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, November 9, 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
3.121%
Index ratio
1.3608
Real duration
18.261 yr
DV01
0.1232
Convexity
3.75
Real clean price
67.219
Accrued (real)
0.236
Real dirty price
67.455
Indexed principal
136.080
Money clean price
91.471
The index ratio is a multiplier, not a percentage: 1.3608 means the principal is worth that many times its original face today. So the real clean price of 67.219 is not what a buyer pays , multiply by the ratio to get 91.471 per 100 of original face.
Against the fitted real curve
Priced 0.8 bp rich to the real curve on that day, 9.69 cents per 100 of face.
That is -2.24 standard deviations from its own typical residual.
Real yield, 2,175 observations
Price history
2,175 trading days to Nov 9, 2026
The most recent 20 trading days of prices for 912810SB5.
Date
Bid
Offer
Close
Nov 9, 2026
67.313
67.359
67.219
Nov 6, 2026
67.625
67.703
67.469
Nov 5, 2026
67.531
67.625
67.594
Nov 4, 2026
66.969
67.031
67.313
Nov 3, 2026
67.313
67.391
67.156
Nov 2, 2026
67.938
68.000
67.469
Oct 30, 2026
67.406
67.469
67.281
Oct 29, 2026
67.531
67.594
67.406
Oct 28, 2026
67.375
67.438
66.969
Oct 27, 2026
67.563
67.625
67.625
Oct 26, 2026
67.406
67.469
67.406
Oct 23, 2026
67.500
67.563
67.281
Oct 22, 2026
67.156
67.234
67.688
Oct 21, 2026
66.500
66.563
66.406
Oct 20, 2026
66.156
66.234
66.281
Oct 19, 2026
65.906
65.969
65.594
Oct 16, 2026
66.406
66.484
66.313
Oct 15, 2026
66.094
66.188
66.000
Oct 14, 2026
64.813
64.891
65.250
Oct 13, 2026
64.781
64.859
64.750
Prices are per 100 of face, from Treasury's own end-of-day file. A dash means that side was not quoted that day, which is almost always the offer and almost always near maturity: a holder of a bill days from paying par has little reason to sell it.
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.
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.