---
author: Adam's Axiom
date: '2026-10-07'
guest: ''
layout: post.njk
source: https://www.youtube.com/watch?v=xlVSXOK88mE
speaker: Adam's Axiom
tags:
- sovereign-debt
- government-bonds
- refinancing
- macroeconomics
- interest-rate-risk
title: 全球政府债台高筑，钱究竟借给了谁？国家债务的底层运转逻辑
summary: 全球主要国家债务规模动辄达数万亿美元，但主权债务并非国与国之间的简单对冲。国家债务本质上是政府向本国及海外银行、养老基金和普通投资者发行的债券资产。通过借新还旧的再融资机制，政府得以在维持总债务存量的同时持续偿还到期债务，其核心风险在于利息承受力与再融资成本。
insight: ''
draft: true
series: ''
category: investment-assets
area: finance-wealth
project: []
people: []
companies_orgs:
- Bank of England
- World Bank
products_models: []
media_books: []
status: evergreen
---
### 债务错觉：国家并非借贷同体，债权人近在眼前
美国、中国、日本和英国等国政府都背负着数万亿美元的巨额债务。人们常常困惑：如果每个国家都在借钱，那究竟是谁在借出资金？各国是否只是在互相转手资金？如果真是这样，各国为何不能坐下来核对账目、互相抵消债务？
解开这个谜题的首要线索在于：**一个国家政府与居住在该国境内的居民并不是同一个借款主体**。政府的债权人包括**商业银行**、**养老基金**以及海内外的普通投资者。因此，一个国家的部分国债，本质上其实是普通公众的退休储蓄。然而，这些借贷者期望获得资金回报。当政府长期深陷债务时，这种偿还是如何实现的？
我们可以追踪100美元的具体流向。假设普通人 Sam 存了100美元，而政府正好需要借这笔钱。政府向 Sam 发行了一张**国债**（Government Bond: 政府向投资者发行的还本付息契约）。在约定的条款下，Sam 今天支付100美元**本金**（Principal: 初始借款金额），政府承诺一年后归还这100美元，并额外支付5美元**利息**（Interest: 借出资金的报酬）。此时，Sam 手头的现金减少了，但他获得了一项具有价值的资产——即对政府未来支付的索偿权。对于政府而言这是一笔负债，而对 Sam 而言则是一项投资。
政府借款既可用于弥补税收不足的财政开支，也可用于偿还早期的旧债。Sam 的100美元汇入了国库资金池，它并不会专门对应某一块写着 Sam 名字的道路路标。各国使用的债务工具各不相同：英国的政府债券被称为**金边债券**（Gilts: 英国政府发行的主权债务工具），日本则发行**日本国债**（Japanese Government Bonds: 日本发行的主权债券）。
国债还具备一个关键特征：绝大多数国债在到期偿还之前可以转售给其他人。如果 Sam 提前需要现金，另一位投资者可以买下该债券并享有后续的本息索偿权。转售过程中，政府并不会获得第二笔100美元，而债券的市场交易价格也会随行情波动。因此，当我们探讨政府欠谁的钱时，必须考察究竟是谁在持有这些债务，而这往往与最初出借资金的人截然不同。
Original English Source
the governments of america, china, japan in britain all have huge debts. we're talking trillions. so if they're all borrowing who's doing the lending, are countries just passing money back in forth. and if they are couldn't they sit down, compare the bills and call it even it would be a surprisingly productive meeting.
the first clue is that a government and the people living in its country aren't the same borrower. governments can owe money to banks, pension funds and ordinary investors, both at home and abroad. so part of a country's debt can be somebody else's retirement savings. but those lenders expect to be paid back. how does that happen when governments stay in debt?
let's follow a hundred dollars. suppose sam has a hundred saved, and a government wants to borrow this. this is a made up example with deliberately tidy numbers, the government offers sam a bond that sounds more mysterious than it is a promise to repay money on agreed terms, which sam can own. in our example, sam pays a hundred dollars today, the government promises to return that hundred in a year, plus five dollars in interest. the original hundred is called the principal. the five dollars is the payment for lending. sam now has less cash, but also has something valuable a claim on that future payment. the same agreement is a debt for the government and an investment for sam. we're describing it from opposite sides of the transaction.
the government can use borrowing to cover spending that its revenue doesn't cover. it can also use borrowing to repay earlier loans. we will come back to that because it explains why a government can issue enormous amounts of debt without spending all that money on new things. sam's hundred joins the government's available funds. it doesn't necessarily buy one particular road sign with sam's name on the back. governments use different instruments in different terms, britain calls its government bonds gilts, japan issues japanese government bonds. one year alone is a teaching example, not a particular product either country is offering.
there's useful feature. many government bonds can be sold to somebody else before repayment due. if sam wants the cash early, another investor might buy the bond that investor pays sam and becomes the person entitled to its remaining payments. the government doesn't receive a second hundred dollars just because its bond has changed hands, and sam isn't guaranteed to get the original price when selling the price can move. we're keeping that complication out of our little example, but it matters to real investors.
---
### 穿透持有结构：为何全球主权债务无法直接冲销
当我们厘清国债的持有者分布后，“国家之间互相借钱然后相互抵消”的构想便不攻自破。债权人往往并不遥远，它很可能就是管理你退休金的养老基金。如果养老基金持有政府债券，它所收到的本息回报正是支撑公众退休金的资金来源。基金拥有债券资产，普通参保人则通过退休金计划间接拥有权益。这解释了一个看似矛盾的现象：**一个人完全可以一边担忧国家债务高企，一边在财务上依赖国家债务按期偿付**。
这种安排并非美国所独有。中国财政部公布的数据显示，个人持有储蓄国债，同时商业银行等金融机构也持有大量国债。日本的国债持有结构涵盖商业银行、保险公司、养老基金、海外投资者以及**日本央行**。英国的金边债券同样由本国和海外各类投资者共同持有。各国的具体持债比例有所不同，但核心逻辑一致：**借款方写着国家的名字，并不代表贷款方也是国家**。尽管部分贷款确实来自其他主权政府或**世界银行**（World Bank: 为发展中国家提供资助和咨询的多边金融机构）等多边机构，但它们绝非政府唯一的信用来源。此外，部分美国联邦债务由政府内部信托基金持有，各国央行也持有大量政府债券。
基于这种权利关系，我们可以检验“债务完全对冲抵消”的设想。如果我欠你100美元，同时你欠我100美元且今日都到期，我们协议冲销后无需发生实际现金流动，这种两方之间的减法完全可行。但现实情况是：A国政府欠 Sam 100美元，而 B国政府欠 Priya 100美元。虽然两国均背负债务，但 Sam 和 Priya 之间没有任何借贷关系，彼此并不相欠。即使两者进行跨国投资，契约主体、计价货币与到期时间依然完全不同。**地图上的国界重合无法代替具体的合同关系**。
单方面取消 Sam 的债券虽然免除了政府的偿债义务，却直接剥夺了 Sam 合法的资产索偿权——这意味着 Sam 并没有收回属于他的本息，而是财富被彻底抹去。当持有者是养老基金时，抹去资产将直接损害退休福利的储备池。因此，“全世界只是自己欠自己钱”充其量只是一个粗糙的概念起点，而非严密的解释：**期待获得资金清偿的人，与承担最终还款义务的人，在法律和经济上绝非同一个人**。
Original English Source
so when we ask who a government owes, we need to look at who holds its debt. now that may be someone quite different from whoever first supplied the money. and once we look at those holders, the idea of countries just lending to other countries starts to fall apart. the creditor might be much closer than another country. it could be a fund looking after your pension. if that fund owns government bonds, the money it receives helps support people's pensions. the fund owns the bonds, the members have a stake through their pension scheme. that doesn't mean each interest payment goes straight into somebody's account, or that every pension owns the same investments, but it does explain how someone can worry about national debt while also having a financial stake in some of it being repaid.
and this isn't an arrangement peculiar to america. china's finance ministry reports government savings bonds held by individuals, alongside bonds held by institutions such as commercial banks. japan's debt holder figures include banks, insurers, pension funds, overseas investors and the bank of japan. britain's gilts also have domestic overseas holders. the proportions differ. the central point is that a country's name on the borrowing side doesn't tell you who is on the lending side.
some loans do come from other governments or international institutions, such as the world bank, those matter, especially for some borrowers, but they aren't the only places governments can get credit, even public institutions don't all have the same role. some american federal debt is held in government accounts, including trust funds, central banks can hold government bonds, too. those arrangements work differently from sam buying a bond with savings. we will return to central banks shortly.
so now we can test the idea of cancelling everything. suppose i owe you a hundred dollars, and you owe me one hundred dollars, both due today. if we agree to settle them against each other, neither of us needs to hand over any cash that works. the world has not been waiting for us to discover a subtraction, but now suppose one government owes sam a hundred dollars, while another government owes priya a hundred dollars, both countries have debt. there is nothing there to cancel between sam and priya, neither owes the other anything. even if sam and priya invest across each other's borders, it still matters exactly who owes whom in which currency and when payment is due. matching the countries on a map doesn't match the contracts.
cancelling sam's bond would remove the government obligation, but it would remove sam's claim. sam hasn't received the hundred dollars back. the hundred dollars is no longer owed. those are very different outcomes. if you're sam, the same distinction matters when a pension fund is the holder. removing one of its assets can affect the resources backing retirement benefits, putting everyone under the same flag doesn't make those interests identical. that's why saying the world owes money to itself is a starting point, not a complete explanation. the people expecting payments aren't interchangeable with the people making them, we can now identify the creditor without inventing one fabulously wealthy country,
---
### 再融资引擎：借新还旧的运作机制与利率重估风险
既然政府并未将债权凭证凭空抹除，那么当一年期满、政府依然负债累累时，它从何处获得资金偿还 Sam？
假设一年期限届满，政府需要向 Sam 支付100美元本金和5美元利息。政府可以使用现有的财政结余，但现实中更普遍的操作是进行**再融资**（Refinancing: 发行新债以偿还到期旧债的资本替换过程）。政府向新投资者发行一份新的100美元债券，并利用新筹集到的100美元全额归还 Sam 的本金；至于5美元的利息，则由日常税收资金支付。此时，Sam 拿回了105美元现金，旧债券注销；新投资者持有新债券，而政府账面上依然保持着100美元的本金负债。在这个过程中，债权人切实拿回了钱，只是国家的债务总额没有清零。
这种再融资机制清晰地解释了：**为何具体债权人能够按期收回投资，而国家的债务规模却常年高居不下**。例如，**英国债务管理局**（Debt Management Office: 负责英国政府发债与现金管理的法定机构）明确表示，发行金边债券既用于弥补新增财政支出，也用于偿还到期的存量旧债；中国财政收支账目同样对新发行额、还本额与付息额进行分别列示。借入100美元同时归还100美元，债务存量本身并未增加；只有当政府为了额外开支多借入20美元时，总负债才会上升至120美元。因此，在评估政府借债规模时，必须区分借款是用于置换到期债务，还是用于扩大净负债。
对于单个投资者而言，核心诉求在于约定的款项能否按时到账。政府无需在同一个下午还清所有债权人的债务，债权人也不会等待全国债务清零才要求兑付。然而，再融资的核心隐患在于：**新入场的投资者并不保证接受与过去相同的借贷条件**。
如果新发行的一年期债券仍要募集100美元，但由于市场环境变化，政府必须承诺支付8美元利息才能吸引买家，那么这笔再融资的年利息成本就从5美元飙升至8美元。虽然存量的固定利率债券利息不会在一夜之间上涨，但随着旧债密集到期进入再融资阶段，或者浮动利率及通胀挂钩债务面临调整，财政付息压力就会集中爆发。如果市场对政府信用产生疑虑、不愿以可承受的利率接盘，旧债滚动就会面临断裂风险。
Original English Source
but there's still a hundred dollars due to sam. where does the government find it? if it remains in debt? let's suppose sam kept the bond and the year is over. the government now owes the original hundred dollars. and five dollars in interest, it could pay both from money it already has available, but there's another possibility it can borrow again. a new investor buys a newly issued bond for a hundred dollars. the government uses that hundred to repay sam's principal. assume for this example that it covers the five dollars of interest from tax revenue. sam has now received the full hundred and five. the old bond is finished. the new investor holds a new bond, and the government still owes a hundred dollars of principal. nobody has to pretend sam was paid. sam has the money. it's the total debt that hasn't gone away.
this is refinancing replacing an old borrowing obligation with a new one. it helps explain how individual lenders can be repaid while the country's debt remains enormous. the british debt management office explicitly says it issues gilts both to finance spending and to refinance maturing debt. china's government debt accounts separately report new issuance, principal repayments and interest payments. governments really do repay particular debts, repaying every debt without replacing any of it would be a different undertaking and refinancing the same hundred isn't by itself an increase in the debt. in our example, one hundred goes out and another hundred comes in. if the government also borrowed twenty dollars to cover additional spending beyond its revenue, the total owed becomes one hundred and twenty. that distinction matters.
when you hear how much a government plans to borrow, some of the borrowing may replace loans coming due, some may enter the amount outstanding for an investor. the immediate question is whether the agreed payments will arrive. the government doesn't have to clear every other creditor's balance on the same afternoon. sam has not agreed to wait until the entire national debt is settled, but the next investor doesn't have to offer the same terms. suppose a new one-year bond still raises a hundred dollars, but now the government has to promise eight dollars in interest to attract a buyer. the principal is unchanged. the annual interest cost on that replacement borrowing has risen from five dollars to eight. existing fixed-rate bonds don't all start paying higher interest that morning, the pressure builds as debt needs refinancing or through debt whose payments can change with rates or inflation. so a government may keep paying its lenders while paying more and more to do it. if lenders become unwilling to renew loans on affordable terms, replacing the old debt becomes much harder.
---
### 债务的可持续边界：生产率、外债敞口与央行资产负债表
搞清楚债权人是谁，解开了“谁在借钱”的谜团；但如何确保债务偿付持续可控，才是真正带来挑战的部分。一个背负巨额债务的政府完全可能轻松完成履约，而另一个负债规模小得多的政府反而可能陷入违约危机。单纯看债务数字后面有几个零，并不能反映政府账面上的实际偿债资源，也无法体现借款的综合成本。
债务的可持续性很大程度上取决于**借贷资金的使用效率与经济回报**。如果借款投资于高效的基础设施网络，促进了物流与就业流动，从而做大了经济体量并拓宽了税基，这种债务就具备自我支撑的潜力；借款还能帮助政府应对突发公共紧急事件，避免短期内强行筹措全部资金的休克疗法。相反，如果巨额借款被浪费在毫无实际需求的形象工程上，资产无法产生效益，而债务利息依然刚性存在。当利息支出吞噬越来越多的财政收入时，政府的政策调整空间就会被大幅挤压，最终不得不通过提高税收、削减公共支出或进一步扩大借债来维持运转——而这些选择绝不存在所谓的“无痛方案”。
此外，**债务计价货币**直接决定了主权违约的风险等级。如果一个政府借入的是100美元外债，但自身的税收完全由本国货币构成，一旦汇率贬值（例如从1比1贬至1.5比1），偿还同一笔外债就需要支出150单位本币。外币计价的欠款本身没有增加，但本币偿债负担却大幅加重。即便中央银行拥有本币印钞权，也无法凭空制造用于还债的外国美元。
这就引出了中央银行作为政府债权人的特殊角色。在**量化宽松**（Quantitative Easing: 央行通过创造数字货币在二级市场大规模购买国债等资产的货币政策）背景下，央行通过新创造的资金从投资者手中购入国债。以**英格兰银行**（Bank of England: 英国的中央银行）为例，央行买入国债后，卖方获得资金，债券归入央行资产负债表。然而，这一交易同时在商业银行处创造了央行准备金，英格兰银行需要对这些准备金支付利息。因此，将政府与央行视为统一整体来看，央行持有国债并不意味着政府获得了“免费资金”，它只是改变了负债与利息支付的形式，并使财政成本对短期基准利率的变动更加敏感。
归根结底，国家欠钱并不是一个虚幻的数字游戏，它切实欠款于持有债券的境内外普通居民、投资基金、商业银行、多边机构以及中央银行。债务不会自动对冲冲销，但可以通过合理的再融资循环接力。评估国家债务，最关键的维度并非单纯的万亿规模，而是：**这些债务究竟流向了谁的手中、它们支撑了怎样的现实资产，以及未来的本息支付是否仍在财政承受范围之内**。
Original English Source
finding the creditors explains the puzzle, keeping the payments manageable is the part that can cause trouble. a government can owe a vast amount and still make its payments. another can struggle with a much smaller debt. the number of zeroes doesn't tell you what resources are available when the bills arrive, or how expensive the loan will be. what the borrowing achieved matters too. a useful transport link might help businesses move goods and people reach jobs that can support a larger economy and a stronger tax base. borrowing can also help a government respond to an emergency without finding all the money immediately, but a loan doesn't make a project useful. a very expensive bridge to somewhere nobody needs to go still has interest attached. when debt payments absorbed more of a government's resources, there is less room for other choices, unless revenue or financing changes. it might raise more tax, adjust spending or borrow more. those choices affect different people in different ways. there isn't a button labelled painless solution, although election campaigns occasionally suggest otherwise.
the currency of the debt matters as well. suppose a government owes a hundred US dollars, but collects taxes in another currency. if buying each dollar used to cost one local unit and now costs one and a half that same payment takes one hundred and fifty local units. the dollar bill hasn't grown paying it has become harder. foreign currency income or assets could help cover that exposure, but a central bank that issues the local currency can't simply create the foreign dollars, and a foreign investor holding a local currency bond is a different situation. the investor's address doesn't determine the currency the government owes.
that brings us to the central banks on the creditor list. if a central bank can create money and buy government bonds, does that make the debt disappear? take britain's quantitative easing program. the bank of england bought bonds from investors with newly created central bank money. the seller received payment in exchange for the bond. the government bond then sat within the central bank's holdings. instead, the transaction also created balances the commercial banks hold at the central bank called reserves. in britain, the bank of england pays interest on those balances. so look at the government and central bank together, buying the bond hasn't automatically made their funding free. they've changed the kind of payment they owe, and how quickly its cost can change when interest rates move.
that is why we need to ask more than whether a country owes money to itself. a bond holder receives interest, but returned principal is money being paid back, not all profit. people also benefit from the services or investment borrowing helped finance. the people receiving those benefits, paying taxes and owning the bonds may overlap, but they aren't necessarily the same people all affected equally. so who do countries owe money to? to the people and institutions holding their bonds and other loans: investors at home and abroad, funds, banks, central banks, other governments and international lenders. those debts don't automatically cancel because the claims belong to particular holders, and a lender can be repaid while the government remains in debt because a new loan can replace the old one. the useful questions are who gets paid, what the borrowing made possible, and whether the payments remain manageable. the trillions get your attention; following the payments tells you what they mean.