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
2.612%
Index ratio
1.2459
Real duration
4.711 yr
DV01
0.0419
Convexity
0.246
Real clean price
88.875
Accrued (real)
0.026
Real dirty price
88.901
Indexed principal
124.587
Money clean price
110.726
The index ratio is a multiplier, not a percentage: 1.2459 means the principal is worth that many times its original face today. So the real clean price of 88.875 is not what a buyer pays , multiply by the ratio to get 110.726 per 100 of original face.
Against the fitted real curve
Priced 5.0 bp rich to the real curve on that day, 20.79 cents per 100 of face.
That is 1.19 standard deviations from its own typical residual.
Real yield, 1,294 observations
Price history
1,294 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CCM1.
Date
Bid
Offer
Close
Sep 30, 2026
89.031
89.000
88.875
Sep 29, 2026
88.813
88.781
88.969
Sep 28, 2026
88.938
88.906
88.906
Sep 25, 2026
89.125
89.094
89.250
Sep 24, 2026
89.125
89.094
89.000
Sep 23, 2026
89.359
89.344
89.188
Sep 22, 2026
89.797
89.781
89.781
Sep 21, 2026
89.750
89.719
89.813
Sep 18, 2026
89.703
89.688
89.594
Sep 17, 2026
89.938
89.906
89.969
Sep 16, 2026
90.266
90.250
89.719
Sep 15, 2026
90.219
90.188
90.125
Sep 14, 2026
90.359
90.344
90.219
Sep 11, 2026
90.469
90.438
90.281
Sep 10, 2026
90.828
90.813
90.656
Sep 9, 2026
91.094
91.063
91.063
Sep 8, 2026
91.219
91.188
91.188
Sep 4, 2026
91.188
91.156
91.188
Sep 3, 2026
91.406
91.375
91.250
Sep 2, 2026
91.109
91.094
91.063
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.