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
2.860%
Index ratio
1.5526
Real duration
11.316 yr
DV01
0.1046
Convexity
1.46
Real clean price
91.938
Accrued (real)
0.502
Real dirty price
92.440
Indexed principal
155.255
Money clean price
142.738
The index ratio is a multiplier, not a percentage: 1.5526 means the principal is worth that many times its original face today. So the real clean price of 91.938 is not what a buyer pays , multiply by the ratio to get 142.738 per 100 of original face.
Against the fitted real curve
Priced 0.6 bp rich to the real curve on that day, 6.18 cents per 100 of face.
That is 1.49 standard deviations from its own typical residual.
Real yield, 4,177 observations
Price history
4,177 trading days to Nov 9, 2026
The most recent 20 trading days of prices for 912810QF8.
Date
Bid
Offer
Close
Nov 9, 2026
92.031
92.094
91.938
Nov 6, 2026
92.313
92.391
92.250
Nov 5, 2026
92.250
92.344
92.406
Nov 4, 2026
91.813
91.891
92.031
Nov 3, 2026
92.094
92.188
91.969
Nov 2, 2026
92.656
92.719
92.250
Oct 30, 2026
92.250
92.313
92.250
Oct 29, 2026
92.125
92.219
92.094
Oct 28, 2026
91.813
91.891
91.625
Oct 27, 2026
92.031
92.109
92.094
Oct 26, 2026
91.906
91.984
91.875
Oct 23, 2026
91.969
92.031
91.875
Oct 22, 2026
91.625
91.703
92.156
Oct 21, 2026
91.000
91.078
90.875
Oct 20, 2026
90.781
90.875
90.844
Oct 19, 2026
90.594
90.672
90.344
Oct 16, 2026
90.969
91.047
90.969
Oct 15, 2026
90.656
90.750
90.625
Oct 14, 2026
89.531
89.625
89.969
Oct 13, 2026
89.594
89.688
89.594
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.
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.