close59.094Feb 21, 2024Close54.688Apr 9, 2024Close55.000May 28, 2024Close53.469Jul 17, 2024Close56.375Sep 4, 2024Close59.594Oct 23, 2024Close54.906Dec 12, 2024Close54.438Feb 3, 2025Close52.563Mar 24, 2025Close53.625May 9, 2025Close51.875Jun 30, 2025Close52.750Aug 18, 2025Close51.469Oct 6, 2025Close53.313Nov 25, 2025Close54.250Jan 15, 2026Close53.250Mar 6, 2026Close53.500Apr 23, 2026Close52.188Jun 11, 2026Close52.063Jul 31, 2026Close49.344Sep 10, 2026Close48.719
The most recent 20 trading days of prices for 912810SS8.
DateBidOfferClose
Sep 10, 202648.96948.93848.719
Sep 9, 202649.35949.31349.500
Sep 8, 202649.81349.78149.719
Sep 4, 202649.82849.78149.781
Sep 3, 202649.87549.84449.719
Sep 2, 202649.56349.53149.531
Sep 1, 202649.78149.75049.531
Aug 31, 202649.62549.59449.719
Aug 28, 202650.32850.28150.000
Aug 27, 202650.34450.31350.219
Aug 26, 202650.35950.34450.313
Aug 25, 202650.34450.31350.406
Aug 24, 202650.03150.00049.875
Aug 21, 202649.56349.53149.438
Aug 20, 202649.65649.62549.781
Aug 19, 202650.00049.96950.063
Aug 18, 202649.09449.06349.188
Aug 17, 202649.23449.21949.000
Aug 14, 202649.40649.37549.469
Aug 13, 202649.87549.84449.844

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 912810SS8.
Auction dateIssuedTypeOfferedAcceptedBid to coverHigh yield
Nov 12, 2020Nov 16, 2020New issue$27.0bn$34.4bn2.29x1.680%
Dec 10, 2020Dec 15, 2020Reopening$24.0bn$25.0bn2.48x1.665%
Jan 13, 2021Jan 15, 2021Reopening$24.0bn$26.4bn2.47x1.825%

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.