A collateralized stablecoin is a stablecoin that keeps a steady price by holding assets of at least equal value behind every token. The backing may be fiat money and short-term government debt, other cryptocurrencies locked in smart contracts, or physical commodities such as gold. Collateral gives holders something real to claim or to fall back on, which is why the large majority of stablecoins by value are collateralized.
The term is mainly used to contrast these coins with an algorithmic stablecoin, which tries to hold its peg through supply rules and a sister token rather than assets. The collapse of TerraUSD in May 2022, an algorithmic design, pushed both markets and regulators firmly towards collateral. Each collateral type has its own entry: fiat-backed stablecoin and crypto-backed stablecoin.
Collateralized stablecoins in plain terms
A pawn shop ticket is a good comparison. You leave a watch at the counter and get a ticket that lets you collect it, or its value, later. The ticket holds its worth because the watch is in the safe. If the safe held only a promise that a watch might turn up, nobody would pay full price for the ticket.
A collateralized stablecoin works the same way. Each coin is a ticket, and the collateral is what sits in the safe. The questions that matter are what is in the safe, whether there is enough of it, who checks, and how fast a ticket holder can actually get paid.
Types of collateral
| Type | Typical backing | Held by | Examples |
|---|---|---|---|
| Fiat-backed | Cash, Treasury bills, repo, money market funds | A regulated issuer and its banks or custodians | USDC, USDT, PYUSD |
| Crypto-backed | Ether, bitcoin and other tokens, usually above 100% of value | Smart contracts on a blockchain | DAI and its successor USDS |
| Commodity-backed | Allocated gold or other metals in vaults | An issuer and a vault custodian | Tether Gold (XAUT) |
Fiat-backed coins such as USDC and Tether (USDT) hold stablecoin reserves off-chain. Crypto-backed coins such as Dai hold their collateral on-chain and use overcollateralization to absorb price swings. Tether Gold is a commodity-backed example in which each token represents a set weight of gold. Some newer designs, such as the synthetic dollar issued by Ethena, hold crypto collateral alongside offsetting derivative positions, a hybrid that does not fit neatly into any of these groups.
How collateral holds the peg
Collateral supports the price through two channels. The first is redemption. If an authorised holder can hand back a token and receive $1 from the issuer, then whenever the market price falls to $0.99 traders buy cheap tokens and redeem them, which removes supply and pushes the price back up. When the price rises above $1, they deposit dollars, have new tokens minted and sell them. This arbitrage loop runs through minting and burning.
The second channel is confidence about loss. Even holders who will never redeem directly value the coin on the belief that the backing would cover them in a wind-down. For crypto-backed coins there is no issuer to redeem from in the usual sense; instead, positions whose collateral value falls too far are liquidated automatically, and the proceeds retire the stablecoins that were borrowed against them.
Regulation
Rules now generally require full collateral of high quality for any coin used for payments. In the United States, the GENIUS Act of July 2025 defines a payment stablecoin as one the issuer must redeem for a fixed amount of money, requires one-for-one reserves in a short list of liquid assets, and limits issuance to permitted issuers. In the European Union, MiCA classes single-currency coins as e-money tokens and baskets as asset-referenced tokens, each with reserve and redemption rules. Hong Kong and Singapore have their own fiat-backed regimes. Crypto-collateralized coins with no central issuer sit awkwardly in these laws, which are built around an identifiable issuer holding reserves.
Risks and limits
- Collateral quality. A coin is only as good as its backing. Long-dated bonds, loans or volatile tokens can lose value at the worst moment.
- Custody and bank risk. Off-chain reserves sit with banks and custodians that can fail, while on-chain collateral depends on smart contracts and oracles that can be attacked.
- Access to redemption. Many issuers redeem only for verified institutional clients and above a minimum size, so retail holders rely on exchanges and market makers, and prices can drift below the peg; see depegging.
- Run dynamics. When doubts arise, early redeemers are paid first, creating pressure similar to a bank run.
- Centralised control. Fiat-backed coins can be frozen by their issuers, a feature regulators require but critics see as a weakness; see stablecoin freezing.
Collateral also explains how issuers earn money: interest on reserves funds most fiat-backed issuers, while crypto-backed systems charge borrowers a stability fee. The broader landscape of coins is listed in the list of stablecoins, and the distinction from state money is covered in CBDCs and stablecoins.