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Adding liquidity puts two tokens from your margin account into a Soroswap or Aquarius pool. You get LP shares back in the margin account; they earn the pool’s trading fees and count as collateral.
Farm XLM / SoUSDC LP Soroswap pool page with XLM Reserve 219.40K, SoUSDC Reserve 37.24K, Fee Rate 0.30% and Total LP Shares 87.44K, a My LP Position chart with 599.38 LP shares worth $510.80 and 0.69% share of pool, and an Add Liquidity form with 10 XLM and 1.70 SoUSDC, showing You will receive about 3.99 LP shares backed by 10 XLM plus 1.70 SoUSDC

The Soroswap XLM / SoUSDC pool page: reserves, fee and total LP shares on top, your LP position on the left, Add Liquidity on the right. Click the image to zoom.

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Add liquidity

1

Open the pool

On Farm → LP/Multiple Assets, click the pair.
2

Enter one side

On Add Liquidity, type an amount for either token. The other side fills in automatically from the pool’s live price (shown as “1 XLM ≈ … SoUSDC”). Margin under each field is what your account holds.
3

Check the summary

You will receive (estimated LP shares), Backed by (both amounts) and Share of pool.
4

Sign

Approve the transaction.
You need both tokens in the margin account. Get SoUSDC or AqUSDC by borrowing it, swapping for it, or transferring it in.

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Remove liquidity

On Remove Liquidity, choose how many LP shares to burn (100% uses your exact balance) and sign. Both tokens return to your margin account. Removing liquidity doesn’t repay debt or send anything to your wallet.

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Good to know

  • Collateral value is conservative. The Risk Engine values an LP position at twice the smaller side of its share of the reserves, which can be a little less than a DEX shows.
  • Impermanent loss. If XLM moves against USDC, your LP holds more of the falling token. With borrowed funds, that loss hits your health factor.
  • Liquidation. If the account is liquidated, LP shares are transferred to the liquidator as they are.
See Health Factor.