> For the complete documentation index, see [llms.txt](https://blend3.gitbook.io/blend-lending-protocol-for-btcfi-edufi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blend3.gitbook.io/blend-lending-protocol-for-btcfi-edufi/interest-rate-mechanism/interest-rate-model/arbitrum.md).

# Arbitrum

The interest rate parameters for Arbitrum are as follow:

<table><thead><tr><th width="135.7734375">Token</th><th width="178.921875">Optimal Utilization</th><th>Variable Rate Slope 1</th><th>Variable Rate Slope 2</th></tr></thead><tbody><tr><td>tBTC</td><td>45%</td><td>4%</td><td>300%</td></tr><tr><td>WBTC</td><td>45%</td><td>4%</td><td>300%</td></tr><tr><td>WETH</td><td>60%</td><td>4%</td><td>300%</td></tr><tr><td>USDT</td><td>80%</td><td>4%</td><td>75%</td></tr><tr><td>USDC</td><td>80%</td><td>4%</td><td>75%</td></tr></tbody></table>