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What Is Yearn?

Yearn (ticker YFI), launched as yearn.finance and still listed under that name on most exchanges and price trackers, is one of the original yield aggregators in decentralized finance. Its core product is the vault, a pool of user deposits that automatically routes capital into the highest-yielding strategies available on-chain, compounding returns and socializing gas costs so individual users do not have to manage positions themselves. The protocol is non-custodial; deposits are held entirely in smart contracts rather than by a company.

Yearn was created by Andre Cronje, a South African developer who began building the protocol in early 2020 under the name iEarn as a tool to move his own stablecoins between lending markets for the best rate. In July 2020 he relaunched it as yearn.finance and released the YFI governance token in one of the most celebrated token launches in crypto history. All 30,000 YFI were distributed over about a week to users who staked in the protocol's pools. There was no premine, no team allocation, no investor sale, and Cronje kept none for himself. This "fair launch" became a reference point for the whole industry, and YFI's price famously climbed from nearly nothing to more than the price of one Bitcoin within weeks.

The fixed 30,000 supply did not last forever, by the community's own choice. In February 2021, YFI holders passed YIP-57, which minted 6,666 additional tokens, one third vested to key contributors and two thirds sent to the treasury, bringing the total supply to 36,666 YFI. The token governs the Yearn DAO: holders can lock YFI as veYFI (vote-escrowed YFI) to vote on proposals and direct gauge rewards, and the protocol has at times used revenue to buy back YFI on the open market.

Technically, Yearn has gone through several vault generations. The current V3 vaults are built on the ERC-4626 tokenized vault standard, which makes vault shares composable across the wider DeFi ecosystem, and use a modular "tokenized strategy" architecture in which a single vault can allocate across multiple independent strategies. Yearn operates vaults on Ethereum and on networks including Base, Arbitrum, Optimism, Polygon, Sonic, and Katana, and also offers yLockers, products built around vote-escrow tokens such as Curve's.

Yearn's history includes setbacks worth knowing about. In February 2021 a flash-loan attack drained about $11 million from a v1 DAI vault. In April 2023 a misconfigured contract in the deprecated iEarn system was exploited for over $11 million. And in late 2025 an arithmetic bug in the legacy yETH stableswap pool let an attacker mint tokens and drain roughly $9 million, though the core V2 and V3 vaults were unaffected and a portion of the funds was later recovered. Cronje himself stepped back from the project several times, departing DeFi altogether in March 2022 alongside collaborator Anton Nell; he later said that pressure from U.S. SEC inquiries dating back to 2021 played a major role in that decision.

Despite its founder's exit, Yearn has continued as a decentralized organization run by contributors and governed by YFI holders, and it remains one of the longest-running and most battle-tested yield protocols in DeFi, with hundreds of millions of dollars deposited in its vaults.

Getting Started With Yearn

You can use Yearn in two ways: deposit assets into its vaults to earn yield, or hold YFI to participate in governance.

  1. Step 1: Set up an Ethereum-compatible wallet such as MetaMask or Rabby. YFI is an ERC-20 token and Yearn's vaults live on Ethereum and several other EVM networks.
  2. Step 2: To earn yield, visit the Yearn app, pick a vault for an asset you hold (such as a stablecoin or ETH), and deposit. The vault handles strategy allocation and compounding automatically.
  3. Step 3: To participate in governance, acquire YFI on an exchange and withdraw it to your wallet.
  4. Step 4: Lock YFI as veYFI to vote on proposals and direct rewards, or follow the governance forum to see what the DAO is debating.

How to Get a Yearn Wallet?

YFI is a standard ERC-20 token on Ethereum, so any reputable Ethereum wallet can hold it and connect to the Yearn app.

MetaMask

MetaMask is the most widely used Ethereum wallet, available as a browser extension and mobile app. It connects directly to the Yearn app for vault deposits and governance, and supports the other EVM networks where Yearn operates.

Rabby

Rabby is a browser-extension wallet designed for DeFi power users. It previews exactly what each transaction will do before you sign, which is valuable when interacting with vault contracts, and it switches networks automatically.

Hardware Wallets

A Ledger or Trezor device can be paired with MetaMask or Rabby to keep private keys offline. This is the recommended setup for meaningful YFI holdings or large vault deposits.

Yearn Resources

How to Buy Yearn?

With a total supply of only 36,666 tokens, YFI trades at a high per-token price, but it is divisible like any ERC-20 token and you can buy a small fraction.

Centralized Exchanges

YFI is listed on major exchanges including Binance, Coinbase, Kraken, OKX, Bybit, and Gate, typically traded against USD, USDT, or BTC.

Decentralized Exchanges

As one of DeFi's flagship tokens, YFI has deep on-chain liquidity. It can be swapped on Ethereum DEXes such as Uniswap and Curve, or through aggregators like CoW Swap that route across venues for the best price.

Latest Yearn News

Yearn's recent focus has been the V3 vault architecture, which is built on the ERC-4626 standard and now spans multiple networks, including the DeFi-focused Katana chain. Governance has also been active: proposals discussed through 2025 sought to overhaul tokenomics by simplifying the vote-escrow model and directing the bulk of protocol revenue to YFI stakers.

In November 2025 the project weathered a roughly $9 million exploit of its legacy yETH stableswap pool, with the core V2 and V3 vaults unaffected and a portion of the funds recovered in cooperation with partner protocol teams. Because vault lineups, yields, and governance parameters change frequently, the official website, documentation, and governance forum are the best sources for the current state of the protocol.