Credit and Trust

12 min read

Credit and Trust

The word “credit” comes from the Latin credere --- “to believe.” Every financial system runs on chains of belief, and when any link in the chain breaks, the system seizes.

What is it?

When you deposit money in a bank, the bank does not lock your coins in a box with your name on it. It records an entry on a ledger that says it owes you. When it lends that money to someone else, it records another entry. When the borrower spends it, the recipient’s bank records yet another entry. At no point does a “thing” move. What moves is belief --- belief that the next person in the chain will honour what the ledger says.1

This is not a metaphor. The English word “credit” descends directly from the Latin credere, meaning “to believe” --- the same root that gives us “creed,” “credence,” and “incredible.”2 When you extend someone credit, you are literally placing your belief in them. When a bank extends credit to a business, it is believing that the business will repay. When a central bank backs a currency, it is asking the entire population to believe that slips of printed paper (or digits on a screen) will be accepted in exchange for real goods tomorrow.

The result is a chain of credere --- a chain of belief --- that stretches from individual depositors through commercial banks, through interbank markets, through central banks, through sovereign states, and back down to the citizens who accept the currency. Each link in this chain trusts the next. The system works not because any single link is unbreakable, but because all the links hold simultaneously.3

When any link snaps, the consequences cascade. The 2008 financial crisis demonstrated this with brutal clarity: banks stopped believing each other, the interbank lending market froze, and the entire global financial system came within days of collapse --- not because the money had disappeared, but because the credere had.4

In plain terms

Credit and trust is the idea that the financial system works like a human chain across a river. Each person holds the hand of the next. The chain can carry enormous weight --- but if one person lets go, everyone downstream falls.

At a glance

How does it work?

The etymology as blueprint

The Latin verb credere means “to believe, to trust, to entrust.”2 It produced a family of English words that map directly onto the mechanics of finance:

  • Credit --- belief extended to a borrower (“I believe you will repay”)
  • Creditor --- the one who believes
  • Credibility --- the quality of being believable
  • Creed --- a statement of belief
  • Incredible --- beyond belief

This is not a coincidence. The Romans understood something modern finance often obscures: lending is an act of faith. The entire vocabulary of finance is, at its root, the vocabulary of belief.2

Think of it like...

If you lend your neighbour your lawnmower, you are extending credit in its most basic form. You believe (credere) that your neighbour will return it. No contract, no interest rate, no collateral --- just trust between two people who know each other. Scale that trust to millions of strangers and you get a banking system.

The credere chain

In a modern economy, trust does not run in a single line. It forms a circular chain where each participant’s belief depends on the belief of others.3

You trust your bank. You deposit your salary because you believe the bank will let you withdraw it. This belief rests on deposit insurance, regulation, and the bank’s reputation.

Your bank trusts its counterparties. Banks lend to each other overnight in the interbank market. Bank A lends to Bank B because it believes Bank B will repay tomorrow. This is the most fragile link in the chain, because banks assess each other’s creditworthiness daily.

Counterparties trust the central bank. If an individual bank runs into trouble, the central bank can act as lender of last resort --- but only if other banks trust that the central bank has the authority and resources to do so.

The central bank trusts the state. A central bank’s credibility ultimately derives from the fiscal and political stability of the sovereign that chartered it. A central bank in a failed state cannot stabilise anything.

The state trusts its citizens. A currency works because citizens accept it in exchange for goods and labour. This acceptance is partly legal (taxes must be paid in the national currency) and partly habitual (everyone around you uses it, so you do too).1

What happens when credere breaks

The 2008 financial crisis is the defining modern example of a credere failure. In the years before the crisis, banks had bundled risky mortgage loans into complex securities (collateralised debt obligations, or CDOs) and sold them to each other, often with the blessing of credit rating agencies that gave them top marks.4

When US housing prices began to fall in 2007, the underlying mortgages started defaulting. But the real crisis was not the defaults themselves --- it was that nobody could tell which banks held how much toxic debt. The securities were so complex and so widely distributed that no bank could assess whether its counterparty was solvent.4

The result: banks stopped lending to each other. The interbank market --- the mechanism through which thousands of banks balance their books every night --- froze. Gillian Tett, in Fool’s Gold, describes the atmosphere at JPMorgan in September 2008: seasoned bankers who had spent their careers managing risk were watching the system they had built come apart, not because of a shortage of money, but because of a shortage of belief.4

Think of it like...

Imagine a dinner party where everyone has brought a covered dish, but a rumour spreads that one of the dishes is poisoned. Nobody knows which one. The rational response is for everyone to stop eating. That is what happened in 2008: the “food” (money) was still there, but the trust that it was safe had evaporated.

Trust is rebuilt slowly

After the 2008 freeze, governments and central banks intervened with extraordinary measures --- bailouts, guarantees, quantitative easing --- not primarily to inject money, but to inject credere back into the system.5 The US Federal Reserve’s decision to guarantee money market funds, the UK government’s bank recapitalisation programme, and the European Central Bank’s pledge to do “whatever it takes” were all, at their core, statements of belief designed to restart belief in others.

This asymmetry is critical: trust can collapse in days but takes years to rebuild. The interbank market did not return to pre-crisis norms for nearly a decade. New regulations (Basel III, Dodd-Frank) were essentially attempts to engineer more durable credere by forcing banks to hold more reserves and disclose more about their exposures.5

Concept to explore

See institutions-as-rules for how formal rules and regulations serve as scaffolding for trust when informal belief alone is not enough.

Why do we use it?

Key reasons

1. It explains why financial crises happen. Most crises are not caused by a shortage of money or resources. They are caused by a collapse in the chain of belief that holds the system together. Understanding credere turns crises from mysterious catastrophes into legible failures of trust.4 2. It reveals what money actually is. Money is not a thing with intrinsic value. It is a token of belief --- a marker that says “someone in this chain believes this is worth something.” Understanding credit-and-trust clarifies why currencies can collapse even when the physical economy is intact.1 3. It connects finance to everything else. The credere chain does not stop at banks. It extends into contracts, property rights, democratic institutions, and social norms. Understanding trust as the substrate of finance connects economics to political science, sociology, and history.3

When do we use it?

  • When analysing a financial crisis and trying to understand what actually broke
  • When evaluating the stability of a financial institution or monetary system
  • When thinking about new financial technologies (cryptocurrency, stablecoins, DeFi) and asking what they use as a trust substrate
  • When studying economic history and noticing that every monetary collapse is, at its core, a trust collapse
  • When considering why some economies develop and others stagnate --- the quality of the credere chain is often the difference

Rule of thumb

Whenever someone tells you a financial system is “backed by” something, ask: backed by whose belief, in whom, enforced by what? That question will reveal the credere chain underneath.

How can I think about it?

The relay race

A financial system is like a relay race. Each runner (bank, institution, depositor) carries a baton (credit) and must hand it cleanly to the next runner. The race works because each runner trusts that the next will be there, ready, and able to receive the baton. If one runner stumbles or disappears, the baton drops and the race stops --- not just for that runner, but for everyone behind them. The 2008 crisis was the moment a runner dropped the baton in the middle of the track and every runner behind them piled up.

The language analogy

Trust in a financial system works like trust in a language. When you speak English, you trust that the person listening assigns roughly the same meaning to your words. You do not verify this for every sentence --- you just assume it. Money works the same way: you hand someone a banknote and trust they will treat it as valuable, just as you trust they will understand the word “bread.” If a critical mass of people suddenly stopped understanding English, communication would collapse overnight. If a critical mass of people stopped believing in a currency, the economy would collapse just as fast --- and for the same structural reason.

Concepts to explore next

ConceptWhat it coversStatus
money-as-social-technologyMoney as transferable credit backed by trust, not a commodity with intrinsic valuecomplete
debt-before-coinageHow mutual obligation and running tabs predated coins by millenniacomplete
institutions-as-rulesThe formal and informal rules that scaffold trust at civilisation scalecomplete
embeddednessPolanyi’s insight that markets are embedded in social relationshipscomplete

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Where this concept fits

Where this concept fits 

graph TD
    E[Economics] --> CT[Credit and Trust]
    E --> MST[Money as Social Technology]
    E --> DBC[Debt Before Coinage]
    E --> IR[Institutions as Rules]
    E --> EMB[Embeddedness]
    CT --> MST
    CT --> DBC
    style CT fill:#4a9ede,color:#fff

Related concepts:

  • money-as-social-technology --- money is the portable form of credit; understanding trust explains why money works
  • debt-before-coinage --- credit (running tabs of mutual obligation) predated coins; trust was the original currency
  • institutions-as-rules --- formal institutions exist partly to scaffold trust where informal belief is insufficient
  • embeddedness --- trust is embedded in social relationships, not floating in an abstract market

Sources

Further reading

Resources

  • Fool’s Gold --- Tett’s narrative account of how JPMorgan invented credit derivatives and how the credere chain snapped in 2008
  • Money: The Unauthorised Biography --- Martin’s argument that money has always been a social technology of transferable credit, not a commodity
  • Debt: The First 5,000 Years --- Graeber’s anthropological history of credit and obligation, showing that debt predated money by millennia
  • The Use of Knowledge in Society --- Hayek’s 13-page essay on how distributed knowledge is coordinated through prices; free at econlib.org
  • The Great Transformation --- Polanyi’s foundational argument that markets are embedded in social relationships, not the other way around

Footnotes

  1. Martin, F. (2013). Money: The Unauthorised Biography. London: The Bodley Head. Chapters 1—3 on money as a social technology of transferable credit. ↩ ↩2 ↩3

  2. Oxford English Dictionary. “Credit, n.” From Latin creditum, past participle of credere (“to believe, to trust, to entrust”). The financial sense (“trust given or received”) is attested from the 1540s. ↩ ↩2 ↩3

  3. Harari, Y. N. (2014). Sapiens: A Brief History of Humankind. London: Harvill Secker. Chapter 10 (“The Scent of Money”) on money as an intersubjective reality sustained by collective belief. ↩ ↩2 ↩3

  4. Tett, G. (2009). Fool’s Gold: How Unrestrained Greed Corrupted a Dream, Shattered Global Markets and Unleashed a Catastrophe. London: Little, Brown. ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  5. Bernanke, B. (2015). The Courage to Act: A Memoir of a Crisis and its Aftermath. New York: W. W. Norton. On the Federal Reserve’s crisis interventions as trust-restoration mechanisms. ↩ ↩2

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