What is Compound Ether (CETH)?

Quick Facts

  • Token name: Compound Ether (cETH)
  • Blockchain: Ethereum (ERC-20)
  • Issuer: Compound Finance protocol
  • Underlying asset: Ether (ETH)
  • Purpose: Receipt token representing ETH supplied to Compound
  • Interest model: Algorithmic, based on supply and demand
  • Governance token: COMP (separate from cETH)

Introduction

Compound Ether (cETH) is the receipt token issued by the Compound Finance protocol when a user deposits ETH into its Ether-based lending pool. It is one of Compound's family of 'cTokens' — ERC-20 tokens that represent a user's share of a specific asset pool within the protocol.

By simply holding cETH, users automatically earn interest on their deposited Ether without any additional steps. The token plays a central role in making decentralized lending and borrowing accessible to anyone with an Ethereum wallet.

History & Background

Compound Finance was founded by Robert Leshner and Geoffrey Hayes in 2018. The protocol launched after raising over $8 million in early venture capital funding, followed by a $25 million Series A led by Andreessen Horowitz.

Compound became one of the most influential DeFi protocols during the 2020 'DeFi Summer,' helping drive the explosive growth of decentralized finance. cETH, backed by the largest lending pool on the platform, was at the heart of that growth.

How Compound Ether Works

When a user supplies ETH to the Compound protocol, they call the mint function on the cEther smart contract. The protocol transfers the ETH into the contract and issues cETH tokens to the supplier's wallet.

Interest is not paid out directly. Instead, each cETH becomes redeemable for an ever-increasing amount of ETH as the exchange rate rises over time. The longer a user holds cETH, the more underlying ETH it represents. When a user wants to exit, they redeem their cETH and receive the original ETH plus accrued interest.

The interest rate is algorithmic — determined by the ratio of supplied ETH to borrowed ETH in the pool. Higher demand from borrowers means higher rates for suppliers.

Tokenomics

cETH has a dynamic supply — new tokens are minted when users deposit ETH and burned when users withdraw. This makes its supply directly tied to lending activity within the Compound protocol.

The value of cETH relative to ETH continuously increases via the exchange rate mechanism. Users also earn COMP governance tokens as an additional incentive for participating in the protocol, whether as lenders or borrowers.

Circulating supply ? 1.11 million CETH
Total supply ? 1.11 million CETH
Max supply ? -- CETH
Updated 4d ago

Ecosystem & Use Cases

  • Earning interest: The primary use case — deposit ETH and let cETH accrue value passively.
  • Collateral: cETH can be used as collateral within the Compound protocol to borrow other assets.
  • DeFi composability: As an ERC-20 token, cETH can be transferred, traded, or used across DeFi applications.
  • Portfolio tracking: cETH balances are integrated into wallets like MetaMask and Coinbase Wallet.

Team, Governance & Community

Compound is governed by holders of the COMP token, which allows them to propose and vote on protocol changes. The Compound community manages parameters such as interest rate models and which assets are listed.

The protocol was built by Compound Labs, with Robert Leshner serving as the public face and founder. Community discussions happen on the Compound governance forum, Discord, and Reddit.

Advantages

  • Passive income: Interest accrues automatically just by holding cETH — no claiming needed.
  • Permissionless access: No KYC, credit checks, or paperwork required to participate.
  • Composability: cETH is a standard ERC-20, making it usable across the broader DeFi ecosystem.
  • Transparent rates: Interest rates are set algorithmically and verifiable on-chain at all times.

Risks & Challenges

  • Smart contract risk: Bugs or exploits in the Compound protocol could put deposited ETH at risk.
  • Liquidation risk: Using cETH as collateral while borrowing other assets can lead to liquidation if collateral value drops.
  • Interest rate variability: Rates fluctuate with market conditions and are not guaranteed.
  • Regulatory uncertainty: DeFi lending protocols may face evolving regulatory scrutiny in various jurisdictions.

Long-Term Vision

Compound's long-term vision centers on becoming a foundational layer for open financial applications on Ethereum. By providing algorithmic, autonomous money markets, the protocol aims to give anyone in the world access to efficient lending and borrowing without relying on traditional financial institutions.

cETH sits at the core of this vision as the gateway for ETH holders to put their assets to work — earning yield while maintaining the composability that defines the DeFi ecosystem.

Frequently Asked Questions

cETH is the receipt token issued by the Compound Finance protocol when a user deposits ETH into its Ether-based lending pool. It represents the user's share of the pool and accrues interest automatically over time.

cETH accumulates interest through an increasing exchange rate. Over time, each cETH becomes redeemable for a greater amount of ETH, meaning holders earn yield simply by holding the token in their wallet.

You get cETH by depositing ETH into the Compound protocol via its interface or by calling the mint function on the cEther smart contract. The protocol then issues cETH tokens directly to your wallet.

Yes, cETH is a standard ERC-20 token and can be freely transferred or traded. However, transferring cETH also transfers your underlying ETH balance in the protocol, so caution is advised.

cETH is a receipt token representing ETH deposited in the Compound lending pool, while COMP is the governance token of the Compound protocol. COMP holders vote on protocol changes; cETH holders earn interest on their ETH.

No. cETH is a separate ERC-20 token that represents ETH deposited in the Compound protocol. Its value grows relative to ETH over time as interest accrues, but it is not directly interchangeable with ETH without redeeming it through the protocol.

The main risks include smart contract vulnerabilities in the Compound protocol, variable interest rates that depend on market conditions, and liquidation risk if cETH is used as collateral for borrowing.

The Compound protocol is governed by COMP token holders, who can propose and vote on changes to protocol parameters. Compound Labs, founded by Robert Leshner, originally built and launched the protocol.