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, October 20, 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
3.189%
Index ratio
1.2852
Real duration
23.350 yr
DV01
0.1132
Convexity
5.66
Real clean price
48.438
Accrued (real)
0.023
Real dirty price
48.460
Indexed principal
128.520
Money clean price
62.252
The index ratio is a multiplier, not a percentage: 1.2852 means the principal is worth that many times its original face today. So the real clean price of 48.438 is not what a buyer pays , multiply by the ratio to get 62.252 per 100 of original face.
Against the fitted real curve
Priced 5.8 bp rich to the real curve on that day, 65.45 cents per 100 of face.
That is 0.01 standard deviations from its own typical residual.
Real yield, 1,415 observations
Price history
1,415 trading days to Oct 20, 2026
The most recent 20 trading days of prices for 912810SV1.
Date
Bid
Offer
Close
Oct 20, 2026
48.422
48.344
48.438
Oct 19, 2026
48.125
48.063
47.781
Oct 16, 2026
48.625
48.531
48.438
Oct 15, 2026
48.375
48.281
48.188
Oct 14, 2026
47.141
47.063
47.469
Oct 13, 2026
47.109
47.031
47.000
Oct 9, 2026
46.609
46.563
46.531
Oct 8, 2026
46.281
46.219
46.594
Oct 7, 2026
45.875
45.813
46.063
Oct 6, 2026
46.359
46.281
46.219
Oct 5, 2026
46.000
45.938
45.906
Oct 2, 2026
46.500
46.438
46.281
Oct 1, 2026
46.531
46.469
46.531
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
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.