English edition ·
// l0g investigation · sovereign finance
The sovereign debt chain
From the first buyer to the final backstop
Who holds government debt when funding tightens? From the first buyer to central bank intervention, seven analyses follow a government bond through balance sheets, borrowing and collateral. This book brings the complete series into a continuous reading journey.
- 7
- complete analyses
- 40
- infographics
- EPUB 3
- offline reading
01 / introduction
One bond, several lives
A government can borrow for decades while a holder of its bonds needs cash before the day is over. Much of public finance takes place between those horizons. The state promises future payments; its creditor arranges the means to wait for them. This book follows those arrangements from the initial sale to the public interventions examined in the final chapter. It is written for readers who want to understand the market behind the announcements of government borrowing.
Who holds sovereign debt? At first the question seems to call for a list of institutions. The public records make their roles just as important as their names. A bank submitting a bid may represent a client. The successful buyer may sell the bonds on. A fund may retain them while borrowing part of the purchase price, and its lender may raise that cash elsewhere. Contracts combine these relationships in different ways. There is no single itinerary shared by every holder. The chapters use documented cases to make particular arrangements intelligible.
An original introduction opens the book and connects the seven analyses.
02 / reading journey
From the first buyer to the last resort
The seven complete articles, in reading order. Each chapter remains available online with its references and limitations.
01The first buyer
Price, face value and settlement: following a bond’s issuance in France and the United States.
02The price of a dealer’s balance sheet
Banks hold inventory, finance its owners and decide how much capacity to deploy.
03The buyers who borrow
The basis trade, futures and leverage: understanding a hedged position’s cash requirements.
04The collateral chain
Repo, reuse and clearing: following the lenders behind the lenders.
05The margin-call deadline
Collateral must arrive on time, testing liquidity buffers and management decisions.
06The price of getting out
A sale meets market depth, then the terms of subsequent government borrowing.
07The buyer of last resort
Outright purchases, secured loans and public risk: examining the rules of a backstop.
03 / reference
The language of funding
A glossary accompanies the book. These reference pages also support further reading online.
- Government bond auction
- A procedure that allocates securities based on submitted bids. French OAT auctions award each successful bid at its submitted price. US Treasury auctions award successful bids at a uniform price corresponding to the highest accepted yield, rate or discount margin. Bids, awards and settlement describe different stages.
- Bond coupon
- An interest payment specified by a bond’s terms. For a fixed-rate bond, the payment depends on face value and the contractual coupon rate, with the stipulated frequency. The buyer’s yield also depends on the purchase price and other cash flows; a secondary-market sale does not alter the issuer’s coupon.
- Repo
- The sale of a security with an agreement to repurchase it on agreed terms. Economically, it provides financing secured by that security. A repo can be overnight, longer term or open-ended; the repo rate and the collateral haircut are distinct parameters.
- Basis trade
- A strategy seeking to profit from the relative prices of a bond and a futures contract. Its long Treasury version combines buying the bond, selling the future and funding in repo. Returns depend on prices, coupons, funding costs and delivery terms. Hedging interest-rate risk leaves basis risk and margin-related liquidity needs.
- Collateral
- An asset provided to secure a debt, through a pledge or transfer of title according to the arrangement. If the borrower fails to meet its obligations, the lender may realise the asset under the contract and applicable law. For Eurosystem operations, collateral must be eligible and its recognised value reflects haircuts and other risk controls. Providing collateral creates borrowing capacity without creating bank equity.
- Rehypothecation
- Using received collateral in another transaction. Strictly, rehypothecation concerns pledged assets; reuse under a title-transfer repo involves an obligation to return equivalent securities. Rights depend on the contract and governing law. Reuse supports funding while connecting counterparties’ risks.
04 / conclusion
Follow the obligations to the end
At the end of this journey, the opening question has become more precise. Identifying a holder remains useful, but an institution’s name and a quantity of bonds cannot describe the whole arrangement. The purchase must be paid for, the supporting funds have a maturity, and other contracts may impose related obligations. Public debt remains a schedule of promised payments. As securities circulate, they enter private relationships whose deadlines and rights help shape their holders’ decisions.
The opening chapters therefore encourage a careful reading of financing announcements. Submitted bids are not all accepted. Awards come before settlement. Face value can differ from the cash raised. In the secondary market, a trade sends money to the seller of an existing security. That opportunity matters for subsequent issues without itself adding revenue to the Treasury. Following the flows makes it easier to assess an institution’s role before attributing a gain or a financing decision to an entire category of buyers.
The full conclusion connects the balance sheets, commitments and intervention conditions examined throughout the book.
05 / sources and edition
Read the contracts, dates and scope
Edition dated 12 October 2026. Documentary cut-off: 12 October 2026.
This book reproduces the seven investigations in l0g’s sovereign-debt series, published on 11 and 12 October 2026, with their sources and limitations. Factual examples in the introduction and conclusion refer to the corresponding chapters. The synthesis develops a reading of documented mechanisms and adds no numerical observations.
Text, contents, glossary and infographics are available offline. External sources require a connection. Image enlargement and displayed colours depend on your reading app.
The covers and panorama are conceptual illustrations created with AI assistance. The infographics retain the articles’ dates, units, sources and limitations.
Free, without registration, embedded scripts or tracking. Creative Commons Attribution 4.0 International.
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