A stable price
needs a mechanism.

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What is a stablecoin?

A stablecoin is a token designed to track a reference value, commonly one US dollar or one euro. People can transfer it on a blockchain or use it inside applications. Its stability comes from an arrangement around the token: reserves, collateral, market incentives, or a combination.

Four questions make the arrangement easier to understand: stable against what, backed by what, redeemable for what, and controlled by whom? The same ticker on two networks can involve different transfer systems. A separate product promising yield adds another question: who pays that yield?

Stable against which unit?

A peg is a target exchange rate, not a guarantee. A dollar stablecoin targets a dollar, so its value in euros or Australian dollars still changes with exchange rates. It also inherits changes in the dollar’s purchasing power. A euro token such as Circle’s EURC answers a different question: how many euros does one token represent?

Gold-backed tokens need a separate label. Paxos describes one PAXG as representing one fine troy ounce of allocated gold. That quantity of gold can become worth more or fewer dollars. Calling it stable without naming the reference hides the difference between keeping a fixed quantity of gold and keeping a fixed dollar value.

Minting, redeeming and selling are different actions

Minting creates or issues tokens into circulation. Redemption returns tokens through the arrangement that supports them and reduces the circulating obligation. In Circle Mint, institutional customers can convert dollars to USDC and USDC back to dollars. The five-step flow illustrates that issuer-backed route; collateral borrowing and synthetic designs use different backing and settlement steps.

Buying on an exchange usually transfers existing tokens from a seller. Selling to another trader usually leaves the total supply unchanged. Neither action necessarily touches the issuer’s bank reserves. Direct redemption can have eligibility checks, minimum amounts, fees and processing delays. A holder can therefore have ready access to a market while lacking a direct issuer account. “Redeemable” always needs an answer to “by whom, into what, and under which conditions?”

Why arbitrage can pull a price toward the peg

Consider fictional tokens redeemable for $1 each by an eligible participant. At a market price of $0.97, buying 100 costs $97. Redeeming for $100 leaves a $3 gross difference before fees, funding costs and settlement risk. Buying absorbs offered tokens; redemption removes supply. At $1.03, a participant able to mint 100 for $100 could sell for $103, adding supply to the market.

These are illustrative incentives, not assured profits or instructions to trade. If total costs exceed $3, the example has no profit. If redemption stops, the intended $100 payment may never arrive. Arbitrage can become constrained precisely when confidence weakens. Ethena’s USDe documentation, for example, limits direct minting and redemption to authorized participants; everyone else depends on available market routes.

What a synthetic dollar hedge is trying to do

A short derivative gains when its reference asset falls and loses when it rises. In a deliberately simplified model, a portfolio owns $100 of a volatile asset and an equal short exposure. If the asset falls to $80, the asset loses $20 while the short gains $20. The combined value remains $100 before costs. The hedge reduces directional price exposure; it does not turn the positions into bank deposits.

Actual results depend on pricing differences, funding payments, collateral management and whether counterparties settle. Funding can become a cost. Ethena’s current documentation describes USDe backing as a changing portfolio that also includes other strategies and stable assets, so the simple hedge is an explanation of one mechanism, not its complete current balance sheet.

A token is not its blockchain

USDC is a token issued on several supported networks, including Ethereum and Solana; USDC itself is not a blockchain. The network records transfers, while the issuer arrangement supports the token’s target. Network fees and confirmation rules belong to that network. A token’s name or logo does not establish which contract or mint created it.

Issuer-native means the issuer recognizes that deployment. A third-party bridged version can instead represent tokens locked elsewhere, with a bridge responsible for releasing them. This adds a dependency on the bridge’s custody or verification system. Circle’s CCTP uses an issuer-supported burn-and-mint route: destroy native tokens on one supported chain and mint on another after the required verification. That differs from keeping a bridge wrapper in circulation. Both routes still have operational assumptions; destination support and the exact token version matter.

A depeg can have more than one cause

A price below target may reflect thin trading liquidity, delayed redemption, doubts about reserves, or an actual loss of backing. Those are different problems. A solvent arrangement can struggle to pay immediately if its assets or payment rails are unavailable. An insolvent arrangement has insufficient recoverable assets to meet its obligations. A market price alone does not prove which condition exists.

Control is another layer. Circle’s non-EEA USDC terms describe address blocking and restrictions; Tether’s terms also provide for freezing. Holding your own wallet key does not override those powers. Crypto-collateralized designs add oracle and liquidation dependencies. Synthetic designs add hedging venues and custodians. A protocol’s lack of issuer freezing does not remove contract bugs or collateral losses. Finally, placing any stablecoin in a bridge, exchange or lending application adds that service’s risks to the token’s existing ones.

Where does stablecoin yield come from?

A stable unit of account does not generate income by itself. Payments can come from interest on reserve assets, borrowers paying interest, derivative funding, or a treasury distributing incentives. Each source has a payer and conditions. Reserve income may belong to the issuer: Circle’s USDC terms do not give ordinary holders interest simply for holding USDC.

A separate receipt token can represent participation in a reward arrangement. Ethena’s sUSDe is received when USDe enters its rewards vault; discretionary distributions can increase the USDe represented by each receipt. That is distinct from merely holding USDe, and the product’s use of “staking” does not mean the holder is validating a proof-of-stake blockchain. A quoted yield can change or stop. More units of a token also do not ensure more dollars if the token loses its peg.