FRAX Peg Stability
As a Hybrid stablecoin, FRAX 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 FRAX Maintains Its Peg
FRAX v1 used a fractional reserve model where the collateral ratio (CR) started at 100% USDC and reduced algorithmically as demand grew. When CR was 85%, minting $1 of FRAX required $0.85 USDC + $0.15 worth of FXS (which was burned). When redeeming, $0.85 USDC was returned + $0.15 FXS was minted. Since 2022, Frax has pursued 100% CR through the AMO system, which deploys excess USDC into Curve, Convex, Aave, and other yield-generating protocols. The yield generated by these AMO positions funds the Frax ecosystem and helps defend the peg. Fraxtal L2 and frxETH have added new revenue streams.
Common De-peg Causes
During extreme market volatility, selling pressure on FRAX 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 Frax Finance.
Negative news about Frax Finance, questions about reserve adequacy, or regulatory actions can cause holders to sell, pushing FRAX 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 FRAX, as holders flee to fiat. These events typically resolve as FRAX's peg mechanism operates.
Monitoring the Peg
Track FRAX 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.