> For the complete documentation index, see [llms.txt](https://nebula-18.gitbook.io/nebula/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nebula-18.gitbook.io/nebula/token/tokenomics/revenue-model.md).

# Revenue Model

#### 2.1 Borrowing Fees

**Dynamic Fee Structure**

Borrowing fees are calculated based on real-time factors, including pool utilization rates, asset volatility, and borrower risk profiles. This dynamic approach ensures fair and market-reflective fees.

**Fee Distribution**

Collected fees are allocated among:

* Liquidity providers (as part of their interest earnings).
* The protocol treasury (for development and maintenance).
* The insurance fund (for risk mitigation).

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#### 2.2 Interest Rate Spread

**Protocol Earnings**

Nebula captures a small spread between the interest rates paid by borrowers and those earned by suppliers. This contributes to protocol revenue without imposing significant costs on users.

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#### 2.3 Liquidation Penalties

**Penalty Allocation**

When a borrower's collateral is liquidated due to under-collateralization, a penalty fee is imposed. Portions of this fee are directed to:

* The insurance fund.
* The protocol treasury.
* Token buyback and burn operations.

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#### 2.4 Protocol Treasury

**Funding Initiatives**

The treasury finances ongoing development, security audits, marketing efforts, and ecosystem growth projects. This ensures the protocol can evolve and adapt to market needs.

**Transparent Governance**

Expenditures from the treasury are subject to governance approval, ensuring that funds are allocated in a manner consistent with the community's interests.