Collateral Factor

What Is Collateral Factor?

Collateral factor (also called the loan-to-value limit or LTV ratio) is the maximum percentage of a deposited asset's value that a lending protocol allows a user to borrow. A collateral factor of 80% on ETH means that depositing $10,000 worth of ETH enables borrowing up to $8,000 in another asset. The remaining 20% serves as a safety buffer that protects the protocol and its lenders from losses if the collateral's value declines.

Collateral factor is one of the most important parameters in DeFi lending. It directly determines how much borrowing power each deposited dollar provides, making it a central consideration for anyone looking to maximize capital efficiency while managing risk.

How Protocols Set Collateral Factors

Collateral factors are not arbitrary — they are carefully calibrated by protocol risk teams or governance communities based on several key characteristics of each asset:

Volatility

The more volatile an asset, the lower its collateral factor. A token that can drop 30% in a day needs a much larger safety buffer than one that rarely moves more than 1%. High volatility means a position can go from healthy to liquidatable in a short time, so the protocol compensates by requiring more collateral per dollar borrowed.

Liquidity

The collateral factor must account for how quickly and cheaply an asset can be sold during liquidation. Deep liquidity (high trading volumes, tight order book spreads, active DEX pools) means liquidators can sell the collateral efficiently without large price impacts. Illiquid assets receive lower collateral factors because selling large amounts would cause significant slippage, potentially leaving the protocol with bad debt.

Market Capitalization

Larger-cap assets like ETH and BTC have higher collateral factors because they are harder to manipulate and tend to have more robust price feeds from oracles. Smaller-cap tokens are more susceptible to price manipulation attacks and sudden liquidity crises.

Oracle Reliability

The protocol needs accurate, timely price data to determine when positions should be liquidated. Assets with well-established oracle infrastructure (multiple data sources, frequent updates, proven track record) can support higher collateral factors. Newer or exotic assets with less reliable price feeds carry more oracle risk and receive lower factors accordingly.

Collateral Factor Examples Across Protocols

To illustrate how collateral factors vary, here are typical ranges you might see across major lending protocols:

• ETH: 75-85% collateral factor across most major protocols. As the most liquid and widely used DeFi collateral, ETH receives some of the highest factors.
• WBTC / cbBTC: 70-80%. Wrapped Bitcoin variants are highly liquid but carry additional bridge or custodian risk, which some protocols account for with slightly lower factors than ETH.
• USDC / USDT: 75-90%. Stablecoins have minimal price volatility, enabling high collateral factors. The exact number depends on the protocol's assessment of the stablecoin's peg stability.
• Smaller-cap tokens: 40-65% or lower. Many are not accepted as collateral at all.
• Novel assets (LSTs, LRTs): 65-75%. Liquid staking tokens are gaining acceptance but often receive moderately conservative factors as protocols gain confidence in their peg stability and liquidity.

These numbers vary across protocols and are updated regularly through governance proposals or automated risk parameter adjustments.

Collateral Factor vs. Liquidation Threshold

It is important to distinguish collateral factor from liquidation threshold — two related but distinct parameters:

• Collateral factor (LTV): The maximum percentage you can borrow against your collateral. This is the ceiling at the moment you open a position.
• Liquidation threshold: The collateral ratio at which your position becomes eligible for liquidation. This is typically set a few percentage points above the collateral factor.

For example, ETH might have a collateral factor of 80% and a liquidation threshold of 82.5%. This means you can borrow up to 80% of your collateral's value, but you won't be liquidated until your debt reaches 82.5% of your collateral's value. The gap between these two numbers provides a small buffer that prevents immediate liquidation after borrowing the maximum amount.

Collateral Factor and Health Factor

Your health factor is directly influenced by the collateral factor of your deposited assets. The health factor formula considers the liquidation threshold of your collateral relative to your current debt level.

A lower collateral factor means you must deposit more value to achieve the same borrowing amount, but it also provides a wider safety margin before liquidation. Conversely, borrowing at or near the maximum collateral factor leaves very little room for price movement before liquidation risk becomes imminent.

E-Mode and Enhanced Collateral Factors

Some protocols offer special modes that increase collateral factors for specific asset pairs. Aave V3's Efficiency Mode (E-Mode), for example, allows significantly higher collateral factors — up to 93% or more — when both the collateral and borrowed assets are correlated. Borrowing USDT against USDC collateral, or borrowing a stablecoin against another stablecoin, qualifies for these enhanced parameters because the price correlation between the pair reduces the risk of the collateral losing value relative to the debt.

E-Mode is particularly useful for capital-efficient strategies like stablecoin yield farming or leveraged staking, where the borrower is exposed to minimal price differential between their collateral and debt.

Why Collateral Factor Matters for Borrowers

Understanding collateral factors helps borrowers make informed decisions:

• Capital efficiency: Choosing assets with higher collateral factors lets you extract more borrowing power from the same deposit. If you have a choice between depositing an asset with a 70% factor versus one with an 80% factor, the latter lets you borrow 14% more per dollar deposited.
• Risk management: Paradoxically, borrowing against assets with lower collateral factors can be safer because it forces a larger buffer between your position and the liquidation threshold. More conservative collateral factors provide more breathing room during market downturns.
• Strategy optimization: For leveraged positions, the collateral factor determines the maximum possible leverage. An 80% collateral factor allows up to 5x theoretical leverage through recursive borrowing (each loop deposits the borrowed funds and borrows again), while a 70% factor caps theoretical leverage at roughly 3.3x.

When comparing lending opportunities across protocols and chains, collateral factor should be evaluated alongside borrowing rates, liquidation penalties, and available liquidity. The highest collateral factor is not always the best choice — it depends on your risk tolerance and strategy.