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
2.703%
Index ratio
1.2046
Real duration
5.199 yr
DV01
0.0454
Convexity
0.297
Real clean price
87.375
Accrued (real)
0.026
Real dirty price
87.401
Indexed principal
120.460
Money clean price
105.252
The index ratio is a multiplier, not a percentage: 1.2046 means the principal is worth that many times its original face today. So the real clean price of 87.375 is not what a buyer pays , multiply by the ratio to get 105.252 per 100 of original face.
Against the fitted real curve
Priced 1.4 bp cheap to the real curve on that day, 6.41 cents per 100 of face.
That is 0.01 standard deviations from its own typical residual.
Real yield, 1,169 observations
Price history
1,169 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CDX6.
Date
Bid
Offer
Close
Sep 30, 2026
87.500
87.469
87.375
Sep 29, 2026
87.266
87.250
87.438
Sep 28, 2026
87.422
87.406
87.406
Sep 25, 2026
87.625
87.594
87.750
Sep 24, 2026
87.625
87.594
87.500
Sep 23, 2026
87.906
87.875
87.750
Sep 22, 2026
88.406
88.375
88.375
Sep 21, 2026
88.344
88.313
88.406
Sep 18, 2026
88.281
88.250
88.188
Sep 17, 2026
88.531
88.500
88.563
Sep 16, 2026
88.828
88.813
88.281
Sep 15, 2026
88.781
88.750
88.688
Sep 14, 2026
88.938
88.906
88.781
Sep 11, 2026
89.063
89.031
88.875
Sep 10, 2026
89.422
89.406
89.250
Sep 9, 2026
89.688
89.656
89.688
Sep 8, 2026
89.844
89.813
89.813
Sep 4, 2026
89.813
89.781
89.813
Sep 3, 2026
90.063
90.031
89.875
Sep 2, 2026
89.750
89.719
89.719
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.