Islamic Finance Principles Assessment
Riba — Does Yei Finance involve interest?
Yes, Yei Finance is structurally interest-based: as an Aave V3 fork, its core lending function generates revenue from borrower interest, captured partly as protocol/treasury income. This is a foundational riba concern, not an incidental one, since interest-rate spreads are the primary revenue engine. Muslim investors should treat direct exposure to YeiLend's lending/borrowing function, and to CLO rewards funded by it, with caution.
Assessment: Riba Dominant
Score: 27.5/100
Our methodology examines 10 criteria to evaluate how well Yei Finance avoids interest-based mechanisms.
Yei Finance's revenue comes primarily from an interest-rate spread (20% of the borrow rate) captured as treasury income, alongside a 20% liquidation fee and a 0.1% flash-loan fee (a 0.2% borrowing fee is currently waived). DefiLlama data shows roughly $12.6M annualized fees and $4.82M annualized revenue, though quarterly figures show a declining trend through 2025. Because this income is generated directly from borrower interest payments, the treasury itself — funded at 20.5% of token supply, with undisclosed asset composition — is substantially riba-derived, making the base protocol's core function a genuine riba concern for Muslim users.
CLO staking rewards are described as variable, drawn from protocol revenue rather than a fixed rate, which superficially resembles a profit-share (Mudarabah-like) structure rather than a guaranteed interest payment. However, because the underlying revenue pool is substantially composed of borrower interest income from YeiLend, the "profit" being shared is not free of riba at its source. Sources do not clarify lock-up terms, slashing conditions, or the custodial structure of the staking module itself, leaving the reward's precise nature — and its permissibility — unresolved rather than clearly variable-and-clean.
Gharar — How much uncertainty does Yei Finance involve?
Uncertainty here is moderate: strong team transparency and inherited audit history reduce gharar, but incomplete disclosure around treasury composition, staking mechanics, and tokenomics detail leaves real gaps. On balance, informational risk is present but not extreme. Investors should treat undisclosed elements as open questions rather than settled facts.
Assessment: Moderate Gharar (Material Uncertainty)
Score: 51.8/100
Our methodology examines 15 criteria including team transparency, audit quality, and governance.
Yei Finance's team is named and traceable: co-founder Austin Chien (CFA Level II, Duke MBA) appears alongside a CTO, CMO and Senior Smart Contracts Lead in secondary sources, backed by a $2M seed round from named VCs including Manifold, DWF Labs, Kronos Research, Outlier Ventures, Side Door Ventures and WOO Network. One unrelated LinkedIn profile claiming a founder title appears to be unconnected noise rather than genuine project leadership. Code is open-source on GitHub. This level of named accountability and public verifiability meaningfully reduces gharar relative to anonymous or unverifiable teams.
The protocol's Aave V3-inherited codebase carries substantial audit coverage: PeckShield, SigmaPrime, ABDK, OpenZeppelin, Trail of Bits and Certora (2021-2022), plus a dedicated Zellic oracle audit (June 2024) and independent reviews (billh, PeckShield) covering YeiSwap, YeiBridge and TGE contracts. This is a genuinely well-audited protocol, which is a positive factor. However, staking mechanics (lock-ups, slashing, custodial structure) lack documentation — a dedicated staking page could not even be retrieved — and treasury asset composition is undisclosed, leaving meaningful gaps that should be flagged as real gharar concerns.
Maysir — Does Yei Finance involve gambling or speculation?
Yei Finance is not designed as a gambling instrument; it is a functioning money-market and DEX protocol with measurable usage. Some maysir-adjacent risk exists in secondary-market token trading and leveraged borrowing, but this reflects general crypto market behavior rather than the protocol's own design. On balance, the protocol's design is productive rather than speculative.
Assessment: Moderate Maysir (High Risk)
Score: 50.5/100
Our methodology examines 11 criteria to determine whether Yei Finance is a gambling instrument or a genuine economic tool.
Yei Finance provides genuine utility as the leading DeFi protocol on Sei Network, with roughly $229M in TVL and real lending, borrowing, swapping and bridging activity generating measurable fees and revenue. This is productive economic activity — capital allocation, liquidity provision and credit intermediation — rather than a zero-sum bet on price movement. The presence of real DAU, fees and TVL data confirms it functions as actual financial infrastructure rather than a speculative vehicle, which clearly distinguishes it from gambling-style instruments whose sole function is wagering on outcomes.
Against this genuine utility must be weighed the reality that CLO, like most DeFi governance tokens, trades actively in secondary markets where speculative behavior is common, and borrowing/leverage features on YeiLend can be misused for speculative leveraged positions. This potential misuse by third parties does not itself render the protocol impermissible, since the core design serves lending and liquidity functions rather than wagering. With ~12.91% circulating supply and vesting schedules for team/investor allocations, near-term speculative pressure is a market-behavior risk rather than a design flaw.
The Full 27-Point Screening
1. Legitimacy (4 criteria)
| Criterion | Score | Analysis |
|---|
| Team Transparency | 75/100 | The team is named across multiple independent sources (co-founder, CTO/CMO, advisor, smart-contract lead) with credentials disclosed, though one unrelated LinkedIn "founder" profile creates minor identity noise. |
| Fraud & Scam Risk | 70/100 | No hack, rug-pull, or regulatory action tied specifically to this protocol appears in the sources, and named audits plus institutional seed investors support trust. |
| Use Case Legitimacy | 80/100 | The protocol shows measurable TVL, daily active users, and trading/lending/bridge volume, indicating genuine utility rather than pure hype. |
| Ethical Practices | 20/100 | The protocol's own core design is an interest-bearing lending market with a dynamic interest-rate model, an interest-based (riba) mechanism built into the product itself rather than third-party misuse. |
Summary: Yei Finance has a named, credentialed core team and institutional seed backers, with no fraud or hack findings surfaced against the project itself in these sources.
2. Project Operations (9 criteria)
| Criterion | Score | Analysis |
|---|
| Core Protocol Business | 15/100 | The base protocol (YeiLend) is explicitly an interest-paying/charging money market, placing its core business in a sector treated as riba under Islamic law. |
| Transaction Fees | 20/100 | Fees are structured around an interest-rate spread captured by the treasury, a riba-derived extraction rather than a neutral service charge. |
| Treasury Assets | 30/100 | Treasury size is disclosed as a token allocation but its actual asset holdings are not detailed; interest-derived inflows are inferred rather than confirmed. |
| Revenue Model | 15/100 | Revenue is explicitly defined as borrower interest plus a percentage of that interest routed to treasury, making the model interest-based. |
| Transparency | 80/100 | Core contracts are published on GitHub with extensive public documentation of fees, audits, and mechanisms. |
| Governance | 50/100 | Governance is described as staking-gated voting, but proposal process, thresholds and real decentralisation are not detailed. |
| Launch Fairness | 45/100 | The launch included a disclosed TGE, airdrop and IDO, but a sizeable insider allocation with cliff-and-vest terms reflects a conventional VC-style rather than fully fair launch. |
| Token Distribution | 55/100 | Distribution spans ecosystem, treasury, team, investors and community with published percentages, though a third of supply sits with insiders and some sub-allocations remain undisclosed. |
| Speculation/Utility Ratio | 60/100 | Fee and TVL data show genuine utility-driven demand, though commentary also highlights sharp speculative price rallies tied to volume spikes. |
Summary: The protocol is an open-source, Aave-derived lending, swap and bridge platform on Sei with disclosed but insider-heavy token allocations and vesting schedules.
3. Financial Health (4 criteria)
| Criterion | Score | Analysis |
|---|
| Protocol Revenue | 15/100 | Protocol revenue is explicitly derived from borrower interest and an interest-rate spread, a riba-based source. |
| Financial Status | 55/100 | Financials are transparently tracked on public dashboards showing meaningful TVL and revenue, but a declining fee/revenue trend is visible across 2025. |
| Interest Assessment | 10/100 | The base protocol itself is a lending/borrowing market with an algorithmic interest-rate model, making interest native to the protocol rather than a third-party add-on. |
| Audit Quality | 82/100 | Multiple named, reputable firms audited the codebase (PeckShield, SigmaPrime, ABDK, OpenZeppelin, Trail of Bits, Certora via the underlying Aave V3 code, plus Zellic and independent reviewer billh for newer modules) with disclosed dates and findings. |
Summary: Revenue is transparently tracked and substantial but is explicitly interest-based, and the base protocol natively offers interest-bearing lending rather than this being a third-party feature, alongside multiple named security audits.
4. Token Economics (5 criteria)
| Criterion | Score | Analysis |
|---|
| Token Purpose | 65/100 | CLO functions as a utility token for governance, staking and ecosystem incentives rather than existing purely as a speculative meme asset. |
| Governance Rights | 55/100 | Holders can stake CLO to vote on protocol matters, but concrete governance mechanics and scope of authority are not explained. |
| Rewards Distribution | 50/100 | Staking rewards are said to come from protocol revenue (variable in principle), but exact formulas or guarantees are not detailed. |
| Speculation Controls | 45/100 | Vesting cliffs and linear unlocks provide some anti-dump structure, but a secondary analysis notes several allocation percentages remain undisclosed. |
| Asset Backing | 50/100 | The token's value is tied to real protocol usage and revenue rather than a hard reserve asset, but no explicit backing mechanism is described. |
Summary: CLO is a genuine utility/governance token with disclosed fixed supply and vesting terms, though its staking rewards are funded by revenue that is largely interest-derived.
5. Staking Mechanism (5 criteria)
| Criterion | Score | Analysis |
|---|
| Mechanism Type | 45/100 | CLO can be staked for rewards and the underlying protocol is generally non-custodial, but specific staking contract terms (custody, lock-up, flexibility) are not detailed. |
| Islamic Contract Classification | 25/100 | Rewards drawing on revenue that is substantially interest-derived raise an unresolved classification question versus a clean profit-sharing structure. |
| Rewards Structure | 45/100 | Rewards are said to come from protocol revenue rather than a stated fixed rate, but no concrete reward schedule is documented. |
| Documentation | 30/100 (low evidence) | No dedicated staking documentation (lock-up terms, slashing, risk disclosures) was retrievable; a specific staking-terms page returned a not-found result. |
| Shariah Alignment | 25/100 | Because staking rewards trace back to a revenue base largely composed of interest income, a core Shariah question about the reward's permissibility remains unresolved in the available disclosures. |
Summary: A native staking mechanism exists that lets holders earn revenue-based rewards and vote, but documentation on its precise terms, custody and risk disclosures could not be found, and the interest-heavy revenue source leaves its Shariah classification unresolved.
Overall Assessment: Yei Finance is a legitimate, audited, actively used DeFi lending/DEX/bridge protocol, but its core business model of interest-based lending and interest-derived revenue represents the central unresolved Shariah concern across the protocol, its treasury, and its staking rewards.
Written by ThanvirFounder, Ex Director S&P Global Energy
Reviewed by Imam Omar SiddiqiShariah Scholar