sfrxUSD (Staked Frax USD) is a yield-bearing stablecoin issued by Frax Finance, representing a staked version of frxUSD, a stablecoin pegged to the USD. frxUSD is fully backed by US dollars deposited at custodians, while the sfrxUSD generates yield through the Frax ecosystem’s yield strategies, including the RWA yield sources, carry trades, market and DeFi operations. It aims to provide auto-compounding returns.