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, November 9, 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
3.115%
Index ratio
1.3335
Real duration
18.970 yr
DV01
0.1261
Convexity
4.06
Real clean price
66.219
Accrued (real)
0.236
Real dirty price
66.455
Indexed principal
133.355
Money clean price
88.306
The index ratio is a multiplier, not a percentage: 1.3335 means the principal is worth that many times its original face today. So the real clean price of 66.219 is not what a buyer pays , multiply by the ratio to get 88.306 per 100 of original face.
Against the fitted real curve
Priced 2.3 bp rich to the real curve on that day, 29.08 cents per 100 of face.
That is -2.59 standard deviations from its own typical residual.
Real yield, 1,926 observations
Price history
1,926 trading days to Nov 9, 2026
The most recent 20 trading days of prices for 912810SG4.
Date
Bid
Offer
Close
Nov 9, 2026
66.281
66.344
66.219
Nov 6, 2026
66.625
66.688
66.438
Nov 5, 2026
66.500
66.594
66.594
Nov 4, 2026
65.938
66.000
66.281
Nov 3, 2026
66.281
66.375
66.125
Nov 2, 2026
66.938
67.000
66.438
Oct 30, 2026
66.406
66.469
66.250
Oct 29, 2026
66.500
66.563
66.406
Oct 28, 2026
66.344
66.406
65.906
Oct 27, 2026
66.531
66.594
66.625
Oct 26, 2026
66.375
66.453
66.375
Oct 23, 2026
66.469
66.531
66.281
Oct 22, 2026
66.125
66.203
66.688
Oct 21, 2026
65.438
65.516
65.375
Oct 20, 2026
65.125
65.203
65.250
Oct 19, 2026
64.844
64.906
64.531
Oct 16, 2026
65.375
65.453
65.250
Oct 15, 2026
65.063
65.156
64.969
Oct 14, 2026
63.750
63.828
64.188
Oct 13, 2026
63.688
63.766
63.688
Prices are per 100 of face, from Treasury's own end-of-day file. A dash means that side was not quoted that day, which is almost always the offer and almost always near maturity: a holder of a bill days from paying par has little reason to sell it.
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.
Free to benchmark against. Paid only to track. Measuring anything against these curves and indices is free. No license, no fee, no registration, and no permission needed to say that you did, including in a prospectus. A fee applies to one thing: launching a product that tracks an index.
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.