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. For an inflation-linked security the difference is mostly inflation rather than float: Treasury reports what a holder is owed today, which includes the uplift shown as the index ratio above, while the index keeps original par and carries the uplift in the price. The index figures are published per holding.
Inflation-linked measures, September 30, 2026
An inflation-linked security prices off a real curve, so its yield is a real yield, a return above inflation rather than in cash terms, and its principal is indexed. The figures below are in REAL terms unless labeled otherwise.
Real yield
3.367%
Index ratio
1.1233
Real duration
20.240 yr
DV01
0.1371
Convexity
4.92
Real clean price
67.531
Accrued (real)
0.192
Real dirty price
67.723
Indexed principal
112.334
Money clean price
75.861
The index ratio is a multiplier, not a percentage: 1.1233 means the principal is worth that many times its original face today. So the real clean price of 67.531 is not what a buyer pays , multiply by the ratio to get 75.861 per 100 of original face.
Against the fitted real curve
Priced 0.9 bp rich to the real curve on that day, 12.36 cents per 100 of face.
That is -0.85 standard deviations from its own typical residual.
Real yield, 901 observations
Price history
901 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 912810TP3.
Date
Bid
Offer
Close
Sep 30, 2026
67.719
67.656
67.531
Sep 29, 2026
67.797
67.750
68.031
Sep 28, 2026
68.188
68.125
68.188
Sep 25, 2026
68.781
68.719
69.000
Sep 24, 2026
69.594
69.531
69.188
Sep 23, 2026
70.625
70.563
70.313
Sep 22, 2026
71.719
71.656
71.719
Sep 21, 2026
71.734
71.656
71.969
Sep 18, 2026
71.141
71.063
71.000
Sep 17, 2026
71.438
71.375
71.656
Sep 16, 2026
71.594
71.531
71.031
Sep 15, 2026
71.219
71.156
71.188
Sep 14, 2026
71.656
71.594
71.469
Sep 11, 2026
71.750
71.688
71.313
Sep 10, 2026
71.938
71.875
71.469
Sep 9, 2026
72.391
72.313
72.563
Sep 8, 2026
73.063
73.000
72.906
Sep 4, 2026
72.859
72.781
72.906
Sep 3, 2026
73.219
73.156
72.844
Sep 2, 2026
72.656
72.594
72.594
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.
2 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.
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.