Treasury bond

912810UG1 · 4.625% due February 15, 2055

Original term
30-Year
Maturity
Feb 15, 2055
Coupon
4.625%
Pays
Semi-Annual
Dated
Feb 15, 2025
First coupon
Aug 15, 2025
Priced through
Sep 10, 2026
Analyzed through
Sep 10, 2026

Statement of August 31, 2026

Amount outstanding
$79.90bn
Held stripped
$19.16bn
Share stripped
23.98%

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
5.392%
Modified duration
14.870 yr
DV01
0.1327
Convexity
325.393
Dirty price
89.246

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 12 of twelve buckets, summing to 15.012 years against a modified duration of 14.870.

Against the fitted curve

Priced 0.3 bp rich to the curve on that day, 4.64 cents per 100 of face.

That is 0.76 standard deviations from its own typical residual.

Yield to maturity, 393 observations

4.4%4.6%4.8%5.0%5.2%5.4%Feb 18, 2025Sep 10, 2026Feb 18, 2025Yield to maturity4.775%Mar 3, 2025Yield to maturity4.452%Mar 14, 2025Yield to maturity4.619%Mar 27, 2025Yield to maturity4.729%Apr 9, 2025Yield to maturity4.719%Apr 22, 2025Yield to maturity4.885%May 5, 2025Yield to maturity4.829%May 16, 2025Yield to maturity4.902%May 30, 2025Yield to maturity4.933%Jun 12, 2025Yield to maturity4.848%Jun 26, 2025Yield to maturity4.822%Jul 10, 2025Yield to maturity4.871%Jul 23, 2025Yield to maturity4.953%Aug 5, 2025Yield to maturity4.782%Aug 18, 2025Yield to maturity4.947%Aug 29, 2025Yield to maturity4.924%Sep 12, 2025Yield to maturity4.682%Sep 25, 2025Yield to maturity4.754%Oct 8, 2025Yield to maturity4.730%Oct 22, 2025Yield to maturity4.545%Nov 4, 2025Yield to maturity4.674%Nov 18, 2025Yield to maturity4.750%Dec 2, 2025Yield to maturity4.746%Dec 15, 2025Yield to maturity4.856%Dec 29, 2025Yield to maturity4.807%Jan 12, 2026Yield to maturity4.844%Jan 26, 2026Yield to maturity4.807%Feb 6, 2026Yield to maturity4.861%Feb 20, 2026Yield to maturity4.733%Mar 5, 2026Yield to maturity4.753%Mar 18, 2026Yield to maturity4.895%Mar 31, 2026Yield to maturity4.899%Apr 13, 2026Yield to maturity4.914%Apr 24, 2026Yield to maturity4.923%May 7, 2026Yield to maturity4.991%May 20, 2026Yield to maturity5.133%Jun 3, 2026Yield to maturity5.011%Jun 16, 2026Yield to maturity4.942%Jun 30, 2026Yield to maturity4.934%Jul 14, 2026Yield to maturity5.103%Jul 27, 2026Yield to maturity5.146%Aug 7, 2026Yield to maturity5.216%Aug 20, 2026Yield to maturity5.252%Sep 2, 2026Yield to maturity5.289%Sep 10, 2026Yield to maturity5.392%

Price history

393 trading days to Sep 10, 2026

87.590.092.595.097.5100.0102.5105.0Feb 18, 2025Sep 10, 2026Feb 18, 2025Close97.625Mar 3, 2025Close102.844Mar 14, 2025Close100.094Mar 27, 2025Close98.344Apr 9, 2025Close98.500Apr 22, 2025Close95.938May 5, 2025Close96.781May 16, 2025Close95.688May 30, 2025Close95.219Jun 12, 2025Close96.500Jun 26, 2025Close96.906Jul 10, 2025Close96.156Jul 23, 2025Close94.938Aug 5, 2025Close97.531Aug 18, 2025Close95.031Aug 29, 2025Close95.375Sep 12, 2025Close99.094Sep 25, 2025Close97.969Oct 8, 2025Close98.344Oct 22, 2025Close101.281Nov 4, 2025Close99.219Nov 18, 2025Close98.031Dec 2, 2025Close98.094Dec 15, 2025Close96.406Dec 29, 2025Close97.156Jan 12, 2026Close96.594Jan 26, 2026Close97.156Feb 6, 2026Close96.344Feb 20, 2026Close98.313Mar 5, 2026Close98.000Mar 18, 2026Close95.844Mar 31, 2026Close95.781Apr 13, 2026Close95.563Apr 24, 2026Close95.438May 7, 2026Close94.438May 20, 2026Close92.406Jun 3, 2026Close94.156Jun 16, 2026Close95.156Jun 30, 2026Close95.281Jul 14, 2026Close92.844Jul 27, 2026Close92.250Aug 7, 2026Close91.281Aug 20, 2026Close90.781Sep 2, 2026Close90.281Sep 10, 2026Close88.906
The most recent 20 trading days of prices for 912810UG1.
DateBidOfferClose
Sep 10, 202689.26689.25088.906
Sep 9, 202689.90689.87590.125
Sep 8, 202690.60990.59490.469
Sep 4, 202690.65690.62590.625
Sep 3, 202690.79790.78190.563
Sep 2, 202690.28190.25090.281
Sep 1, 202690.60990.59490.281
Aug 31, 202690.39190.37590.563
Aug 28, 202691.45391.43891.000
Aug 27, 202691.53191.50091.344
Aug 26, 202691.48491.46991.469
Aug 25, 202691.51691.50091.625
Aug 24, 202690.98490.96990.781
Aug 21, 202690.31390.28190.156
Aug 20, 202690.54790.53190.781
Aug 19, 202691.12591.09491.281
Aug 18, 202689.82889.81389.969
Aug 17, 202690.01690.00089.656
Aug 14, 202690.31390.28190.406
Aug 13, 202691.01691.00091.031

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 912810UG1.
Auction dateIssuedTypeOfferedAcceptedBid to coverHigh yield
Feb 13, 2025Feb 18, 2025New issue$25.0bn$31.9bn2.33x4.748%
Mar 13, 2025Mar 17, 2025Reopening$22.0bn$22.4bn2.37x4.623%
Apr 10, 2025Apr 15, 2025Reopening$22.0bn$25.7bn2.43x4.813%

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.