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
2.935%
Index ratio
1.0276
Real duration
8.367 yr
DV01
0.0768
Convexity
0.784
Real clean price
91.438
Accrued (real)
0.397
Real dirty price
91.835
Indexed principal
102.765
Money clean price
93.965
The index ratio is a multiplier, not a percentage: 1.0276 means the principal is worth that many times its original face today. So the real clean price of 91.438 is not what a buyer pays , multiply by the ratio to get 93.965 per 100 of original face.
Against the fitted real curve
Priced 1.0 bp cheap to the real curve on that day, 7.83 cents per 100 of face.
That is -0.23 standard deviations from its own typical residual.
Real yield, 169 observations
Price history
169 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CPU9.
Date
Bid
Offer
Close
Sep 30, 2026
91.578
91.563
91.438
Sep 29, 2026
91.422
91.406
91.625
Sep 28, 2026
91.625
91.594
91.688
Sep 25, 2026
91.969
91.938
92.219
Sep 24, 2026
92.297
92.281
92.063
Sep 23, 2026
92.953
92.938
92.688
Sep 22, 2026
93.719
93.688
93.750
Sep 21, 2026
93.688
93.656
93.844
Sep 18, 2026
93.422
93.406
93.281
Sep 17, 2026
93.750
93.719
93.844
Sep 16, 2026
94.047
94.031
93.375
Sep 15, 2026
93.922
93.906
93.875
Sep 14, 2026
94.188
94.156
94.031
Sep 11, 2026
94.313
94.281
94.031
Sep 10, 2026
94.750
94.719
94.469
Sep 9, 2026
95.141
95.094
95.219
Sep 8, 2026
95.453
95.438
95.438
Sep 4, 2026
95.422
95.406
95.438
Sep 3, 2026
95.750
95.719
95.500
Sep 2, 2026
95.281
95.250
95.250
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.
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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.