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On this page
  • Importance of Liquidity
  • Interest Rate Model
  • Optimal Utilization Rate
  • Derivation
  • Lending Information

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  1. EARN
  2. Nitron (Lend & Borrow)

Lending

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Last updated 23 days ago

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Users can lend (“supply”) multiple assets at once to earn interest on each of them. Users do not need to set out any specific lending terms.

Importance of Liquidity

The liquidity of the money market is measured by the availability of assets for basic market operations, such as borrowing assets backed by collateral and claiming supplied assets along with accrued yield.

A lack of liquidity will block operations. At any point in time, the liquidity of the protocol can be assessed through the utilization ratio (the share of the reserve that is currently borrowed vs. the supply of each asset).

Interest Rate Model

The Interest Rate Model is central in the management of liquidity risk. As the utilization rate rises, borrowing rises as well (due to the higher price of capital).

The interest earned is determined by a simple linear curve (two straight lines), which is meant to incentivize the utilization rate (i.e. borrowed amount / lent amount), to hit a ratio that has been determined to be optimal via basic supply & demand forces.

Optimal Utilization Rate

In an ideal world, a utilization rate of 100% would be optimal (such that there is no idle capital for lending that is sitting unused).

Demex sets the target utilization rate for individual assets to be less than 100% to allow for the recall of loans by lenders. This is as if there are no assets left for borrowing, lenders will also not be able to withdraw until borrowers repay their loans.

The flip side of this is that the interest paid by borrowers is also diluted by unused capital that is left idle for potential withdrawals, reducing the yield for lenders. The target utilization rate must therefore be carefully balanced.

Here's what happens when utilization is below or above the target rate.

When BELOW Target Utilization Rate

  • Interest rate drops linearly to 0, incentivizing borrowing due to cheaper rates, thereby increasing the utilization rate.

  • The interest rate at the pivot point is estimated and set by the protocol based on a few factors, such as the USD interest rates, perpetual market funding rate, and futures premium rates. If no such factor is available, it will be estimated by using correlated assets or by class-based asset categorization.

When ABOVE Target Utilization Rate

  • As the utilization rate goes above the target point, the borrow interest rate increases rapidly, incentivizing borrowers to quickly repay their debt (and avoid opening new loans), thereby lowering the utilization rate.

More volatile assets require a lower target utilization rate to establish good protocol resilience against market forces.

Derivation

Intuitively, one should be able to see that the lending APR is simply equal to (borrowInterestRate)% x (1-Interest Fee)% x current Utilization Rate.

This is because all interest (after fees) that is paid by borrowers is shared equally among lenders.

The current utilization rate gives the ratio of assets that are not earning interest (as they are not being borrowed) to total assets, diluting the earnings of lenders by that factor.

Lending Information

  1. Click on 'Borrowable Assets' under the 'Assets' toggle.

  2. Click on a specific asset, and you will be directed to the 'Borrowable Asset Details' page.

To view the Lending Info (APR) for a specific asset on

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E.g. Interest Rate Model for ATOM on Carbonscan
E.g. Lending Information for ATOM on Carbonscan