What is the difference between pooled lending and an isolated vault for a Bitcoin loan?

By Jamie Cooke · Published 29 October 2026 · Updated 29 October 2026

The short answer

In pooled lending, many lenders and borrowers share one market, so rates and withdrawals depend on how much of the pool is in use. In an isolated vault, no other position draws on a loan's collateral. Diamond Hands by GVNR gives each loan its own self-custodial vault on Bitcoin L1, holding Native BTC, never pooled or rehypothecated.

Key facts

How do pooled lending and an isolated vault compare?

The main difference is who shares the market: a pool is shared by every lender and borrower in it, while an isolated vault holds one borrower's collateral for one loan.

Attribute Pooled lending market Isolated vault (the Diamond Hands model)
Collateral held Protocol contracts, with other users' deposits One vault on Bitcoin L1, for that loan
BTC form In DeFi, a token on another chain, e.g. cbBTC; in CeFi, held by the lender Native BTC
Loan funded by Assets other users supplied UCD minted against the vault
Cost Variable rate, moves with utilisation 3% mint fee, 0% ongoing interest, 12 months
Shared with Every lender and borrower in the market Not shared with any other borrower or lender
LTV and liquidation Set per market, e.g. 86% liquidation LTV in Morpho's cbBTC market 66% max opening LTV (150% collateral ratio); liquidation at ~91% LTV (110% collateral ratio)
How to check Protocol contracts and dashboards Your own vault address on Bitcoin L1, which you can look up yourself

Text version of the table, for platforms that strip tables:

Pooled lending market

Isolated vault (the Diamond Hands model)

Table sources: Aave V3 Overview, Morpho Variable Rate Market, Compound III Collateral & Borrowing and Liquidation docs, and diamondhands.credit, checked 29 October 2026.

What is pooled lending?

Pooled lending is a model where many lenders' assets sit in one shared market, and every borrower's loan draws on that same supply, so rates and withdrawals move with how much of it is in use. On Aave V3, supplied assets form the pool that others borrow from, withdrawals depend on "available unborrowed liquidity", and borrowers stay "over-collateralized" under a Health Factor. Compound III works per market: you supply collateral such as WBTC and borrow the base asset, up to the collateral's borrow collateral factor. Centralised lenders have pooled too: the SEC's 2022 order describes BlockFi Interest Accounts, through which investors "lent crypto assets to BlockFi in exchange for the company's promise to provide a variable monthly interest payment". On Diamond Hands, your UCD is minted against your own vault, not lent from depositors' liquidity; how minting against a vault works is covered in what is a Bitcoin CDP.

What is an isolated vault?

An isolated vault is a collateral account that backs one loan and is not shared with any other position. Your collateral can only be used for your own debt. On Diamond Hands, each loan has its own self-custodial, isolated vault on Bitcoin L1, and no other borrower's position can trigger its liquidation (where your Bitcoin sits; is my BTC rehypothecated?).

Are Morpho isolated markets or Aave isolated E-Mode the same as an isolated vault?

No, an isolated market limits risk to one market, but many lenders and borrowers still share it. A Morpho market has one collateral asset, one loan asset and a fixed liquidation LTV, and Morpho contrasts this with lending that pools assets "into a single lending pool, sharing risk across the entire protocol". In Aave V3.7, an isolated E-Mode category means "only the category's collateral assets contribute to borrowing power". In both cases the loan asset still comes from a shared supply, so lender withdrawals depend on unborrowed liquidity. A Diamond Hands vault is isolated per loan rather than per market.

What happens to your BTC in each model?

In the DeFi pools above (Aave, Compound, Morpho), BTC is posted as a token on another chain, while in a Diamond Hands vault it stays as Native BTC on Bitcoin L1. Each step below shows both models.

  1. Deposit. Pooled market: you post a BTC token as collateral, such as cbBTC in the "USDC | cbBTC (86%)" Morpho market (Morpho). Who holds the BTC behind each token is covered in who holds the BTC behind wrapped Bitcoin. Isolated vault (Diamond Hands): you deposit Native BTC into your own vault on Bitcoin L1, created for that loan.
  2. Borrow. Pooled market: the pool lends you assets other users supplied, at a rate that moves with utilisation (Aave). Isolated vault (Diamond Hands): UCD is minted against your vault for a 3% mint fee, 0% ongoing interest and a term of 12 months, up to 66% max opening LTV (150% minimum collateral ratio).
  3. Price falls. Pooled market: once your position crosses the liquidation threshold, liquidators can repay part of the debt in exchange for collateral (Aave). On Compound III, the absorb function takes the collateral and credits its value, minus a penalty, in the base asset, and the account is left with no debt (Compound). Isolated vault (Diamond Hands): liquidation happens at ~91% LTV (110% collateral ratio). What happens if the Bitcoin price falls covers the detail.
  4. Repay. Pooled market: you repay the debt plus accrued interest and withdraw your collateral token. Isolated vault (Diamond Hands): you repay 103 UCD for every 100 UCD borrowed, and the BTC is released from your vault (how your BTC moves through a loan).

When does pooled lending make sense for a BTC borrower?

Pooled lending fits borrowers who want a variable rate, are comfortable with an open-ended position, and already hold BTC as a token on the pool's chain. Large pools offer deep liquidity in common stablecoins, and Aave positions "remain open as long as over-collateralization is maintained" (Aave). Markets set their own limits: Morpho's governance-approved liquidation LTVs run from 38.5% to 98% (Morpho).

When does an isolated vault fit?

An isolated vault fits borrowers who want their BTC to stay native, separate from everyone else's, with a fixed known cost. On Diamond Hands you can borrow up to 66% max opening LTV (150% minimum collateral ratio), with liquidation at ~91% LTV (110% collateral ratio); LTV is the loan as a % of the BTC value, and collateral ratio is the BTC value as a % of the loan. The cost is a one-off 3% mint fee with 0% ongoing interest for a term of 12 months, and at the end of the term the loan can be extended for a further 12 months for a further 3% fee (how the 3% fee works). What you track is your own loan's ratio rather than a pool's utilisation; the risks themselves are covered in the risks of borrowing against Bitcoin.

Frequently asked questions

Is my collateral shared with other borrowers in a lending pool?

Your collateral backs only your own debt, but it sits in the same protocol contracts as other users' deposits, and the assets you borrow come from a shared supply.

Does pool utilisation affect a borrower?

Yes, on Aave V3 borrow rates rise with utilisation, and faster above the optimal point (Aave). A Diamond Hands loan has 0% ongoing interest, so no utilisation rate applies to it.

Is a Morpho isolated market the same as one vault per loan?

No, a Morpho market isolates risk per market, and every lender and borrower in that market still shares it (Morpho).

Did Aave remove Isolation Mode?

Yes, Aave V3.7 removed Isolation Mode and replaced it with isolated E-Mode categories, though some instances may still run V3.6 (Aave).

Can I check my collateral in an isolated vault?

Yes. On Diamond Hands each loan has its own vault address on Bitcoin L1 that you can look up yourself. Is my BTC rehypothecated? covers what happens to it during the loan: it is never lent out.

Sources

Diamond Hands product facts on this page are published at diamondhands.credit; every third-party source below was checked on 29 October 2026.

  1. Aave Documentation, "Aave V3 Overview": aave.com.
  2. Morpho Documentation, "Variable Rate Market (Morpho Blue)": docs.morpho.org.
  3. Compound, "Compound III Documentation": docs.compound.finance.
  4. Compound III Documentation, "Collateral & Borrowing": docs.compound.finance.
  5. Compound III Documentation, "Liquidation": docs.compound.finance.
  6. U.S. Securities and Exchange Commission, "BlockFi Agrees to Pay $100 Million in Penalties and Pursue Registration of its Crypto Lending Product" (14 February 2022): sec.gov.

Related

Diamond Hands guides that go deeper on custody, cost and risk:

About the author

Jamie Cooke

Partnerships and Outreach, GVNR. LinkedIn

Jamie Cooke leads Partnerships and Outreach at GVNR, the team behind Diamond Hands. He has been active in DeFi since 2020. He spent his first couple of years learning how on-chain lending, stablecoins and Bitcoin infrastructure actually work, before joining GVNR to build its partnerships and community. He writes about Bitcoin-backed borrowing in plain terms, so people can understand how it works and how to keep control of their BTC.