What are stablecoins?
Lesson 12 · practical guide
Stablecoins aim to track a reference value such as the dollar or euro. Their stability depends on reserves, redemption, collateral, technology, issuer and liquidity. The name does not make the asset risk-free.
What you will learn
Understand why stablecoins aim for a reference value and how the peg can fail.
Key terms
- Peg — the target relationship, such as one token for one US dollar.
- Reserve — assets or collateral intended to support redemptions.
- Depeg — a material move away from the reference value.
Follow these steps
- Identify the issuer, redemption process, reserve assets and publication frequency.
- Ask who can freeze, mint or redeem tokens and under which legal terms.
- Check liquidity on the venues you would use during stress, not only on a normal day.
- Treat a stablecoin as a separate credit, operational and regulatory risk.
Practical advice
Stable value is a design goal, not a promise that risk disappears. A token can trade below its target when reserves, redemptions, liquidity or confidence are questioned.
Long-form explainer
The full guide
Read this lesson as a chapter: understand the mechanism, test the assumptions and apply the idea with a clear risk limit.
A stablecoin is an arrangement around a reference value
A stablecoin aims to keep a token near a reference such as one US dollar. The mechanism may rely on reserves held by an issuer, overcollateralised crypto assets, an algorithm or a combination of incentives. “Stable” describes an objective, not a guarantee. The peg can move when redemption, collateral, governance or liquidity fails.
The useful question is how a holder gets back the reference asset. Read who may redeem, what collateral exists, where it is held, how frequently it is disclosed and what happens during stress. A reserve statement, if provided, is not automatically the same as a real-time guarantee of liquidity.
Treat the peg as a risk to be tested
Check the difference between the token's market price and its reference across more than one venue. A temporary small deviation can be a market-making issue; a persistent or widening deviation demands a deeper review. Also examine chain risk, smart-contract permissions, freeze functions and dependence on banks or custodians.
Stablecoins can be useful for settlement or liquidity, but they can concentrate operational and counterparty exposure. Do not use a stablecoin balance as a substitute for an emergency fund without understanding the legal and practical route to cash.
What usually goes wrong
The central mistake is treating a stablecoin as cash. A stable price is a design goal maintained by reserves, redemption rights and market confidence, not a property of the token itself. When any of those weaken, the price can trade below its target, and the moment you most want to exit is the moment the exit is most crowded. The second error is not distinguishing between types. A token backed by short-term government debt, one backed by other crypto assets and one that relies on an algorithm have almost nothing in common except the word on the label.
People also assume that an attestation is an audit. A monthly report signed by an accounting firm confirming balances at a point in time is useful, but it is not continuous assurance and it says little about what happens under stress. The final mistake is ignoring who can freeze or blacklist an address. Many stablecoins include that permission deliberately, for legal reasons, and it works exactly as designed. Knowing it exists before you hold a large balance is better than discovering it during an incident involving someone you transacted with.
How it works
Some stablecoins use cash or short-term assets, some use crypto collateral and others use algorithms or incentives. Ask what can be redeemed, by whom, under which terms and how reserves are reported.
Even a widely used token can trade away from its target during stress. Frozen addresses, bank access, oracle errors, contract bugs or a congested network can affect redemption and transfers.
Worked example
Numbers make an idea concrete. Here is a small, illustrative one — not a forecast.
A stablecoin intended to equal €1 trading at €0.96 represents a 4% deviation. €1,000 of it is worth about €960 at that market price before fees.
Before you act
Run through these questions before you commit any money or make a decision based on this lesson:
- What backs the token?
- Who can redeem it and under what terms?
- Can administrators freeze or change supply?
- Where is exit liquidity during stress?
Practice this lesson
Reading is a start; doing the exercise is what makes the idea stick.
Compare two stablecoins by issuer, reserve, redemption, chain, fees, transparency and failure scenario. Identify the risk you understand least.
Further reading
Educational content only: This guide is not personal financial, legal or tax advice. Markets involve risk, including the possible loss of capital. Verify current rules, fees and product availability in your country.