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
2.665%
Index ratio
1.1493
Real duration
5.604 yr
DV01
0.0500
Convexity
0.346
Real clean price
89.125
Accrued (real)
0.132
Real dirty price
89.257
Indexed principal
114.927
Money clean price
102.429
The index ratio is a multiplier, not a percentage: 1.1493 means the principal is worth that many times its original face today. So the real clean price of 89.125 is not what a buyer pays , multiply by the ratio to get 102.429 per 100 of original face.
Against the fitted real curve
Priced 4.9 bp rich to the real curve on that day, 24.63 cents per 100 of face.
That is -0.95 standard deviations from its own typical residual.
Real yield, 1,045 observations
Price history
1,045 trading days to Sep 30, 2026
The most recent 20 trading days of prices for 91282CEZ0.
Date
Bid
Offer
Close
Sep 30, 2026
89.250
89.219
89.125
Sep 29, 2026
89.016
89.000
89.188
Sep 28, 2026
89.172
89.156
89.156
Sep 25, 2026
89.391
89.375
89.531
Sep 24, 2026
89.438
89.406
89.281
Sep 23, 2026
89.781
89.750
89.594
Sep 22, 2026
90.313
90.281
90.281
Sep 21, 2026
90.297
90.250
90.375
Sep 18, 2026
90.188
90.156
90.094
Sep 17, 2026
90.438
90.406
90.469
Sep 16, 2026
90.750
90.719
90.188
Sep 15, 2026
90.688
90.656
90.625
Sep 14, 2026
90.844
90.813
90.688
Sep 11, 2026
90.969
90.938
90.781
Sep 10, 2026
91.375
91.344
91.156
Sep 9, 2026
91.641
91.594
91.656
Sep 8, 2026
91.844
91.813
91.813
Sep 4, 2026
91.813
91.781
91.813
Sep 3, 2026
92.078
92.063
91.906
Sep 2, 2026
91.750
91.719
91.719
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.
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.
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.