Stablecoin Depeg Exposure Calculator
Stablecoins are designed to maintain a 1:1 parity with a reference currency (usually USD), but no stablecoin has a perfect zero-risk peg. During market stress events, stablecoins can trade at a significant discount to their peg, causing immediate losses for holders who sell or use them in DeFi protocols that mark positions to market price. This calculator quantifies your exposure: enter your stablecoin holdings and a hypothetical or observed peg deviation percentage to see your potential loss in USD. Use it to stress-test your DeFi portfolio and set position size limits relative to your risk tolerance.
Depeg exposure formula
Potential Loss = Holdings * (Peg Deviation / 100)
Market Value at Depeg = Holdings * (1 - Peg Deviation / 100)
Example: $50,000 holdings with a 5% depeg. Loss = $50,000 * 0.05 = $2,500. Market value = $50,000 * 0.95 = $47,500. This is the value you would receive if forced to sell at the depegged price.
Stablecoin risk categories
- Fiat-backed (USDC, USDT, BUSD): backed by cash and short-term treasury securities held at regulated custodians. Risk comes from custodian failure, reserve shortfalls, or regulatory action. Generally lowest depeg risk among major stablecoins.
- Crypto-backed over-collateralized (DAI, crvUSD): backed by on-chain collateral exceeding the stablecoin value. Risk comes from rapid collateral price drops exceeding the buffer, or governance failures. Moderate depeg risk.
- Algorithmic (historical examples: UST): maintained by code-based mechanisms without direct backing. Can enter death spirals if redemption pressure exceeds the mechanism's capacity. Highest depeg risk; many have failed historically.
Stablecoin depeg risk: frequently asked questions
What is a stablecoin depeg?
A depeg occurs when a stablecoin's market price deviates significantly from its intended $1.00 parity. For example, if USDC trades at $0.97, it has depegged by 3%. Depegs can be temporary (caused by panic selling) or permanent (caused by protocol failure or insufficient reserves).
How is depeg exposure calculated?
Depeg Exposure (USD) = Holdings * (Peg Deviation % / 100). For example, $50,000 of a stablecoin that depegs 5% results in $2,500 of exposure (unrealized loss if sold at the depegged price).
What caused notable stablecoin depegs?
Terra/LUNA UST collapsed to near zero in May 2022 due to its algorithmic design failing under redemption pressure. USDC briefly depegged to $0.87 in March 2023 when Silicon Valley Bank (a custodian of USDC reserves) failed, before recovering after regulatory intervention confirmed reserve safety.
Are all stablecoins equally at risk of depegging?
No. Fiat-backed stablecoins (USDC, USDT) backed by regulated custodians carry lower depeg risk than algorithmic or partially collateralized stablecoins. Over-collateralized crypto-backed stablecoins (DAI) fall in between. Each design has different failure modes and risk profiles.
How can I reduce stablecoin depeg risk?
Diversify across multiple stablecoins with different backing mechanisms. Monitor reserve attestations and audits. Maintain only working capital in any single stablecoin and convert to fiat or blue-chip assets for longer-term savings. Set position size limits per stablecoin.
Official sources
- Ethereum Foundation: Stablecoins explained.
- Ethereum Foundation: Decentralized Finance (DeFi).
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.