In simple terms — A depeg occurs when an asset's price moves away from the reference it is intended to track. A stablecoin designed to be worth one dollar is depegged when it trades meaningfully above or below that value; the deviation alone does not show whether the problem is brief or permanent.
There is no universal threshold for every market and horizon. One anomalous quote on a thin venue differs from inconsistent prices across several markets combined with suspended redemptions. A depeg therefore needs to be described by size, duration, liquidity, and the design of the stablecoin.
How a depeg starts and spreads
The trigger may be financial or technical: doubts about reserves, falling collateral value, custodian failure, blocked redemptions, a smart-contract bug, an unreliable oracle, or network congestion. Selling reduces available liquidity; spreads and price impact rise, and more holders may try to exit first.
Arbitrage tends to reduce the deviation only when purchase, redemption, and transfer remain accessible and participants believe that the reference value can be obtained. When that confidence disappears, the incentive may vanish or fail to compensate for redemption time, cost, and risk.
In DeFi, propagation can run through pools, loans, and collateral. A lower price can reduce position coverage, trigger liquidations, and change pool reserves. If the asset was transferred through a bridge, distinguish the original token from its representation on the destination network.
How to read the event
First compare several venues and separate last price, bid-ask spread, and depth. Then check the primary market, redemption rules, reserve composition, recent attestations, and collateral conditions. Volume alone does not reveal net buying or selling, while an average price can hide very thin order books.
For an on-chain protocol, inspect the oracle, liquidation thresholds, and dependencies on other contracts. Deposits to an exchange or movements by large wallets are flow signals, not automatic proof of an intention to sell.
Repegging and limits
A depeg can close when liquidity and redemption work, but a past recovery does not guarantee a future one. A small deviation can precede a structural failure; a wide deviation can instead reflect temporary disorder in a local market. The diagnosis should remain conditional and state which observations would disprove it.
The decentralized finance map connects depeg, stablecoins, pools, and protocol dependencies.
Sources
- Federal Reserve Bank of New York — Runs and Flights to Safety: Are Stablecoins the New Money Market Funds? — Studies runs, flights towards assets perceived as safer, and differences among stablecoin structures.
- Federal Reserve Board — The stable in stablecoins — Describes issuance, redemption, collateral, stabilisation mechanisms, and run risk.