Crypto Gloss

Silo Finance

Silo Finance is a decentralized lending protocol that enables risk-isolated, permissionless lending markets through a design called “Silos” — isolated two-asset lending pools that prevent the systemic risk inherent in shared-pool lending systems like Compound v2 and Aave v2. In Silo’s architecture, each Silo consists of a specific ERC-20 token paired with a bridge asset (ETH or a designated stablecoin like XAI, Silo’s native stablecoin). Users can: (1) supply the ERC-20 token into its Silo and borrow the bridge asset against it, or (2) supply the bridge asset into any Silo and earn interest. The critical design feature is that liquidity does not cross between Silos: if an attacker manipulates the price of an obscure ERC-20 token and drains its Silo, only the suppliers/borrowers of that specific Silo’s bridge asset are affected — all other Silos remain intact. This makes Silo uniquely capable of supporting long-tail assets that are too risky for Aave’s shared pool (where a single bad asset can harm all depositors). Silo launched in late 2021 on Ethereum and expanded to Arbitrum, where it has achieved its strongest adoption ($100M+ TVL). Silo v2, announced in 2024, introduces improvements including the Silo Vault (ERC-4626 yield vault), more efficient interest rate models, and reduced gas costs. SILO is the protocol’s governance token, used for voting on: risk parameters, supported bridge assets, and protocol fee distribution. XAI is Silo’s overcollateralized native stablecoin designed specifically to function as the bridge asset within Silos.

Key Facts

  • Protocol: Silo Finance
  • Launched: December 2021 (Ethereum)
  • Governance token: SILO
  • Native stablecoin: XAI (bridge asset role)
  • Architecture: Isolated two-asset Silos
  • Bridge assets: ETH, USDC, XAI (per Silo)
  • Chains: Ethereum, Arbitrum (primary)

Why Silos Solve the Shared Pool Problem

Shared pool (Aave v2 example):

  • All assets: in one shared pool
  • If attacker: manipulates niche token price → borrows USDC against fake valuation
  • USDC pool: drained → all USDC suppliers: harmed (unrelated to the niche token)

Silo isolated model:

  • Each token: has its own Silo
  • Bridge asset (ETH/USDC): shared across Silos for efficiency
  • If attacker: manipulates niche token in its Silo → borrows ETH from that Silo only
  • Other Silos: completely unaffected
  • Maximum damage: limited to one Silo’s TVL

Silo Architecture

“`

Silo (Token A / ETH):

Token A: collateral only

ETH: borrowable (supplied by bridge asset providers)

→ suppliers of Token A: can borrow ETH

→ ETH suppliers: earn interest from Token A borrowers

Silo (Token B / ETH):

Token B: collateral only

ETH: borrowable (independent pool from Silo A)

→ completely independent of Token A Silo

“`

XAI: Silo’s Native Bridge Asset

  • XAI: Silo’s native stablecoin
  • Role: Bridge asset in Silos that use XAI instead of ETH/USDC
  • Mechanism: Over-collateralized; ETH/WBTC collateral
  • Integration: Enables more Silo markets to exist without relying on external USDC supply

Related Terms

Sources

  1. “Silo Finance: Solving the Long-Tail Asset Lending Problem” — Bankless / Silo Research (2022-2023). Analysis of Silo’s design solution to the long-tail asset problem — examining why Aave and Compound cannot safely list small-cap assets (shared pool risk), how Silo’s isolated architecture enables lending markets for assets with $10M-100M market caps, and the role of bridge assets (ETH) in connecting Silos without creating cross-Silo contagion.
  1. “Silo’s Arbitrum Success: How Network-Native Assets Drive Protocol Adoption” — DeFi Llama / Silo Arbitrum Analysis (2023). Analysis of Silo Finance’s stronger performance on Arbitrum vs. Ethereum — examining how Silo aligned with Arbitrum-native DeFi projects (ARB, GMX, GLP, GRAIL) that needed lending markets for their own tokens, the network effects of being the leading long-tail lending protocol on Arbitrum, and how Arbitrum’s DeFi ecosystem matured around Silo’s infrastructure.
  1. “Silo v2: The Next Generation of Isolated DeFi Lending” — Silo Protocol / V2 Design Analysis (2024). Analysis of Silo v2’s planned improvements — examining the upgraded architecture (more efficient Silos, ERC-4626 vault support, gas optimization), enhanced risk management features, the role of XAI stablecoin in v2, and whether v2 positions Silo to compete more effectively with Morpho Blue (which overlaps significantly with Silo’s permissionless isolated market thesis).
  1. “Risk Pricing in Isolated Lending: How Bridge Asset Yield Reflects Market Risk” — Gauntlet / Isolated Lending Risk Research (2023). Analysis of how risk is priced in Silo Finance’s bridge asset model — examining how ETH suppliers choose between Silos based on APY (which reflects borrowing demand), why higher-risk Silos offer higher ETH yields (to attract bridge asset capital), and whether the market-based risk pricing mechanism in Silo is more efficient than governance-managed risk parameters in Aave.
  1. “SILO Governance Token: Protocol Fee Distribution and Incentive Design” — Delphi Digital / SILO Token Research (2023). Analysis of SILO’s governance and economic model — examining what SILO token holders control (protocol fee switches, bridge asset approval, Silo listings review), fee revenue from active Silos, SILO staking mechanism, and whether SILO has a sustainable value accrual model relative to the growing TVL and fee revenue from Silo’s lending markets.