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
2.689%
Index ratio
1.0796
Real duration
2.427 yr
DV01
0.0242
Convexity
0.0722
Real clean price
98.625
Accrued (real)
0.981
Real dirty price
99.606
Indexed principal
107.957
Money clean price
106.472
The index ratio is a multiplier, not a percentage: 1.0796 means the principal is worth that many times its original face today. So the real clean price of 98.625 is not what a buyer pays , multiply by the ratio to get 106.472 per 100 of original face.
Against the fitted real curve
Priced 9.0 bp cheap to the real curve on that day, 21.64 cents per 100 of face.
That is 0.97 standard deviations from its own typical residual.
Real yield, 606 observations
Price history
606 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CKL4.
Date
Bid
Offer
Close
Sep 30, 2026
98.688
98.656
98.625
Sep 29, 2026
98.484
98.469
98.563
Sep 28, 2026
98.563
98.531
98.531
Sep 25, 2026
98.672
98.656
98.719
Sep 24, 2026
98.609
98.594
98.563
Sep 23, 2026
98.688
98.656
98.594
Sep 22, 2026
98.891
98.875
98.875
Sep 21, 2026
98.938
98.906
98.875
Sep 18, 2026
98.969
98.938
98.875
Sep 17, 2026
99.094
99.063
99.125
Sep 16, 2026
99.391
99.375
99.000
Sep 15, 2026
99.391
99.375
99.313
Sep 14, 2026
99.469
99.438
99.344
Sep 11, 2026
99.500
99.469
99.375
Sep 10, 2026
99.813
99.781
99.719
Sep 9, 2026
99.938
99.906
99.906
Sep 8, 2026
100.000
99.969
99.969
Sep 4, 2026
99.938
99.906
99.938
Sep 3, 2026
100.078
100.063
100.000
Sep 2, 2026
99.938
99.906
99.875
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.
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.