> For the complete documentation index, see [llms.txt](https://docs.extrafi.io/extra_finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.extrafi.io/extra_finance/lending.md).

# Lending

- [Introduction to Lending](https://docs.extrafi.io/extra_finance/lending/introduction-to-lending.md)
- [How to use](https://docs.extrafi.io/extra_finance/lending/how-to-use.md)
- [Interest Rate Model](https://docs.extrafi.io/extra_finance/lending/interest-rate-model.md): borrowing rate of lending pools
- [Pseudo-Fixed-Interest-Rate Model](https://docs.extrafi.io/extra_finance/lending/pseudo-fixed-interest-rate-model.md): an optimized interest rate model for Stable Pools & Liquidity Staking Token(LST)-pegged Pools