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
2.391%
Index ratio
1.3088
Real duration
3.627 yr
DV01
0.0334
Convexity
0.15
Real clean price
92.063
Accrued (real)
0.040
Real dirty price
92.103
Indexed principal
130.881
Money clean price
120.493
The index ratio is a multiplier, not a percentage: 1.3088 means the principal is worth that many times its original face today. So the real clean price of 92.063 is not what a buyer pays , multiply by the ratio to get 120.493 per 100 of original face.
Against the fitted real curve
Priced 7.1 bp rich to the real curve on that day, 23.78 cents per 100 of face.
That is -0.62 standard deviations from its own typical residual.
Real yield, 1,569 observations
Price history
1,569 trading days to Nov 9, 2026
The most recent 20 trading days of prices for 912828ZZ6.
Date
Bid
Offer
Close
Nov 9, 2026
92.094
92.125
92.063
Nov 6, 2026
92.313
92.344
92.344
Nov 5, 2026
92.250
92.281
92.375
Nov 4, 2026
92.250
92.281
92.188
Nov 3, 2026
92.406
92.453
92.375
Nov 2, 2026
92.656
92.688
92.563
Oct 30, 2026
92.750
92.781
92.813
Oct 29, 2026
92.563
92.594
92.594
Oct 28, 2026
92.281
92.297
92.406
Oct 27, 2026
92.375
92.406
92.344
Oct 26, 2026
92.375
92.406
92.375
Oct 23, 2026
92.469
92.484
92.469
Oct 22, 2026
92.281
92.313
92.500
Oct 21, 2026
92.063
92.094
92.031
Oct 20, 2026
92.031
92.063
92.031
Oct 19, 2026
92.000
92.031
92.000
Oct 16, 2026
92.031
92.078
92.094
Oct 15, 2026
91.875
91.906
91.875
Oct 14, 2026
91.500
91.531
91.688
Oct 13, 2026
91.563
91.594
91.563
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.