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
2.759%
Index ratio
1.1210
Real duration
5.978 yr
DV01
0.0543
Convexity
0.396
Real clean price
90.625
Accrued (real)
0.238
Real dirty price
90.863
Indexed principal
112.100
Money clean price
101.590
The index ratio is a multiplier, not a percentage: 1.1210 means the principal is worth that many times its original face today. So the real clean price of 90.625 is not what a buyer pays , multiply by the ratio to get 101.590 per 100 of original face.
Against the fitted real curve
Priced 1.6 bp cheap to the real curve on that day, 8.51 cents per 100 of face.
That is -1.26 standard deviations from its own typical residual.
Real yield, 920 observations
Price history
920 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CGK1.
Date
Bid
Offer
Close
Sep 30, 2026
90.750
90.719
90.625
Sep 29, 2026
90.531
90.500
90.719
Sep 28, 2026
90.688
90.656
90.688
Sep 25, 2026
90.953
90.938
91.094
Sep 24, 2026
91.031
91.000
90.875
Sep 23, 2026
91.406
91.375
91.219
Sep 22, 2026
92.000
91.969
91.969
Sep 21, 2026
91.953
91.906
92.031
Sep 18, 2026
91.875
91.844
91.719
Sep 17, 2026
92.125
92.094
92.156
Sep 16, 2026
92.438
92.406
91.844
Sep 15, 2026
92.375
92.344
92.281
Sep 14, 2026
92.547
92.531
92.406
Sep 11, 2026
92.688
92.656
92.469
Sep 10, 2026
93.094
93.063
92.875
Sep 9, 2026
93.391
93.344
93.406
Sep 8, 2026
93.594
93.563
93.563
Sep 4, 2026
93.594
93.563
93.563
Sep 3, 2026
93.875
93.844
93.688
Sep 2, 2026
93.531
93.500
93.500
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.