# Volatile Token AMMs

## Overview

Despite their popularity, many tokens like ETH and BTC can fluctuate wildly in value. Since they are so unpredictable, these 'volatile' tokens make it a bit trickier to design an AMM perfectly tuned to their ups and downs. Nevertheless, it is possible to create a better AMM than the simplistic constant product AMM by using historical price data and fitting that information to a curve with concentrated liquidity.

Shell's initial volatile-to-stable pools are designed so that when the pool's liquidity is split 50-50 across both tokens, the swap rate uses the median dollar value of the volatile token over the last year.

Interested to read more about how these pools were designed? [Learn how to construct an AMM using Proteus.](https://app.gitbook.com/s/8NDihB2RNfi1LyoblpUf/tutorials/build-an-amm-with-proteus)

## Primitives

## `ETH+USD`

* `Pool Address:` [`0xa2dB39e781A5Eee0EAA625dace6F097c17dfF7Ea`](https://arbiscan.io/address/0xa2dB39e781A5Eee0EAA625dace6F097c17dfF7Ea)
* `LP Token ID: 0x3d39f7c71b4be4b2b39924b0aefbe172194c1a8b11ff4e31a74896edead80b02`
* `Component assets:` 
  * `ETH`
  * `DAI`
  * `USDC`
  * `USDT`
* `Fee: 0.25%`

## `WBTC+USD`

* `Pool Address:` [`0x3402D87DF0817b2A96b210b8873d33dD979C8D19`](https://arbiscan.io/address/0x3402D87DF0817b2A96b210b8873d33dD979C8D19)
* `LP Token ID: 0x0e53d22e36f0a0403bacf365d574a97253953118fb462cb766f6a1a34791d493`
* `Component assets:` 
  * `WBTC`
  * `DAI`
  * `USDC`
  * `USDT`
* `Fee: 0.25%`

## `ARB+ETH`

* `Pool Address:` [`0xA16F40437213020A167c230E4667ff8f13640f75`](https://arbiscan.io/address/0xA16F40437213020A167c230E4667ff8f13640f75)
* `LP token ID: 0x977a1e4c16998d4b94d59494909c9503f5bc50642326bc8fa61f2e22761e7a3a`
* `Component assets:` 
  * `ARB`
  * `ETH`
* `Fee: 0.25%`

## `MAGIC+ETH`

* `Pool Address:`[`0x0699645f2fd448398272ae07f82eee8d0388de1c`](https://arbiscan.io/address/0x0699645f2fd448398272ae07f82eee8d0388de1c)
* `LP token: 0xf00fbe5928cf77453911087439475eba4c4ddedd3f3664589eaa91c00e803377`
* `Component assets:` 
  * `MAGIC`
  * `ETH`
* `Fee: 0.25%`

## `REUNI+ETH`

* `Pool Address:`[`0x3917c74FDeC42071E29461c849bceB81cBC3059c`](https://arbiscan.io/address/0x3917c74FDeC42071E29461c849bceB81cBC3059c) 
* `LP token: 0x107a8aad95f88121f288baa229d82a6979de4158e6e0762a53e9ab24b4881c25`
* `Component assets:` 
  * `REUNI`
  * `ETH`
* `Fee: 0.25%`

## `STG+ETH`

* `Pool Address:`[`0xe043EB17Cc12C3fD4f5EaC765D0f1b965975F470`](https://arbiscan.io/address/0xe043EB17Cc12C3fD4f5EaC765D0f1b965975F470)
* `LP token: 0x395b21a145e98bc33138d4bc87a25e7ca0839b05bd16c1ed06476c5ceb5c0bfe`
* `Component assets:` 
  * `STG`
  * `ETH`
* `Fee: 0.25%`