DAI Peg Stability
As a Crypto-Collateralized stablecoin, DAI is designed to maintain a $1.00 peg at all times. Peg stability is the most critical metric for any stablecoin — a persistent de-peg can trigger a loss of confidence, mass redemptions, and cascading liquidations in DeFi protocols that depend on the token.
How DAI Maintains Its Peg
DAI is minted through Maker Vaults (previously Collateralized Debt Positions). Users lock collateral (ETH, WBTC, stETH, etc.) into a Maker Vault smart contract and mint DAI up to a collateralization ratio set by governance (e.g., 150% for ETH means $150 of ETH to mint $100 of DAI). If collateral falls below the liquidation ratio, automated keepers liquidate the vault and sell collateral to repay the DAI debt plus a stability fee (Maker's income). The Peg Stability Module (PSM) allows 1:1 swaps between DAI and USDC with no slippage, anchoring the peg. Since 2023, Maker has deployed billions into US Treasury bills via the RWA vaults, earning yield that funds the DSR (DAI Savings Rate).
Common De-peg Causes
During extreme market volatility, selling pressure on DAI can exceed available buy-side liquidity on exchanges. This causes temporary downward deviations until arbitrageurs step in to buy discounted tokens and redeem for $1 from MakerDAO / Sky Protocol.
Negative news about MakerDAO / Sky Protocol, questions about reserve adequacy, or regulatory actions can cause holders to sell, pushing DAI below $1.00 on secondary markets even if reserves are fully intact.
Failures of other stablecoins (e.g., UST/Luna collapse) or crypto lenders can cause panic selling across all stablecoins, including DAI, as holders flee to fiat. These events typically resolve as DAI's peg mechanism operates.
Monitoring the Peg
Track DAI peg deviations in real-time using the BTC.PH Depeg Monitor. Set alerts for deviations below $0.995 or above $1.005 to react quickly to potential instability.