Frax Finance is an on-chain project and ecosystem of assets and protocols, not the name of one stablecoin. Its current documentation distinguishes FRAX, the native gas asset of Fraxtal, from frxUSD, a separate U.S.-dollar stablecoin. Older pages may use “FRAX” for the project’s earlier stablecoin design, so the asset name and the date of a source matter.
Names that are easy to confuse
Frax’s documentation says the Ethereum ERC-20 token formerly called FXS can be upgraded one-to-one to native FRAX on Fraxtal, a process introduced in April 2025. WFRAX is a wrapped representation used in the project’s cross-chain system. These names describe related but distinct tokens and routes.
frxUSD is a separate dollar-denominated asset. Frax’s current documentation describes it as fully collateralized by permitted cash-equivalent reserves, including tokenized Treasury funds, with issuer and custody roles delegated under DAO governance. It should not be conflated with either FRAX or the earlier fractional-algorithmic stablecoin design.
Parts of the ecosystem
Frax operates several distinct products. Fraxtal is its blockchain, where FRAX serves as the native gas token. Frax Ether uses frxETH and sfrxETH for different parts of an ETH staking design: frxETH is loosely pegged to ETH, while sfrxETH is the vault token that accrues staking rewards. Fraxlend creates isolated lending markets between asset pairs, and Fraxswap is an automated market maker with time-weighted order functionality. Each component has its own contracts, risks, and documentation.
How to read older references
The project began with a fractional-algorithmic stablecoin called FRAX, while FXS served a different token role. Later migrations changed those names and functions. When a source discusses collateral ratios, minted FXS, or the old FRAX peg, treat it as a description of the earlier stablecoin design, not as a current description of the Fraxtal gas asset or frxUSD.
Risks and scope
Frax assets are not interchangeable simply because they share a brand. Bridged representations, staking tokens, stablecoins, and lending positions have different redemption paths and contract risks. Verify the chain, token contract, and current protocol documentation before interacting with an asset.
Related Terms
See Also
- Why Algorithmic Stablecoins Keep Failing
- Real World Asset Tokenization: What It Is and Why BlackRock Is Doing It
- Are Layer 2 Networks Actually Decentralized?
Sources
- FRAX token overview — defines the current Fraxtal gas asset and documents the one-to-one FXS upgrade and WFRAX distinction.
- frxUSD documentation — describes its reserves, redemption structure, custodians, and DAO-delegated issuer responsibilities.
- frxETH and sfrxETH — explains how the two ETH-related assets differ and how staking rewards accrue.
- Fraxlend overview — describes isolated lending markets and the roles of lenders and borrowers.
- Fraxswap overview — explains the project’s time-weighted automated market maker.
- Cross-chain strategy for Frax assets — distinguishes FRAX, WFRAX, legacy FXS, and bridged representations.