$39 billion at 4.538%: how one auction set the 10-year yield
The Treasury sold $39.0 billion of 10-year notes in June 2026 at one yield, 4.538%. The machinery that produced that number, from the primary sources.
- What happened
- The 10-year Treasury yield reached 5.00% on September 15, 2026 and stood at 5.17% on September 25, 2026. The level is set, roughly every four weeks, by an auction: the most recent one for which the Treasury has published full statistics sold $39.0 billion of 10-year notes at a stop-out yield of 4.538%, settling on June 15, 2026.
- Why
- Every buyer in a Treasury auction pays the same price, set by the highest yield the Treasury has to accept to sell the whole amount. Who bids, how much, and at what yield is published after every sale.
- The numbers that matter
- 4.538%Stop-out yield, 10-year note reopening settled June 15, 20262.57Bid-to-cover ratio at that auction78.2%Share of competitive awards to indirect bidders26Primary dealers on the New York Fed list, September 28, 2026
- Why it matters
- The auction yield is the rate the government pays on new borrowing and the anchor for the 30-year mortgage rate. Anyone with $100 can buy at the same yield as the largest bidder, through a non-competitive bid.
- What happens nextas we saw it on 28 Sep 2026
- The Treasury's tentative schedule lists the next 10-year note auction (a reopening) for Wednesday, October 7, 2026, announced October 1 and settling October 15; the next new 10-year note is scheduled for November 10, 2026.
Every point on this curve is the price of a Treasury security on that day; the 10-year point is re-set by auction about once a month.
| 1-year | 4.5% |
|---|---|
| 2-year | 4.8% |
| 5-year | 5.0% |
| 10-year | 5.2% |
| 30-year | 5.5% |
The number everyone quotes as “the 10-year yield” is not set by a committee or a screen. It is set by an auction the Treasury runs roughly every four weeks, in which the government sells a fixed quantity of bonds to whoever will accept the lowest yield, then pays every winner the same yield. The level itself — 5.00% on September 15, 2026, 5.17% on September 25 — is covered elsewhere. This piece is about the machinery.
We use one real sale throughout: the 10-year note reopening that settled on June 15, 2026. It is the most recent 10-year auction whose full Treasury statistics were retrievable on September 28, 2026. The Treasury's schedule listed a further reopening for September 9, 2026; its results release could not be fetched for this article, so we do not quote it.
The sale, in the Treasury's own numbers
| Measure | Figure | What it measures |
|---|---|---|
| Stop-out yield | 4.538% | The highest accepted competitive yield; every winner receives it |
| Competitive awards | $38.9 billion | Notes sold to bidders who named a yield |
| Non-competitive awards | $0.1 billion | Notes sold to bidders who accepted whatever yield the auction set |
| Bid-to-cover ratio | 2.57 | Dollars bid for every dollar sold |
| Indirect bidders | 78.2% | Share of competitive awards placed through a dealer (typically foreign and domestic institutions) |
| Direct bidders | 12.3% | Share of competitive awards placed directly with the Treasury by non-dealer institutions |
| Primary dealers | 9.5% | Share of competitive awards taken by the 26 firms obliged to bid |
| SOMA add-on | $0.0 billion | Federal Reserve reinvestment purchases at the auction yield |
The Treasury's August 2026 presentation to its borrowing advisory committee lists the 10-year note settled on June 15, 2026 with a stop-out rate of 4.538%, competitive awards of $38.9 billion, non-competitive awards of $0.1 billion and a bid-to-cover ratio of 2.57. The same table gives the two earlier 10-year sales of the quarter: 4.282% (settled April 15, 2026, bid-to-cover 2.43) and 4.468% (settled May 15, 2026, bid-to-cover 2.40).
Bid-to-cover is total bids divided by total awards. 2.57 × $39.0 billion = $100.2 billion of bids for $39.0 billion of notes. Applying the published award shares to the $38.9 billion of competitive awards: indirect bidders took 0.782 × 38.9 = $30.4 billion, direct bidders 0.123 × 38.9 = $4.8 billion, primary dealers 0.095 × 38.9 = $3.7 billion.
How a single-price auction works
The 10-year note is sold by what TreasuryDirect calls a single-price auction and traders call a Dutch auction. The Treasury announces the amount about a week ahead. Bidders submit either a competitive bid, naming the yield they want, or a non-competitive bid, accepting whatever yield the auction produces. At the close the Treasury ranks competitive bids from lowest yield to highest and accepts them in that order until the offering is filled. The yield of the last bid it has to accept is the stop-out, or high, yield.
TreasuryDirect's auction FAQ states: “All successful competitive bidders and all noncompetitive bidders are awarded securities at the price based on the highest rate, yield, or discount margin of awarded competitive tenders.” A bidder who asked for 4.40% at the June 2026 sale received 4.538%, the same as everyone else. A bidder who asked for 4.60% received nothing. The FAQ adds that competitive awards are “limited to 35% of the total offering amount minus net long position”, and that “Noncompetitive bids are limited to $10 million per auction.”
The design removes the winner's curse: a competitive bidder who names a low yield still gets the higher yield if the auction stops above it.
When-issued, tails, and who has to show up
Between the announcement and the auction, dealers trade the note before it exists. This when-issued market produces a continuous yield quote for the security about to be sold, and it is the yardstick the auction is judged against.
By market convention, the tail is the stop-out yield minus the when-issued yield at the moment bidding closes. A positive number (the auction cleared at a higher yield than the market expected) is called a tail and read as weak demand; a negative number is a stop-through and read as strong demand. The Treasury's TBAC statistics table does not report a tail for any auction, and this article does not quote one for the June 2026 sale.
Bid-to-cover and the bidder split are the other two measures traders read. A high indirect share is usually taken as end-investor demand rather than dealers absorbing paper they must bid for. At the June 2026 sale the indirect share was 78.2%, against 65.3% in April and 64.0% in May; the primary-dealer share was 9.5%, against 10.8% and 12.0%.
The Federal Reserve Bank of New York's primary dealer list, retrieved September 28, 2026, names 26 firms; the most recent change was the addition of MUFG Securities Americas Inc. effective January 15, 2026. The New York Fed states that primary dealers are expected “to bid on a pro-rata basis in all Treasury auctions at reasonably competitive prices.” They are the auction's backstop: 26 firms are required to bid, so the note is sold whatever happens.
Direct bidders bid for their own account without a dealer; indirect bidders bid through one, and foreign central banks and most large fund managers appear there.
Coupon, yield and price are three different numbers
A 10-year note carries a fixed coupon, paid every six months. The yield set at auction is what a buyer actually earns, and the price reconciles the two. When the auction yield is above the coupon, the note sells below its $100 face value; when it is below, the note sells above face. A reopening such as the June 2026 sale adds more of an existing note with a fixed coupon, so the price carries the whole adjustment.
Take a 10-year note with a 4.5% coupon paid in two halves of $2.25 per $100 of face value. Priced to yield 4.5%, it is worth exactly $100.00. Re-price the same 20 payments and the $100 repayment at 5.5%: the present value is $92.39. At 3.5% it is $108.38. The note did not change; the yield available elsewhere did. Inputs: 20 semi-annual periods, discount rate = yield ÷ 2, face $100.
The 10-year par yield rose from 4.83% on September 9, 2026 to 5.17% on September 25, 2026, a move of 0.34 percentage points. Holders of existing notes saw prices fall by that mechanism; the Treasury saw the cost of its next sale rise by the same amount.
Where the auction yield goes next
The Treasury's Quarterly Refunding Statement of August 5, 2026 offered $125 billion of securities to refund $96.3 billion of privately held notes and bonds maturing August 15, 2026, including “A 10-year note in the amount of $42 billion, maturing August 15, 2036.” It said Treasury “anticipates maintaining nominal coupon and FRN auction sizes for at least the next several quarters.”
0.04538 × $39.0 billion = $1.77 billion per year for ten years, in yield terms. Each auction re-sets the rate on a fresh slice of government debt; the yield on the stock of debt already issued does not change.
The same yield sets the floor under the mortgage market. Freddie Mac's 30-year fixed rate was 6.95% in the week of September 17, 2026; the 10-year yield closed at 5.00% on September 15, 2026. The gap of 1.95 percentage points is the mortgage spread; a borrower pays the auction yield plus that spread.
What it means for your money
A household can bid in the same auction as the primary dealers. TreasuryDirect's Treasury notes page states a minimum purchase of $100, in increments of $100, with interest paid every six months until maturity, and a non-competitive limit of $10 million per auction. The auction FAQ states that “In TreasuryDirect, you can only bid noncompetitively”, which means accepting the stop-out yield. At the June 2026 sale that would have been 4.538%.
- Open a TreasuryDirect account and pick the 10-year note; the Treasury's tentative schedule lists the next auction on October 7, 2026.
- Enter a non-competitive bid in multiples of $100. You receive the full amount at the auction's stop-out yield.
- The price is debited on the issue date, October 15, 2026 for that auction.
- Hold to maturity and the yield to maturity is what you earn: the semi-annual coupons plus the gap between what you paid and the $100 face value repaid at the end.
A $1,000 non-competitive award at a 4.538% yield to maturity is equivalent to $45.38 a year over ten years with coupons not reinvested (the cash coupon is the note's fixed rate; the difference is recovered as the discount to par at maturity). That figure is fixed on auction day. A price loss arises only from selling before maturity after yields have risen, as the $92.39 example shows; a holder to maturity is repaid $1,000 regardless of where the price went in between.
The wider context is the yield curve: on September 25, 2026 the Treasury's par curve ran from 4.50% at one year to 5.49% at 30 years, with the 10-year at 5.17%. Each point is re-set by its own auction. The Federal Reserve's target range of 3.75%–4.00%, set on September 16, 2026, sits below all of them; the auction, not the Fed, decides the ten-year number.
Sources
- Treasury Presentation to TBAC, Fiscal Year 2026 Q3 Report (August 2026), auction statistics: nominal coupons and FRNsU.S. Department of the Treasury · Sep 28, 2026 · Primary source
- Tentative Auction Schedule of U.S. Treasury Securities (August 2026 refunding)U.S. Department of the Treasury · Sep 28, 2026 · Primary source
- Tentative Auction Schedule of U.S. Treasury Securities, February–August 2026U.S. Department of the Treasury · Sep 28, 2026 · Primary source
- Daily Treasury Par Yield Curve Rates, September 2026U.S. Department of the Treasury · Sep 28, 2026 · Primary source
- Quarterly Refunding Statement of Deputy Assistant Secretary for Federal Finance Brian Smith, August 5, 2026U.S. Department of the Treasury · Sep 28, 2026 · Primary source
- Auction FAQsTreasuryDirect, Bureau of the Fiscal Service · Sep 28, 2026 · Primary source
- Treasury NotesTreasuryDirect, Bureau of the Fiscal Service · Sep 28, 2026 · Primary source
- Primary DealersFederal Reserve Bank of New York · Sep 28, 2026 · Primary source
- 10-Year Treasury Constant Maturity Rate (DGS10), observation of September 15, 2026U.S. Department of the Treasury via FRED · Sep 15, 2026 · Primary source
- Primary Mortgage Market Survey, week of September 17, 2026Freddie Mac · Sep 17, 2026 · Primary source
- FOMC statement, September 16, 2026Federal Reserve Board · Sep 16, 2026 · Primary source
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