Yei Finance Questions Answered

Yei Finance is a decentralized money market protocol built on the Sei blockchain. At its core, it lets users deposit crypto assets to earn yield and borrow against those deposits without going through any intermediary.

The protocol does not hold custody of funds. Smart contracts govern every interaction — deposits, withdrawals, liquidations, and rate adjustments all happen on-chain. Think of it as a permissionless lending desk that never closes and requires no account approval. The Yei Finance platform currently supports assets including USDC, SEI, WETH, WBTC, USDT, and SolvBTC, with more added as governance decisions are made.

Interest rates adjust algorithmically based on utilization. When a large portion of a pool is borrowed out, rates rise to attract new depositors. When utilization is low, rates fall. That feedback loop keeps the market self-balancing.

Sei is a Layer 1 blockchain purpose-built for trading and financial applications. Its parallelized execution engine processes transactions in a different order than standard EVM chains, which results in significantly lower latency and cheaper gas fees for time-sensitive operations like liquidations.

For a money market, speed matters. A liquidation that takes too long can leave a pool undercollateralized. Sei's architecture reduces that window. Gas costs are also low enough that smaller positions are actually practical — something that became increasingly difficult on Ethereum mainnet after 2021.

The team behind Yei Finance evaluated multiple chains and chose Sei for its finality guarantees and its EVM compatibility layer, which allowed the protocol to ship quickly without rewriting core contract logic from scratch. Bridges to Ethereum and other major networks are available directly inside the Yei Finance interface.

Supplying is a three-step process. First, connect a compatible wallet — MetaMask, Rabby, or any EVM wallet that supports Sei — using the "Connect wallet" button in the top right. Second, select the asset you want to deposit from the market list. Third, enter an amount and confirm the transaction.

Once confirmed, you receive a corresponding yield-bearing token that tracks your balance plus accrued interest. You can withdraw at any time as long as the pool has available liquidity. Interest accrues continuously, not at set intervals, so your balance grows every block.

Supply APYs shown on the market page are variable and reflect the current utilization rate. USDC currently shows one of the higher supply APYs, driven by strong borrowing demand from traders. SEI and WBTC tend to run lower, given their collateral-heavy usage pattern.

Supply APY is what depositors earn on their assets. Borrow APY is what borrowers pay on their outstanding debt. The gap between them — the spread — goes toward the protocol reserve and, in some pools, to token incentive programs.

Both rates are variable by default on Yei Finance. They update block by block as utilization shifts. A pool with 90% utilization will show a high borrow APY and a high supply APY simultaneously, because the protocol is incentivizing more deposits while making borrowing expensive enough to reduce demand.

Some pools in the Yei Finance platform display a bonus APY component from external incentive programs like Jumper Mission Rewards. That bonus gets added on top of the base supply rate, pushing the effective yield higher than the underlying interest alone. Always check the breakdown by clicking the rate figure in the UI.

The Yei Finance protocol contracts have undergone independent security audits. Audit reports are referenced in the official documentation. The codebase follows patterns established by battle-tested protocols like Aave, which reduces novel attack surface.

That said, no smart contract system carries zero risk. Possible failure modes include oracle manipulation, contract bugs in newly added features, and extreme market conditions that outpace liquidation bots. Yei Finance mitigates oracle risk by using multiple price feeds with circuit breakers.

User funds are non-custodial. The team behind Yei Finance cannot freeze withdrawals, move depositor funds, or alter interest rates unilaterally — those parameters require governance actions or are set by immutable algorithmic rules. For additional context on how DeFi lending risk works in general, the Ethereum developer documentation provides useful background material.

Borrowers on Yei Finance must maintain a health factor above 1.0. This number represents the ratio of collateral value to outstanding debt, adjusted by asset-specific liquidation thresholds. When prices fall and your health factor drops below 1.0, part of your collateral gets liquidated.

Liquidators — typically bots monitoring on-chain data — repay a portion of the debt and receive collateral at a small discount as incentive. This keeps the pool solvent without requiring manual intervention from the Yei Finance team.

Suppliers are not directly exposed to borrower default risk in the same way. The protocol's reserve buffer absorbs small shortfalls. Large cascading failures are the scenario that reserve factors and liquidation bonuses are designed to prevent. Monitoring your health factor regularly, especially during volatile periods, is the most effective way to protect a leveraged position.

No. Yei Finance uses an overcollateralized borrowing model. You must deposit assets worth more than what you intend to borrow. The exact ratio depends on the collateral factor of the asset you supply — more volatile assets have lower collateral factors, meaning you can borrow less against them.

This is a deliberate design choice. Undercollateralized lending requires credit scoring or identity verification, which conflicts with the non-custodial nature of the protocol. Flash loans — uncollateralized loans that must be repaid within a single block — are a separate mechanism used by advanced developers for arbitrage and liquidation bots, but they are not exposed as a simple product in the Yei Finance UI.

The main market on Yei Finance currently accepts USDC, SEI, WETH, WBTC, USDT, and SolvBTC as collateral. Each asset has its own loan-to-value ratio and liquidation threshold set by the protocol's risk parameters.

Stablecoins like USDC and USDT carry higher LTV ratios because their price is relatively predictable. SEI and WETH sit in a middle tier. SolvBTC, being a wrapped Bitcoin derivative, has conservative parameters given its slightly higher price volatility compared to native BTC.

Additional assets — including some marked as "Low Liquidity" in the interface — may be deposited but with restricted borrowing capabilities. The about page lists the protocol's approach to asset onboarding and risk assessment in more detail.

The Main Market is the primary lending pool on Yei Finance where most assets trade. The Solv Market is a dedicated sub-market designed around SolvBTC and related Bitcoin-backed assets. It has separate liquidity pools, independent risk parameters, and distinct interest rate curves.

Why separate it out? Bitcoin-backed assets attract a specific user base — long-term BTC holders who want to borrow stablecoins against their position without selling. Isolating that demand into its own pool prevents cross-contamination of risk and lets the protocol tune parameters specifically for BTC collateral dynamics.

The Injective Market is a third sub-market serving users bridging from the Injective network. All three markets are accessible from the same Yei Finance interface, with the tab switcher at the top of the markets page.

The Yei Finance protocol does not currently have a live governance token in public circulation. The platform does run incentive campaigns through third-party programs — the Jumper Mission Rewards visible in the USDC pool are one example — where external tokens are distributed to active users.

A points system is in place to track user activity. Points earned on Yei Finance may translate into future token allocations depending on how the protocol's tokenomics develop. The Points section in the sidebar shows your accumulated balance. Details on any future token launch would be announced through official channels: the Yei Finance Twitter account and Discord server.

The bridge in the Yei Finance sidebar lets users move assets between Sei and other supported networks — Ethereum, Arbitrum, Optimism, and a few others — without leaving the app. It aggregates routing from cross-chain bridge protocols to find a path for your transfer.

Mechanically: you select the source chain, the destination chain (Sei, for most incoming flows), and the asset. The bridge calculates the estimated output after fees and slippage. You approve and sign two transactions — one on the source chain to release funds, one on the destination chain to receive them.

Bridge transactions carry their own risk profile separate from the lending protocol itself. Delays can occur when a bridge's relayers are congested. Always start with a small test transfer to confirm the route works before bridging a large amount.

Centralized platforms hold custody of your assets. That means you are exposed to the platform's solvency, regulatory actions against the company, and withdrawal freezes — all of which have materialized at multiple large CeFi lenders since 2022.

Yei Finance eliminates counterparty risk at the platform level. No company controls your deposited funds. Smart contracts execute the rules. Withdrawals cannot be blocked by a decision from management or in response to regulatory pressure targeting the operator.

The tradeoff is complexity. DeFi requires you to manage your own wallet keys, understand liquidation mechanics, and monitor positions yourself. For users comfortable with those responsibilities, the non-custodial model is a meaningful structural advantage over centralized alternatives.

Yei V2 is the current version of the Yei Finance protocol. It introduces improved risk isolation, refined interest rate models, and support for the multi-market architecture that splits assets into Main, Solv, and Injective pools. The toggle in the top right of the interface switches between versions.

V1 remains accessible for users who have open positions they have not migrated. New deposits should go into V2. The team behind Yei Finance has concentrated liquidity incentives and new asset listings on V2, so the available yield and asset selection there are materially better.

Migration from V1 to V2 is not automatic. You need to withdraw from V1 and re-deposit into V2 manually. There is no gas-free migration path currently available.

You can, but a few steps come first. You need a self-custody wallet — MetaMask is the most widely documented option. You need Sei network configured in that wallet, and you need SEI tokens to cover gas fees. Gas on Sei is cheap, often under a cent per transaction, but you still need a small amount to get started.

The Yei Finance interface is cleaner than many DeFi applications. The market table shows supply APY, borrow APY, total supplied, and total borrowed in one view. The action panel on the right handles supply, withdraw, borrow, and repay from a single tabbed component. Most operations take under a minute once your wallet is connected.

Start small. Deposit an amount you are comfortable with while you learn how the health factor changes when you borrow. The main market page always shows current live rates with no login required, so you can study the numbers before committing any funds.

When a borrower's health factor falls below 1.0, their position becomes eligible for partial liquidation. Any third party — typically an automated bot — can trigger the liquidation by repaying a portion of the outstanding debt on behalf of the borrower.

In return, the liquidator receives the equivalent value in collateral plus a liquidation bonus, which serves as the economic incentive to run liquidation infrastructure. The bonus percentage varies by asset — more volatile collateral carries a higher bonus to compensate for the additional price risk the liquidator takes on during the process.

The borrower retains whatever collateral is not seized. Partial liquidations are designed to restore health factor above 1.0 with the minimum collateral sold, so borrowers do not necessarily lose everything in a single event. If the market continues moving against them and the health factor drops again, a second liquidation can occur. Borrowers near the threshold should repay debt or add collateral rather than waiting to see what happens.