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
2.406%
Index ratio
1.3119
Real duration
2.638 yr
DV01
0.0249
Convexity
0.0828
Real clean price
94.438
Accrued (real)
0.080
Real dirty price
94.518
Indexed principal
131.187
Money clean price
123.890
The index ratio is a multiplier, not a percentage: 1.3119 means the principal is worth that many times its original face today. So the real clean price of 94.438 is not what a buyer pays , multiply by the ratio to get 123.890 per 100 of original face.
Against the fitted real curve
Priced 9.5 bp rich to the real curve on that day, 23.63 cents per 100 of face.
That is -0.02 standard deviations from its own typical residual.
Real yield, 1,820 observations
Price history
1,820 trading days to Nov 9, 2026
The most recent 20 trading days of prices for 9128287D6.
Date
Bid
Offer
Close
Nov 9, 2026
94.500
94.516
94.438
Nov 6, 2026
94.656
94.688
94.688
Nov 5, 2026
94.625
94.656
94.719
Nov 4, 2026
94.656
94.688
94.594
Nov 3, 2026
94.844
94.875
94.813
Nov 2, 2026
95.000
95.031
94.938
Oct 30, 2026
95.156
95.172
95.188
Oct 29, 2026
95.000
95.016
95.031
Oct 28, 2026
94.781
94.797
94.938
Oct 27, 2026
94.906
94.938
94.844
Oct 26, 2026
94.906
94.922
94.875
Oct 23, 2026
94.969
94.984
94.969
Oct 22, 2026
94.813
94.859
94.969
Oct 21, 2026
94.688
94.703
94.625
Oct 20, 2026
94.625
94.672
94.625
Oct 19, 2026
94.656
94.672
94.625
Oct 16, 2026
94.625
94.672
94.719
Oct 15, 2026
94.500
94.531
94.531
Oct 14, 2026
94.250
94.281
94.375
Oct 13, 2026
94.281
94.313
94.281
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.
Free to benchmark against. Paid only to track. Measuring anything against these curves and indices is free. No license, no fee, no registration, and no permission needed to say that you did, including in a prospectus. A fee applies to one thing: launching a product that tracks an index.
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.