Stress-testing a stablecoin

Eleven fields that describe a stablecoin — and the three that alone matter under stress.

This lesson has had no expert review. It was written for this platform and against the evidence it cites; nobody has gone through it independently.

Learning objectives

You can describe a stablecoin completely along a fixed frame.
You can formulate a stress scenario whose result is not a price but a redemption question.

Check your prior knowledge

Answer these for yourself before reading on. Wherever you hesitate is where this lesson pays off.

What holds a backed stablecoin's price at its reference value?
Who may demand redemption, and from what amount?
What happens to collateralized positions when the price diverges?

Core concept

Fact

Eleven fields, always the same

Issuer, backing, reserve, redemption, peg mechanism, liquidity, oracle, governance, counterparty, regulatory classification, behavior under stress. A stablecoin not described in all eleven fields has been looked at, not analyzed. The order matches the protocol frame: comparability comes from repetition, not from depth in one place.

Interpretation

Under stress, three of them count

Who may redeem, in what size, how fast? How deep is the secondary market when many want to sell at once? And how do the lending markets treat the price — as a market price, or as fixed at 1? The other eight fields explain how it came about; these three decide what happens. A stress test discussing reserve composition without naming the redemption terms examines the wrong thing thoroughly.

Risk

A discount tests the construction, not the opinion

If the price falls below the reference value, that is first an observation about supply and redemption access. Only when the discount persists although redemption is open does it become a statement about the backing. That order matters: inferring missing backing straight from a discount makes a factual claim about an issuer without holding the evidence for it.

Risk

Contagion runs through the collateral

A stablecoin is rarely held alone; it collateralizes loans. A market-price oracle passes any discount straight to every collateralized position and can trigger simultaneous liquidations whose sales hit the same strained market. An oracle fixed at the reference value avoids that and instead creates loans against collateral worth less than assumed. Both designs trade one risk for another — neither is the cautious one.

Definitions

Depeg in the glossary: A persistent divergence of the market price from the reference value.
Redemption access: Who may redeem with the issuer at the reference value, and on what terms.
Reserve: The assets an issuer backs the issued quantity with.

Model

Name the trigger — discount, announcement, reserve event
Check redemption access — who can arbitrage?
Check secondary depth — who can sell?
Check oracle treatment — is the discount passed through?
State the result: capital affected, not an estimated loss

A stress scenario in five steps — Step 5 is deliberately not a loss figure — that would be a precision the scenario does not support.

Formulas

Arbitrage margin against the redemption hurdle

worthwhile arbitrage amount ≈ minimum redemption amount, provided discount × amount > costs

discount: difference between reference value and market price
costs: transaction, capital and process costs of redeeming

Limit: The calculation holds only for participants with redemption access. For everyone else the discount is not an arbitrage opportunity but simply the price.

Worked example

The same discount, two constructions

Market price: USD 0.978 over two days
Construction A: daily redemption from USD 1, many participants
Construction B: redemption only for vetted partners from USD 100,000
Lending markets' oracle: market price in both cases

In A a two-day 2.2 % discount is a strong signal, because many could have closed it. In B the same discount can arise with nothing missing from the backing — there are simply too few permitted to arbitrage.

Same price, opposite evidential weight.

Reading: Which is why the redemption terms come before the price in a report. Without them the price is a number with no reference.

Retrieval

The reserve composition.The redemption terms — who may redeem, from what amount, how fast.The market capitalization.

That is the more cautious construction.Simultaneous liquidations are avoided; in exchange, loans run against collateral worth less than assumed.The positions are hedged against the discount.

Exercise on real data

Work through the case study and compare your answer on the oracle question with the written-out reasoning.

Case study: stablecoin under stress →

Look at one stablecoin's markets and record which of the eleven fields the data available here fills — it is few, and that is the finding.

Stablecoin markets in the Explorer →

Application

Your institution holds a stablecoin as a liquidity reserve. Formulate the stress scenario you put to the risk committee.

Related case studies

Institutional reading

Bank: Does the holding count as a liquid asset when the institution has no redemption access of its own?
Insurance: Would the discount itself be a loss event, or only redemption failing?
Advisory: Does the client know their “dollar” is a claim with access conditions?

Metrics in this lesson

Key takeaways

Eleven fields describe a stablecoin; three decide under stress.
A discount first measures redemption access, not the backing.
Both oracle constructions trade one risk for another.