1.875% Treasury bond due 15 Nov 2051
ISIN US912810TB44 · CUSIP 912810TB4
Estimated from the Treasury curve, not a dealer quote. Built from the Treasury's par curve of 1 Oct 2026.
- Yield to maturity
- 5.70%
- Modified duration
- 16.73
- Next coupon
- 15 Nov 2026
if held to maturity and every payment arrives, at this estimated price
years: for each point its yield moves, the price moves about 16.7% the other way
51 payments left · 0.71 accrued per 100
On 1 Oct 2026 the Treasury curve puts this security at an estimated 49.21 per 100, a yield of 5.70% if it is held to maturity and every payment arrives. It is a model estimate and can differ from the price at which the security trades.
The terms
- Coupon
- 1.875%
- Issued
- 15 Nov 2021
- Matures
- 15 Nov 2051
- Original term
- 30-year
- Outstanding
- $90.2B
- Day count
- actual/actual
paid twice a year, on the same two dates
25.1 years left
Bonds of November 2051
as of 31 Aug 2026
accrued interest follows the actual days of each coupon period
Price and risk, from the curve
- Accrued interest
- 0.708
- Full price
- 49.92
- Macaulay duration
- 17.21
- Convexity
- 368.2
- Price change per basis point
- 0.0835
per 100: the coupon earned since the last payment on 15 May 2026
the price plus accrued interest: what a buyer pays at settlement
years: the average time to its payments, weighted by their present value
how the duration itself changes as the yield moves
per 100: how much the price moves for a 0.01-point move in yield (DV01)
These come from a model, not from a market: the Treasury's par curve of 1 Oct 2026, turned into a discount factor for each payment of this security. They can differ from the price at which it trades, and the yield to maturity is what holding it to the end would earn if every payment arrives, at this estimated price. It is not a return anyone is owed: a different price, a sale before maturity or reinvesting at other rates all change what is actually earned. For a TIPS, or a security with twenty years or more to run, the gap can exceed half a point.
The auctions
The Treasury sells each security at auction. The first auction issues it; later ones, called reopenings, sell more of the same security.
| Auction | Kind | Offered | Accepted | Bid-to-cover | High yield |
|---|---|---|---|---|---|
| 13 Jan 2022 | Reopening | $22.0B | $25.5B | 2.35 | 2.075% |
| 9 Dec 2021 | Reopening | $22.0B | $25.2B | 2.22 | 1.895% |
| 10 Nov 2021 | New issue | $25.0B | $39.5B | 2.20 | 1.940% |
Bid-to-cover is the amount bid divided by the amount sold: 2.5 means bids for two and a half times what was sold. The high yield is the highest yield at which the Treasury accepted bids.
Other Treasuries maturing in 2051
Each measure, explained
Terms, auctions and amounts outstanding: U.S. Department of the Treasury, Bureau of the Fiscal Service, Fiscal Data (public data, free to reuse). Curve: the Treasury's daily par yield curve rates. The price, yield and risk figures are Sphinx Risk's own estimates from that curve. Nothing on this page is a recommendation to buy or sell anything. fiscaldata.treasury.gov ↗ · treasury.gov ↗