What Is a Treasury Auction? How the US Sells Its Debt and How to Read the Results

A Treasury auction is how the US Treasury sells new bills, notes, bonds, TIPS and FRNs: bids fill from the lowest yield up, and every winner pays one price.

Every marketable security the Treasury issues is first sold this way, mostly on a published schedule, and the results are released shortly after bidding closes. This page covers what Treasury auctions sell, the cycle from announcement to settlement, how a single-price auction sets the yield and the coupon, who bids (primary dealers, direct and indirect bidders, and the Federal Reserve), how to read a results release line by line using a real 2-year note auction, what a "tail" means, and where Kresmion's free auction tracker shows the same figures. It is descriptive throughout.

What the Treasury auctions

The Treasury sells five kinds of marketable security at auction, set out in Treasury bills, notes and bonds:

The Treasury also sells cash management bills, short bills outside the regular schedule, which can only be bid for through a bank, broker or dealer.

A new auction can create a new security or reopen an existing one. In a reopening the Treasury sells more of a security already outstanding, with the same CUSIP, maturity date and coupon, so the coupon is not set by the auction. The buyer pays accrued interest from the last coupon date as well as the price. The most recently auctioned security at each maturity, called on-the-run, supplies the quotes behind the Treasury's daily yield curve, covered in what the yield curve shows.

The cycle: announcement, auction, settlement

The Treasury describes four steps: it announces the auction, holds it, takes bids, and issues the securities.

1. Announcement. A few days before the auction, the Treasury publishes the security, the amount offered, the auction date, the issue date, the maturity date and the bidding deadlines. 2. When-issued trading. From the announcement, dealers and investors trade the new security for delivery on the issue date. The New York Fed describes this when-issued (WI) market as trading in the new security after the announcement and before issuance. Bidders watch the WI yield as a gauge of demand going into the auction. 3. Auction day. For a note or bond, noncompetitive bids close at 12:00 noon Eastern time and competitive bids at 1:00 p.m., and the Treasury publishes the results shortly after. 4. Issue. On the issue date, the settlement date, the buyers pay and the securities are delivered.

For the 2-year note used in the example below, the cycle ran: announced Thursday 17 September 2026, auctioned Tuesday 22 September, issued Wednesday 30 September.

How a single-price auction works

Bids come in two kinds. A noncompetitive bid asks for a quantity only and takes whatever yield the auction sets; it is capped at $10 million per bidder per auction, and most individual investors bid this way. A competitive bid names the yield, discount rate or discount margin the bidder will accept, and a single bidder's award is capped at 35 percent of the offering amount, less any net long position it already holds in the security. A bidder can bid one way or the other in an auction, not both.

The rules, in the Treasury's Uniform Offering Circular (31 CFR Part 356), run in this order:

1. Accept every noncompetitive bid in full. 2. Accept competitive bids from the lowest yield upward until the offering is filled. 3. The yield of the last accepted bid is the high yield, also called the stop-out yield or the stop. Bids below it are filled in full; bids above it get nothing. 4. Bids exactly at the high yield usually exceed what is left, so each is filled in the same proportion. The results call this the percentage "allotted at high". 5. Every winning bidder, competitive or noncompetitive, pays the price that corresponds to the high yield.

That last rule is what makes it a single-price, or uniform-price, auction. A bidder who bid a lower yield still receives the higher one. The Treasury used a multiple-price format, in which each winner paid its own bid, from its first bill auctions in 1929; it began testing single-price auctions in 1992 with 2-year and 5-year notes and, according to New York Fed researchers Kenneth Garbade and Jeffrey Ingber, decided in October 1998 to extend the format to all auctions.

For a new note or bond the coupon is set after the bidding: the Treasury picks the coupon, in steps of 1/8 of a percentage point, that gives the price closest to, but not above, $100 at the high yield. That is why a new note almost always sells at or slightly below face value.

Who bids

The results release splits the competitive awards into three groups. The definitions are the Treasury's own:

• Primary dealers are the New York Fed's trading counterparties in monetary policy, bidding for their own account. The New York Fed's terms for the role ask each dealer to bid on a pro-rata basis in all Treasury auctions at reasonably competitive prices, so dealers bid large amounts in every auction.
• Direct bidders are any other firms bidding for their own account directly in the Treasury's bidding system: other dealers, funds, banks, insurers and others.
• Indirect bidders are customers who bid through a primary dealer or a direct submitter. Foreign central banks bidding through the New York Fed are counted here. The Treasury notes that neither the direct nor the indirect label says whether the bidder is domestic or foreign.

Two other amounts sit outside the competitive split. The Federal Reserve rolls its maturing Treasuries into new ones at auction, as its policy directive currently instructs; these System Open Market Account (SOMA) amounts are added on top of the offering rather than taken from it. FIMA noncompetitive bids are foreign official accounts bidding noncompetitively through the New York Fed. The Treasury separately publishes investor class allotments, a breakdown of each auction's awards by type of buyer, including foreign buyers as a group.

Reading a results release: the 2-year note of 22 September 2026

The Treasury's results release for the 2-year note (CUSIP 91282CRP8), auctioned 22 September 2026, read as follows. The offering amount was $69 billion.

Four readings from the release:

• The coupon and the price. At a yield of 4.787 percent, a 4-7/8 percent coupon would have priced above $100, so the Treasury set 4-3/4 percent, the highest 1/8 step that keeps the price at or below par. At 4.787 percent that coupon prices at 99.930225, the price every winning bidder paid.
• The bid-to-cover ratio divides the amount bid by the amount sold, both excluding the Fed's SOMA amount: $181.26 billion bid for $69.00 billion sold gives 2.63.
• The bidder split. Of the $67.69 billion of competitive awards, indirect bidders took $39.12 billion (57.8 percent), direct bidders $19.64 billion (29.0 percent) and primary dealers $8.93 billion (13.2 percent). The dealers had bid $101.13 billion, about 1.47 times the whole offering, consistent with their role of bidding in size at every auction; the other $92.20 billion went unfilled, either bid above the stop or cut back by the 33.42 percent proration at it.
• The spread of accepted bids. The high yield sat 4.9 basis points above the median and 12.7 above the low yield. "Low" here is the 5th percentile of accepted competitive bids, not the single lowest bid.

The same auction's price and coupon appear in Treasury bills, notes and bonds, which shows how bills are priced differently, and what a bond is explains why a yield above the coupon means a price below $100. The longer the security, the more a given yield gap moves its price, which bond duration measures.

For contrast, the 10-year note reopening of 7 October 2026 (the August 2036 note, coupon 4-5/8 percent) stopped at 5.300 percent, so it sold at 94.864261, well below par: in a reopening the coupon is fixed, and the yield had moved. Its bid-to-cover was 2.77, indirect bidders took 80.3 percent of the competitive awards and primary dealers 2.5 percent.

The tail and the when-issued yield

Market commentary often judges an auction by its tail: the gap between the high yield and the when-issued yield at the time of the auction. A high yield above the WI level means the Treasury sold at a higher yield than the market had been quoting. The Treasury's own studies of single-price auctions in the 1990s measured exactly this gap, the auction yield against the WI yield at the time of the auction, as Garbade and Ingber describe.

One caution. The WI yield comes from the dealer market, not from the Treasury, so the tail is not on the results release and different sources can report slightly different figures for the same auction. The results release does carry a related measure of its own: the gap between the high and the median yield, 4.9 basis points in the 2-year example.

Kresmion's Treasury auction tracker

Kresmion's free Treasury auction tracker, open with no account, lists the most recent completed bill, note, bond, TIPS and FRN auctions from the Treasury's published results with each one's high rate, high minus median in basis points, bid-to-cover, and the indirect, direct and primary-dealer shares of the competitive award. Each figure is ranked against the earlier auctions of the same tenor over the prior five years, and a tenor chart draws the history. On that ranking, the 10-year reopening of 7 October 2026 had a higher bid-to-cover and a lower primary-dealer share than any of the 60 earlier 10-year auctions since 7 October 2021. The tracker does not show the tail against the when-issued yield, because WI quotes are not part of the Treasury's published results. It also lists announced auctions not yet held, and a maturity ladder of all marketable Treasury debt by time to maturity.

Honest limitations

An auction result is a single event: the yield at which the Treasury sold on one afternoon, which the market moves from the next minute. Bidder categories describe how a bid was submitted, not who ultimately owns the securities or where they are based. Bid-to-cover counts amounts bid, and a bid far above the stop counts as cover as much as one at it. The figures here are from the Treasury's results for two auctions, read on 15 October 2026, and none of them describes how a later auction will go.

Key takeaways

Frequently asked questions

How does a Treasury auction set the yield?

The Treasury fills noncompetitive bids first, then accepts competitive bids from the lowest yield upward until the offering is sold. The yield of the last accepted bid is the high yield, and every winning bidder receives that yield and pays the matching price.

What does bid-to-cover mean?

It is the total amount bid divided by the amount sold, leaving out the Federal Reserve's rollover. A ratio of 2.63 means bidders asked for 2.63 times what the Treasury sold. It measures the quantity bid, not the yields at which it was bid.

What is the difference between direct and indirect bidders?

A direct bidder submits a bid for its own account straight into the Treasury's bidding system; an indirect bidder bids through a primary dealer or another direct submitter. Foreign central banks bidding through the New York Fed count as indirect, but the Treasury says neither label shows whether a bidder is foreign or domestic.

Can an individual buy at a Treasury auction?

Yes. Auctions are open to the public. Individuals can bid noncompetitively through TreasuryDirect or through a bank or broker, and receive the same yield as the large bidders, up to $10 million per auction. Competitive bids go through a bank, broker or dealer.

Does a weak auction mean yields will rise?

Not as a forecast. A low bid-to-cover, a large dealer share or a tail describes how one sale went against the market at that moment. Yields move afterwards on everything else that happens, and an auction result is one input among many.

This page is information, not investment advice.

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Source: US Treasury, Treasury Auction Results, 2-year note, 22 September 2026, https://www.treasurydirect.gov/instit/annceresult/press/preanre/2026/R_20260922_2.pdf ; US Treasury, Treasury Auction Results, 10-year note reopening, 7 October 2026, https://www.treasurydirect.gov/instit/annceresult/press/preanre/2026/R_20261007_2.pdf ; TreasuryDirect, auction query records for CUSIPs 91282CRP8 and 91282CRF0 (announcement and issue dates, SOMA, FIMA and bidder amounts), read 15 October 2026, https://www.treasurydirect.gov/auctions/auction-query/ ; TreasuryDirect, How Auctions Work, https://www.treasurydirect.gov/auctions/how-auctions-work/ ; TreasuryDirect, Auction FAQs (single-price auctions, bid types and limits, primary, direct and indirect bidders), https://www.treasurydirect.gov/help-center/faqs/auction-faqs/ ; 31 CFR 356.20 to 356.22 (determining awards, the coupon rule, proration and award limits), https://www.ecfr.gov/current/title-31/subtitle-B/chapter-II/subchapter-A/part-356 ; Federal Reserve Bank of New York, Primary Dealers, https://www.newyorkfed.org/markets/primarydealers ; Federal Reserve, Implementation Note issued 16 September 2026 (rollover of Treasury holdings at auction), https://www.federalreserve.gov/newsevents/pressreleases/monetary20260916a1.htm ; Kenneth D. Garbade and Jeffrey F. Ingber, "The Treasury Auction Process: Objectives, Structure, and Recent Adaptations", Federal Reserve Bank of New York Current Issues in Economics and Finance (2005), https://www.newyorkfed.org/medialibrary/media/research/current_issues/ci11-2.html ; Michael Fleming, Or Shachar and Peter Van Tassel, "Treasury Market When-Issued Trading Activity", Liberty Street Economics (2020), https://libertystreeteconomics.newyorkfed.org/2020/11/treasury-market-when-issued-trading-activity/ ; shares, ratios and yield gaps computed by Kresmion from the Treasury's figures ; Kresmion Treasury auction tracker, observed 15 October 2026.

Kresmion Research.