> ## Documentation Index
> Fetch the complete documentation index at: https://docs.askloyal.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Same-Mint Optimization

> How Earn moves between approved USDC reserves without changing the asset you hold.

Same-mint optimization means the asset mint does not change. In Earn today, the source and destination are both USDC positions.

That matters because the system can compare USDC reserves without adding swap routes, quote risk, or a different stablecoin exposure.

## The Problem With A Static Farm

Kamino reserves do not all pay the same rate forever. A reserve can raise its supply APY to attract liquidity, then cool down later. If your USDC stays parked in one reserve, it can miss those windows.

Earn tries to capture more of the available market rate by moving only when the current route is allowed and useful.

## How A Same-Mint Move Works

<Steps>
  <Step title="Read the current position">
    The system reads the Earn vault and the current Kamino obligation from chain state.
  </Step>

  <Step title="Compare approved reserves">
    It compares eligible Kamino USDC reserves using market data.
  </Step>

  <Step title="Require a positive edge">
    A move is considered only if the target reserve is better enough to justify action.
  </Step>

  <Step title="Check the policy">
    The selected route must match the active Earn policy before it can be submitted.
  </Step>

  <Step title="Withdraw and deposit">
    The route withdraws from the source USDC reserve and deposits into the target USDC reserve.
  </Step>
</Steps>

## What Earn Does Not Do Today

* It does not swap your Earn USDC into another token
* It does not borrow against the position
* It does not enter liquidity-provider positions
* It does not rebalance just because a rate changed by a tiny amount
* It does not bypass policy checks to reach a better-looking market

<Note>
  Skipping a move is normal. If the account state, policy, market data, or expected edge is not good enough, doing nothing is the safer result.
</Note>