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
2.871%
Index ratio
1.0399
Real duration
7.961 yr
DV01
0.0738
Convexity
0.709
Real clean price
92.313
Accrued (real)
0.397
Real dirty price
92.710
Indexed principal
103.993
Money clean price
95.998
The index ratio is a multiplier, not a percentage: 1.0399 means the principal is worth that many times its original face today. So the real clean price of 92.313 is not what a buyer pays , multiply by the ratio to get 95.998 per 100 of original face.
Against the fitted real curve
Priced 2.2 bp rich to the real curve on that day, 16.06 cents per 100 of face.
That is -0.92 standard deviations from its own typical residual.
Real yield, 293 observations
Price history
293 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CNS6.
Date
Bid
Offer
Close
Sep 30, 2026
92.438
92.406
92.313
Sep 29, 2026
92.250
92.219
92.469
Sep 28, 2026
92.500
92.469
92.531
Sep 25, 2026
92.828
92.813
93.063
Sep 24, 2026
93.109
93.094
92.875
Sep 23, 2026
93.719
93.688
93.469
Sep 22, 2026
94.469
94.438
94.500
Sep 21, 2026
94.406
94.375
94.563
Sep 18, 2026
94.188
94.156
94.063
Sep 17, 2026
94.500
94.469
94.594
Sep 16, 2026
94.797
94.781
94.156
Sep 15, 2026
94.703
94.688
94.625
Sep 14, 2026
94.938
94.906
94.781
Sep 11, 2026
95.063
95.031
94.813
Sep 10, 2026
95.500
95.469
95.219
Sep 9, 2026
95.891
95.844
95.969
Sep 8, 2026
96.219
96.188
96.188
Sep 4, 2026
96.188
96.156
96.188
Sep 3, 2026
96.531
96.500
96.281
Sep 2, 2026
96.063
96.031
96.031
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.
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.