# Partial Collateral Swap (Flexible Position Management)

Helios introduces a **Partial Collateral Swap** that lets borrowers exchange a portion of their locked collateral for another supported asset *without* closing or refinancing the loan. This capability is rare in today’s lending markets and is made possible by Helios’s programmable custody on Bitcoin.

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**1. Workflow Without Helios**

To rebalance collateral in most platforms, a borrower must:

1. Repay the full loan.
2. Withdraw the entire collateral.
3. Swap off-platform into a new asset.
4. Re-deposit and borrow again.

This four-step process incurs multiple network fees, market-spread slippage, and often constitutes a taxable disposal of the original asset.

***

**2. Helios One-Step Swap**

With Helios, the borrower submits a single on-chain instruction. For example, when function call corresponding to below instruction is executed:

```
Swap 0.50 BTC collateral → Taproot-USDT
```

* The protocol atomically converts the specified slice of collateral to the target asset.
* The LTV is re-evaluated in the same transaction; the loan remains open and uninterrupted.

Result: the wallet now shows **0.50 BTC + X USDT** as collateral, all executed inside the vault.

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**3. Key Benefits**

| Objective                     | How the swap helps                                                                                                                                                                                                       |
| ----------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **Volatility control**        | Shift part of the collateral into a stablecoin ahead of a projected BTC draw-down, lowering liquidation risk without exiting the position.                                                                               |
| **Tax optimization**          | By rebalancing *inside* the loan, a borrower could defer recognizing capital gains that would normally arise from an outright sale of appreciated BTC. (Always consult a tax advisor; treatment varies by jurisdiction.) |
| **Treasury agility**          | Corporate desks can fine-tune collateral composition intraday—e.g., dial down BTC exposure before quarterly close—while preserving the original borrowing terms.                                                         |
| **Cross-asset opportunities** | Move collateral into whichever asset currently carries the lower risk weight or higher borrow demand, maximizing capital efficiency.                                                                                     |

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**4. Safety Checks**

* **Real-time LTV validation** – The swap executes only if the post-trade collateral value satisfies all risk parameters.
* **Oracle-verified pricing** – Both sides of the swap use on-chain oracles with [median filters](https://onlinelibrary.wiley.com/doi/full/10.1155/2016/3750264) to prevent manipulation.
* **Single-transaction atomicity** – Either the swap completes with the position healthy, or it reverts with no state change.

***

Helios’s Partial Collateral Swap delivers portfolio-level control, potential tax advantages, and operational simplicity—features that traditional DeFi money markets and even many CeFi desks do not yet offer.