Peg
Target exchange rate that links one asset's value to a reference.
A peg is a target exchange rate that links an asset's value to another asset, currency, or reference. A stablecoin may target one US dollar, while a wrapped token may aim to equal one unit of the original asset. The market price can move away from the target, so a peg is an objective supported by a mechanism, not a guarantee.
Fiat-backed stablecoins commonly maintain their peg through reserves and redemption. Approved customers can exchange tokens for the referenced currency, encouraging arbitrage when market prices differ. Crypto-backed systems let users mint assets against excess collateral and liquidate unsafe positions. Other designs use algorithms, incentives, or protocol-owned liquidity, each with different assumptions and failure modes.
Wrapped assets use a related model. A custodian or smart contract locks the original asset and issues a representation elsewhere. The peg depends on users believing the wrapped token can be redeemed for the underlying asset. Bridge security, custody, contract controls, network availability, and redemption restrictions therefore matter as much as the current trading price.
Pegs matter because lending, payments, trading pairs, and treasury strategies often treat the asset as stable. A small deviation can trigger liquidations or losses when positions are leveraged. If a stablecoin trades at $0.98, a holder who must sell immediately realizes a two percent loss before fees. A severe depeg can spread through protocols that use the asset as collateral.
Common warning signs include declining reserve quality, unclear liabilities, concentrated collateral, delayed redemptions, shallow liquidity, large holder exits, and dependence on one oracle or market maker. A high yield may compensate for hidden peg risk rather than provide a free return. Published attestations can show assets at a point in time but may not establish full liabilities, access, or continuous solvency.
Before relying on a pegged asset, understand who can mint, freeze, upgrade, redeem, and hold reserves. Compare prices across venues and test whether redemption is practically available to the user. Diversification can reduce exposure but cannot eliminate shared banking or bridge dependencies. A strong peg combines credible backing, liquid markets, reliable redemption, transparent controls, and confidence during stress, not merely a familiar price display.
Frequently asked questions
- A peg may rely on direct redemption for reserves, overcollateralized borrowing, market-maker liquidity, arbitrage incentives, or active monetary policy. When the market price differs from the redemption value, traders may profit by buying or creating the cheaper side and redeeming or selling the other. The mechanism works only when access, collateral, liquidity, and confidence remain credible.
- Depegs can result from doubtful reserves, collateral losses, redemption delays, bank or custodian problems, bridge exploits, thin liquidity, rapid selling, flawed incentives, or loss of confidence. Temporary exchange imbalance differs from permanent design failure. Check several markets and the actual redemption path because one pool's price may be distorted without representing the asset's broader value.
- Compare prices across deep independent venues, not only a portfolio app or one liquidity pool. Review the target value, issuer's redemption terms, fees, eligibility limits, reserve composition, attestations, collateral ratio, oracle design, and historical depegs. For bridged assets, verify the custodian and bridge contracts. A price near target today does not prove future redeemability.