You open TreasuryDirect, pick a 10-year note, and type in $1,000. Nowhere does the screen show a price or a rate. That is not a bug. Every new Treasury security is sold at auction, and the price does not exist until bidding closes.
Three Dates: Announcement, Auction, Settlement
Every auction runs the same three steps.
First the announcement, a few days ahead. Treasury publishes what it is selling, how much, the auction date, the issue date, and the bidding deadlines.
Then auction day. Bids close at set times, and the window for noncompetitive bids shuts first, in the late morning, with competitive bidding running on into the early afternoon. Results are published within minutes of the close.
Last, settlement, which Treasury calls the issue date. The security appears in your account and the money leaves the bank account you designated. That is usually a few days after the auction, so your cash stays put until then.
A Competitive Bid Names a Yield
A competitive bidder states two things: how much they want, and the yield they will accept. Name 4.05% and you are telling Treasury you will not lend for less.
Treasury fills these from the cheapest borrowing cost upward. It starts at the lowest yield bid and works up, taking bids at each higher yield, until the whole offering is spoken for. The yield it stops at is the last one accepted.
Bid at or below that point and you are filled. Bid above it and you get nothing at all. No single competitive bidder can win more than 35% of the offering.
A Noncompetitive Bid Names Only an Amount
The other bid type asks for one number: how much you want. You agree in advance to take whatever yield the auction produces.
Since you have named no price, there is no price you can get wrong. Noncompetitive bids also come off the top, before Treasury looks at a single competitive bid, so they always fill in full. That is the trade. You give up any chance of holding out for a better yield, and you are guaranteed the amount you asked for.
The limits are $100 minimum, $100 increments, and $10 million per auction. TreasuryDirect takes noncompetitive bids only, which is why it never asks you for a rate. You cannot bid both ways in the same auction. A big institution that wants a particular yield, or wants more than $10 million, has to bid competitively and accept the risk of winning nothing.
Why Everyone Pays the Same Price
Treasury runs single-price auctions, also called Dutch auctions. Every winner pays one price, and that price comes from the highest accepted yield.
Made-up numbers, to watch it work. Treasury offers 100 units. Noncompetitive bids total 10 and come out first, leaving 90. Competitive bids arrive at three yields: 40 units at 4.00%, 30 at 4.05%, and 50 at 4.10%. Treasury takes the 40, then the 30, then 20 units' worth from the last group, split in proportion among them. The high yield is 4.10%.
Here is the part that matters. The bidder who asked for 4.00% does not receive 4.00%. They receive 4.10%, like everyone else. So does every noncompetitive buyer, including the one who put in $100.
That single rule is what makes a small buyer's outcome identical to a pension fund's. No worse retail price, no bulk discount, because there is only one price.
Treasury ran most auctions the other way until 1998, with each winner paying exactly what they bid. Single pricing removes the penalty for guessing too high, so bidders can bid closer to what they really think the security is worth.
Reading the High Yield and the Bid to Cover
Two numbers lead the results, and both are worth knowing even if you never bid competitively.
The high yield (the high rate, on a bill) is that stopping point. It is the yield everyone was awarded at, so it is your yield. Traders compare it against where the security was trading just before the deadline. Landing above that guess means buyers demanded more to show up.
The bid to cover ratio is total dollars bid divided by total dollars accepted. Above 1 means more money wanted in than Treasury was selling. Below 1 would mean the offering went uncovered, which is why the number gets read as a demand gauge.
Neither number changes your fill. The rules decided that, not the mood in the room.
Primary Dealers Are Required to Show Up
Primary dealers are banks and broker-dealers the Federal Reserve Bank of New York names as its trading counterparties. The designation carries a standing expectation: bid in every Treasury auction, at reasonably competitive prices, for roughly a pro rata share of what is offered.
That obligation is why an auction going unsold is close to unthinkable. A floor of bidders turns up whatever else is happening. Dealers resell most of what they win into the secondary market, which is where the older bonds on a brokerage's bond desk come from.
Bidding Direct or Through a Broker
TreasuryDirect sends your bid straight to Treasury. Noncompetitive only, no commission, and the security sits in your TreasuryDirect account.
A bank, broker or dealer can submit the same bid for you instead. They pass your order through to the auction, so you buy at the identical auction price rather than from their inventory. The security lands in your regular investment account, which is what lets you sell before maturity. Competitive bids run through this channel too, since TreasuryDirect will not take one.
Where the bond lives afterward, and what the channel costs, is covered elsewhere on this site. The auction itself treats the two bids exactly alike.
