---
title: Stake & Unstake frxUSD Overview
lang: en-US
---

# Stake & Unstake frxUSD Overview

Stake frxUSD for sfrxUSD (Frax's savings product) to earn daily interest from tokenized institutional U.S. treasury fund reserves, Superstate's USCC, Ethena's USDe, and Sky's (formerly Maker) sUSDS. [Learn more](/protocol/assets/frxusd/sfrxusd)

## What is sfrxUSD?

**Staked Frax USD (sfrxUSD)** is Frax's yielding stablecoin implemented as an ERC4626 token. When you stake your frxUSD, you receive sfrxUSD tokens that automatically accrue yield over time. sfrxUSD is fully redeemable for frxUSD at an increasing rate proportional to the yield mechanism, with no unstaking fees or price impact.

### Key Features

- **No Lock-up Period**: Stake and unstake at any time
- **No Fees**: Zero staking or unstaking fees
- **Automatic Yield**: Earn yield without manual intervention
- **Cross-Chain Support**: Available on 20+ blockchain networks
- **ERC4626 Standard**: Compatible with DeFi protocols and wallets

## How Yield Works

sfrxUSD uses Frax's **Benchmark Yield Strategy (BYS)** to automatically allocate your staked frxUSD to the highest-yielding venue based on current market conditions:

### Yield Sources

1. **Carry-Trade Strategies**

   - Ethena (USDe)
   - Superstate (USCC)

2. **DeFi AMO Strategies**

   - Aave
   - Curve Finance
   - Convex Finance
   - Compound Finance

3. **Real-World Assets (RWA)**
   - Blackrock Treasury Bills
   - FinresPBC Treasury Bills

The system automatically switches between these strategies to ensure you always earn the highest risk-adjusted yield available in the market.

## Supported Networks

sfrxUSD staking is available on **20+ blockchain networks**, including:

- **Ethereum** (mainnet)
- **Fraxtal** (Frax's L2)
- **Arbitrum, Optimism, Base** (L2s)
- **Polygon, Avalanche, BSC** (L1s)
- **And many more...**

For a complete list of supported networks and contract addresses, see [Supported Networks and EIDs](/frxusd/stake-and-unstake-supported-networks).

## Getting Started

Choose the guide that matches your target network:

### Ethereum Mainnet

- **Lockbox Method**: Uses lockbox contracts
- **Guide**: [Stake & Unstake frxUSD on Ethereum](/frxusd/stake-and-unstake-quickstart-ethereum)

### Fraxtal

- **Native Support**: Direct staking contracts
- **Guide**: [Stake & Unstake frxUSD on Fraxtal](/frxusd/stake-and-unstake-quickstart-fraxtal)

### Other EVM Chains

- **Standard Method**: Works on most EVM chains
- **Guide**: [Stake & Unstake frxUSD on EVM chains](/frxusd/stake-and-unstake-quickstart-evm-chains)

## Next Steps

Ready to start earning yield? Choose your network and follow the appropriate quickstart guide:

- [Supported Networks and EIDs](/frxusd/stake-and-unstake-supported-networks)
- [Stake & Unstake on Ethereum](/frxusd/stake-and-unstake-quickstart-ethereum)
- [Stake & Unstake on EVM Chains](/frxusd/stake-and-unstake-quickstart-evm-chains)
- [Stake & Unstake on Fraxtal](/frxusd/stake-and-unstake-quickstart-fraxtal)