# Overview

An AMO (Algorithmic Market Operations Controller) is an autonomous contract(s) that *enacts arbitrary monetary policy so long as it does not change the price off its peg.* It mints or burns $atETH tokens and performs predefined operations in the market without affecting the pegging, in order to expand protocol liquidity and earn revenue. Since the operations after minting or burning $atETH can be defined by the protocol, unlike stablecoin protocols with a single mechanism, the protocol can formulate complex strategies and leverage more modular DeFi Legos, thus more actively controlling the price peg and bringing income for the protocol.

Currently, the protocol is composed of three kinds of AMOs:

{% content-ref url="/pages/lr4yk9WCtrcczLuoqzKF" %}
[Base AMO](/amo/base-amo.md)
{% endcontent-ref %}

{% content-ref url="/pages/O5ygIYUq3gVgxVDdjw4s" %}
[PSM (Peg Stability Module)](/amo/psm-peg-stability-module.md)
{% endcontent-ref %}

{% content-ref url="/pages/Pigap9XIdL3rRWDaSIG3" %}
[$satETH Vault (staked atETH)](/amo/usdsateth-vault-staked-ateth.md)
{% endcontent-ref %}


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