fxSAVE, issued by the f(x) Protocol smart contracts under the governance of vote-escrowed FXN (veFXN) tokenholders, is a tokenized yield-bearing stablecoin vault that automatically compounds Stability Pool rewards into the decentralized stablecoin fxUSD and USD Coin (USDC) [S1][S2].

Holders gain economic exposure to the f(x) Protocol Stability Pool, which earns wstETH and WBTC rewards from xPOSITION fees, reserve yield, and Aave yields [S1]. fxSAVE is an ERC-4626 vault that auto-compounds those wstETH and WBTC rewards into more fxUSD and USDC, so token value accrues as yields accumulate [S1]. Protocol revenue derives from collateral yield, minting and redemption fees, position fees, and rebalancing and liquidation fees [S2].

f(x) Protocol is a decentralized autonomous organization and has no legal entity, so the token is not issued by any single corporate entity and no jurisdiction of formation exists [S3]. No regulator or license is claimed, and the protocol acknowledges regulators may view it as an unregistered exchange [S3]. The holder's claim is a decentralized, crypto-collateralized position backed by overcollateralized wstETH and WBTC held in smart contracts, with no corporate custodian [S4][S5]. Users must be at least 18, and the United States, Canada, Mainland China, and OFAC, UN, or EU sanctioned jurisdictions are excluded [S3]. Redemption from the pool requires a cooldown period before fxUSD and USDC are returned [S1].

All f(x) tokens are ERC-20, natively issued on Ethereum, with cross-chain availability on Arbitrum, BSC, Optimism, and Polygon via LayerZero bridging [S6]. fxUSD mints onchain when leveraged positions open and is maintained near the U.S. dollar (USD) peg through automatic USDC swaps executed at Chainlink oracle prices, with settlement atomic except for the pool redeem cooldown [S1][S7].

<Sources
  retrievedAt="2026-06-21"
  items={[
    { id: "S1", url: "https://docs.aladdin.club/f-x-protocol/stability-pool" },
    { id: "S2", url: "https://docs.aladdin.club/f-x-protocol-new/f-x-2.0/fees-and-revenue" },
    { id: "S3", url: "https://fx.aladdin.club/terms-of-use" },
    { id: "S4", url: "https://fx.aladdin.club/" },
    { id: "S5", url: "https://docs.aladdin.club/f-x-protocol/introduction-of-fxusd/fxusd-reserve-and-risk-management" },
    { id: "S6", url: "https://docs.aladdin.club/f-x-protocol/contracts" },
    { id: "S7", url: "https://docs.aladdin.club/f-x-protocol/stability-mode" },
  ]}
/>


Tokenized funds

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f(x) Protocol

f(x) USD Saving (fxSAVE) is a tokenized fund share issued by f(x) Protocol.

The fund is open-ended and invests in crypto assets.

Retail investors can subscribe and redeem in USDC.

fxSAVE has been issued on Ethereum as an ERC-4626 token since April 2025.

f(x) USD SavingfxSAVE

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