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
3.368%
Index ratio
1.2826
Real duration
23.366 yr
DV01
0.1084
Convexity
5.67
Real clean price
46.375
Accrued (real)
0.016
Real dirty price
46.391
Indexed principal
128.257
Money clean price
59.479
The index ratio is a multiplier, not a percentage: 1.2826 means the principal is worth that many times its original face today. So the real clean price of 46.375 is not what a buyer pays , multiply by the ratio to get 59.479 per 100 of original face.
Against the fitted real curve
Priced 5.4 bp rich to the real curve on that day, 58.14 cents per 100 of face.
That is 0.55 standard deviations from its own typical residual.
Real yield, 1,402 observations
Price history
1,402 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 912810SV1.
Date
Bid
Offer
Close
Sep 30, 2026
46.547
46.500
46.375
Sep 29, 2026
46.625
46.563
46.781
Sep 28, 2026
46.906
46.844
46.906
Sep 25, 2026
47.375
47.313
47.563
Sep 24, 2026
48.063
48.000
47.719
Sep 23, 2026
48.875
48.813
48.594
Sep 22, 2026
49.750
49.688
49.719
Sep 21, 2026
49.766
49.688
49.938
Sep 18, 2026
49.281
49.219
49.156
Sep 17, 2026
49.516
49.438
49.656
Sep 16, 2026
49.625
49.563
49.188
Sep 15, 2026
49.313
49.250
49.281
Sep 14, 2026
49.656
49.594
49.500
Sep 11, 2026
49.719
49.656
49.344
Sep 10, 2026
49.844
49.781
49.469
Sep 9, 2026
50.172
50.094
50.281
Sep 8, 2026
50.672
50.594
50.531
Sep 4, 2026
50.500
50.438
50.500
Sep 3, 2026
50.750
50.688
50.469
Sep 2, 2026
50.281
50.219
50.250
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.
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.