A sovereign treasury rolls billions every week through scheduled auctions. A corporate issuer might tap the market twice a year through a road-shown syndicate. Same instrument class, different plumbing.
A sovereign issuer is a national government borrowing in its own currency. Funding sources include scheduled auctions of fixed-coupon bonds, zero-coupon bills, inflation-linked bonds, and floating-rate notes.
Maturity buckets. Bills mature in one year or less, sold at discount with no coupon. Notes run 2 to 10 years. Bonds run beyond 10 years. The US Treasury uses 2, 3, 5, 7, 10, 20, and 30-year tenors. Other sovereigns follow similar ladders.
Auction mechanics. Most sovereigns use one of two formats:
- Single-price auction (Dutch): every winning bidder pays the same clearing yield (the highest accepted yield). The US Treasury uses this.
- Multiple-price auction: each winning bidder pays the yield they actually bid. Used historically by several European sovereigns.
KEY: Single-price auctions reduce the winner's curse (overbidding), which encourages aggressive bidding and lowers the sovereign's funding cost.
Common mistakes
- Confusing single-price with multiple-price auctions. Single-price: every winner pays the clearing yield. Multiple-price: each winner pays their own bid. Trap: writing that aggressive bidders pay less than the clearing yield in a single-price auction.
- Treating quasi-government bonds as risk-free. Only explicitly guaranteed agency debt (Ginnie Mae in the US) carries full sovereign backing. Fannie and Freddie are implicit. Trap: ignoring the 10-20 bp spread agencies carry over Treasuries.
- Conflating GO and revenue bonds. GO bonds are backed by taxing power. Revenue bonds are backed only by project cash flows. Trap: assuming a city's airport revenue bond can claim general tax receipts in default.
Bottom line
- Sovereigns issue T-bills (≤1y), notes (2-10y), bonds (>10y), plus inflation-linked variants, via scheduled auctions.
- Single-price auctions clear at one uniform yield; multiple-price auctions fill each bid at its own yield.
- On-the-run = most recent issue, most liquid benchmark, tightest spreads; off-the-run is older, less liquid, trades at a small yield concession.
- Non-sovereign debt splits into general-obligation bonds (backed by taxing power) and revenue bonds (backed only by project cash flows).
Exam shortcut
For auction format: "Single-price means same yield for all, Multiple-price means pay your bid." For issuer ranking by typical yield: Treasury < Supranational ≤ Explicit-guarantee agency < Implicit-guarantee agency < Investment-grade corporate. For the issuance contrast: sovereigns auction on a calendar, corporates negotiate with underwriters opportunistically. CFA Institute does not endorse, promote, review, or warrant the accuracy or quality of the products or services offered by FreeFellow LLC.
The full lesson (about 1,810 words, 12 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
- markets for government issuers
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