Stablecoins in plain English
A stablecoin is a digital token designed to maintain a relatively stable price against a reference asset. Most widely used stablecoins target one U.S. dollar per token, although a token can reference another currency, commodity, or basket of assets.
“Stable” describes the design goal, not a guarantee. A token can trade above or below its target, redemption can be delayed, reserves can lose value, and an issuer or protocol can fail. The important question is not simply whether a token has held $1 in the past, but why it should remain redeemable near $1 under stress.
Stablecoins are used for trading, cross-border settlement, decentralized finance, and moving value between exchanges or blockchain applications without converting to a bank balance after every transaction. They remain digital assets rather than insured bank deposits.
How a dollar stablecoin holds its peg
An issuer-backed stablecoin usually works through issuance and redemption. An eligible customer sends dollars or approved assets to the issuer, which creates tokens. When that customer redeems tokens, the issuer destroys them and returns the contractual redemption value, subject to its rules.
If a redeemable token trades at $0.99, an arbitrageur may buy it and redeem near $1. If it trades at $1.01, an eligible participant may create new tokens at $1 and sell them. That mechanism can pull the market price toward the target, but only when redemption is available, reserves are credible, banking rails work, and transaction costs do not erase the price difference.
Retail holders do not always have direct issuer redemption. They may depend on an exchange or dealer, face minimum amounts, complete identity verification, or pay fees. A quoted market price is therefore not the same thing as an unconditional claim on one dollar.
The main stablecoin designs
Fiat-reserve stablecoins
These tokens are issued against cash, bank deposits, Treasury bills, repurchase agreements, or other reserve assets held through custodians. The central questions are the quality, liquidity, segregation, and transparency of the reserves, plus the holder's legal redemption rights.
A reserve report is not automatically a financial-statement audit. Read what was examined, the measurement date, the accounting basis, the auditor's scope, and whether liabilities and related-party exposures are included.
Crypto-collateralized stablecoins
Some protocols let users lock volatile digital assets in smart contracts and borrow a stablecoin against them. Positions are normally overcollateralized and can be liquidated if collateral value falls. This design reduces dependence on one deposit-taking issuer but adds oracle, smart-contract, governance, congestion, and liquidation risk.
Algorithmic or undercollateralized designs
An algorithmic stablecoin may use incentives, a paired token, supply changes, or expected future demand instead of fully liquid reserves. These systems can enter a feedback loop: declining confidence weakens the support mechanism, redemptions accelerate, and the paired asset also falls. A mathematical rule does not create external value by itself.
The labels are not always clean. A product can combine reserve assets, on-chain collateral, centralized controls, and algorithmic components.
What “backed one-to-one” should mean
For every token outstanding, an issuer may claim to hold assets with at least the same face value. That statement is only a starting point. Check:
- whether reserves are cash-like or exposed to credit, duration, or liquidity risk;
- where assets are custodied and whether they are legally segregated;
- how often reserve and token-supply figures are published;
- who can redeem directly and on what timetable;
- whether fees, minimums, freezes, or geographic limits apply;
- what happens to holders in an issuer or custodian insolvency; and
- whether the issuer can lend, pledge, or reuse reserve assets.
Market value also matters. A long-dated bond with a $1 face amount can trade below $1 when rates rise. Liquid reserves help an issuer meet large redemptions without selling assets at a loss.
Depegging and the risks behind it
A depeg occurs when the market price moves materially away from the reference value. A brief exchange imbalance is different from a fundamental loss of redeemability, but both deserve investigation.
Common causes include doubts about reserves, failure of a banking partner, frozen assets, a smart-contract exploit, an oracle error, blockchain congestion, insufficient market liquidity, regulatory action, or collapse of an algorithmic support token.
Stablecoin risk is layered:
- issuer risk — the company cannot or will not honor redemption;
- reserve risk — backing assets lose value or cannot be sold quickly;
- custodian risk — a bank, trust company, or other holder fails;
- legal risk — the holder's claim is limited or uncertain;
- technology risk — a contract, bridge, wallet, or network fails;
- market risk — liquidity disappears and the trading price breaks; and
- control risk — an administrator can freeze, blacklist, mint, or upgrade.
A token can work correctly on its original network and still fail when represented by a third-party bridge on another chain. Confirm the contract address, network, and issuer-recognized form.
U.S. regulation and the GENIUS Act
The GENIUS Act became Public Law 119-27 on July 18, 2025. It established a federal framework for permitted payment stablecoin issuers, including reserve, redemption, disclosure, supervisory, and anti-money-laundering requirements. The law's detailed application depends on its definitions, effective dates, implementing rules, and the issuer's status.
Do not conclude that every dollar-linked token is federally approved or covered by the framework. “Payment stablecoin,” “permitted issuer,” and other terms have legal definitions. A token marketed online may be issued abroad, fall outside a category, or fail to comply.
The law does not turn a stablecoin balance into an FDIC-insured bank account. Deposit insurance generally protects eligible deposits at insured institutions within statutory rules; it does not insure a token merely because reserve assets may sit at a bank.
Taxes and recordkeeping
For U.S. federal tax purposes, the IRS treats digital assets as property, not currency, and specifically includes stablecoins. Using a stablecoin to buy another token, pay for goods, or redeem can be a disposition even when the token remained close to $1.
A small economic gain or loss can still require records. Preserve acquisition date, units, dollar basis, transaction identifier, fees, proceeds, and the wallet or exchange involved. Broker reporting does not replace the taxpayer's duty to report taxable transactions.
IRS broker-reporting rules provide optional aggregate methods for certain qualifying stablecoin sales and include specific thresholds and definitions. Those reporting mechanics do not make an unreported disposition tax-free.
Stablecoin yield is a separate product
Holding a token is different from lending it, depositing it into an interest account, or supplying it to a DeFi protocol. A quoted yield may come from borrower interest, trading fees, token incentives, leverage, or maturity transformation.
The SEC's investor bulletin warns that crypto interest-bearing accounts are not equivalent to bank deposits. Before chasing yield, identify who receives the tokens, whether assets can be rehypothecated, what collateral backs loans, how withdrawals work during stress, and which protections actually apply.
Yield adds counterparty or protocol risk on top of the stablecoin's own issuer, reserve, and depeg risks.
How to evaluate a stablecoin
Use a repeatable checklist:
- verify the issuer and authentic contract address through official channels;
- read the redemption terms rather than relying on an exchange description;
- inspect the latest reserve composition and independent assurance report;
- compare circulating supply with reported reserves;
- identify custodians, governing jurisdiction, and insolvency treatment;
- review freeze, blacklist, mint, pause, and upgrade powers;
- confirm whether your wallet, exchange, and blockchain support the exact token;
- examine trading depth during earlier market stress; and
- keep only an amount proportionate to the combined risks.
For a transfer, send a small test amount first. Blockchain transactions can be irreversible, and the same ticker can appear on multiple networks or on counterfeit contracts.
Stablecoin versus dollars in a bank
A bank deposit is a liability of a regulated bank and may qualify for deposit insurance within applicable limits. A stablecoin is a digital asset governed by an issuer's terms or a protocol. Its advantages can include continuous blockchain transfer and application interoperability; its disadvantages include key management, smart-contract exposure, depeg risk, and uncertain recovery paths.
Stablecoins can be useful settlement instruments, but convenience does not eliminate due diligence. Treat the peg as a mechanism to analyze, not a promise embedded in the name.