Selling a crypto asset is not the only way to obtain dollar-denominated liquidity. A user who holds HYPE, tokenized Bitcoin or another approved asset may prefer to keep that market exposure while accessing capital for trading, portfolio management or other DeFi activity.
Felix Protocol makes this possible through its collateralized debt position system.
The model follows a clear sequence: deposit approved collateral, mint feUSD, manage the resulting debt position and repay the stablecoin when the capital is no longer needed. The collateral remains locked inside the protocol while the debt is active.
This arrangement gives users liquidity without an immediate sale, but it also creates an obligation. The borrower must pay interest, maintain sufficient collateral and respond if the position moves toward liquidation.
Felix CDP positions also include a second consideration that is less common in standard lending markets. Borrowers select their own annual interest rate. A lower rate reduces financing costs but places the position closer to the front of the feUSD redemption queue. A higher rate costs more but generally reduces redemption exposure.
Understanding Felix CDP therefore requires more than learning how to mint a stablecoin. Users need to understand collateral ratios, debt growth, interest-rate selection, repayment, liquidation and redemptions.
Used conservatively, the system can turn long-term crypto holdings into productive collateral. Used aggressively, the same mechanism can expose those holdings to forced liquidation or an unexpected reduction through redemptions.
What Is a Felix CDP?
A Felix CDP is a collateralized debt position used to mint feUSD.
The user deposits an asset accepted by Felix Protocol and creates a debt position against its value. The borrowed amount is issued as feUSD, an overcollateralized synthetic dollar designed to trade close to one US dollar.
The position contains two main components:
-
Collateral deposited by the user
-
feUSD debt owed to the protocol
The collateral must be worth more than the debt. This overcollateralization creates a safety buffer against market volatility.
If the borrower deposits collateral worth $10,000 and mints 4,000 feUSD, the position initially has significantly more asset value than debt. If the collateral price falls, that buffer becomes smaller.
The borrower remains responsible for keeping the Felix CDP above its liquidation threshold.
Unlike a conventional loan, a Felix CDP does not depend on personal identity, income checks or a traditional credit score. Borrowing capacity comes from the on-chain collateral committed to the position.
Why Felix Protocol Uses Overcollateralization
feUSD is created without a centralized custodian holding one dollar in a bank account for every token.
Instead, circulating feUSD is backed by crypto collateral locked in Felix Protocol smart contracts. Because crypto prices can change rapidly, issuing one feUSD against exactly one dollar of volatile collateral would leave almost no protection against a market decline.
Overcollateralization solves this problem by requiring borrowers to deposit more value than they mint.
The additional value performs several functions:
-
It protects feUSD solvency during ordinary volatility.
-
It gives liquidators an economic buffer.
-
It reduces the probability of bad debt.
-
It helps maintain confidence in the stablecoin’s backing.
-
It allows the protocol to process unhealthy positions before collateral becomes insufficient.
The required threshold can differ between collateral branches because different assets have different volatility, liquidity and oracle characteristics.
An established asset with deep liquidity may support different parameters from a newer token or complex wrapped position.
Overcollateralization reduces risk, but it does not eliminate it. A sufficiently fast market decline can still push a Felix CDP toward liquidation.
The Felix CDP Lifecycle
A complete Felix Protocol debt position generally follows five stages.
1. Deposit Collateral
The user selects an approved asset and transfers it into the Felix CDP system.
2. Mint feUSD
The borrower chooses how much feUSD to create against the deposited collateral.
3. Select an Interest Rate
Felix Protocol allows the borrower to set an annual rate for the position.
4. Manage the Position
The user can add collateral, repay debt, borrow more feUSD, adjust the rate or withdraw excess collateral while remaining within protocol limits.
5. Close the Position
The borrower repays the full outstanding debt and applicable accrued costs. The remaining collateral is then returned.
The duration is flexible. A Felix CDP does not have a conventional maturity date. It can remain open while the collateral ratio stays above the required threshold and the borrower accepts the ongoing interest cost and redemption exposure.
How to Mint feUSD Through Felix Protocol
The user begins by connecting a compatible wallet and opening the Felix Protocol borrowing interface.
The live market displays the supported collateral branches and relevant parameters. The borrower chooses the asset to deposit and enters the desired collateral amount.
The next step is selecting how much feUSD to mint.
Felix Protocol then shows the projected collateral ratio, position health, debt and borrowing cost. The user can accept the default interest rate or choose another rate through the available controls.
After reviewing the position, the user approves the collateral transfer and confirms the borrowing transaction.
Once the transaction is complete:
-
The collateral is locked in the Felix CDP.
-
The position records a feUSD debt balance.
-
The selected interest rate begins applying.
-
The newly minted feUSD becomes available to the borrower.
The feUSD can be held, traded or deployed elsewhere, but the underlying debt remains active until it is repaid or otherwise reduced.
What Is the Collateral Ratio?
The collateral ratio compares the dollar value of the deposited asset with the value of the feUSD debt.
A simple representation is:
Collateral ratio = collateral value ÷ debt value × 100
If a Felix Protocol user deposits $15,000 of collateral and mints 5,000 feUSD, the initial collateral ratio is 300%.
If the collateral later falls to $10,000 while the debt remains near 5,000 feUSD, the ratio falls to 200%.
If the collateral continues falling, the position approaches the liquidation threshold.
The ratio can also weaken when interest increases the debt. Even if the collateral price remains unchanged, the amount owed grows over time.
A higher collateral ratio generally means a larger safety buffer. A lower ratio makes capital more efficient because the user borrows more against the same collateral, but it also increases liquidation risk.
Collateral Ratio Versus Loan-to-Value
Loan-to-value, or LTV, describes the same relationship from the opposite direction.
LTV = debt value ÷ collateral value × 100
A position containing $15,000 of collateral and 5,000 feUSD of debt has an LTV of approximately 33.3%.
The collateral ratio is 300%.
When collateral falls:
-
LTV rises.
-
The collateral ratio falls.
-
Position health deteriorates.
-
Liquidation risk increases.
When the borrower adds collateral or repays feUSD:
-
LTV falls.
-
The collateral ratio rises.
-
Position health improves.
Beginners often find LTV easier for understanding how much of their collateral value has been borrowed. The collateral ratio is useful for measuring the size of the remaining buffer.
Both metrics describe the same economic position.
How Much feUSD Should a User Mint?
Felix Protocol determines the technical maximum, but that maximum should not be treated as a borrowing target.
A more responsible borrowing amount depends on:
-
Collateral volatility
-
Expected holding period
-
Monitoring frequency
-
Access to repayment liquidity
-
Personal risk tolerance
-
Market conditions
-
Interest costs
-
Intended use of feUSD
Felix documentation provides general examples suggesting that more active users may operate with lower collateral ratios, while users seeking a more passive position may prefer substantially larger buffers.
These examples are educational rather than guarantees. A collateral ratio that appears conservative under normal conditions can still become unsafe during an extreme market event.
A user holding volatile collateral should ask how the position would behave after a 20%, 30% or larger decline.
The safest amount is not necessarily the largest amount Felix Protocol permits. It is the debt level the user can manage during adverse conditions.
How Debt Grows
The initial feUSD amount is not always the final amount required to close the Felix CDP.
Interest accrues according to the borrower-selected annual rate. Depending on the action and protocol conditions, applicable upfront or adjustment fees may also be added to the debt.
Suppose a user mints 10,000 feUSD at a 5% annual rate.
Ignoring compounding details and additional fees, the position would accrue approximately 500 feUSD of interest over one year.
The growing debt affects the borrower in two ways.
First, it increases the repayment amount.
Second, it gradually weakens the collateral ratio.
A long-running position therefore requires monitoring even when the collateral price is stable.
Borrowers should evaluate the full cost of capital rather than focusing only on how much feUSD they receive initially.
Borrower-Selected Interest Rates
The ability to select an interest rate is one of the defining features of Felix CDP.
A borrower may prefer a low rate because it reduces the cost of maintaining debt. However, Felix Protocol uses interest rates to order positions during feUSD redemptions.
Positions paying the lowest rates are generally affected first.
This creates a market-based trade-off:
Lower Interest Rate
-
Reduces ongoing borrowing cost
-
Places the Felix CDP closer to the front of the redemption queue
-
Requires more active monitoring
-
May suit shorter-term borrowers who can adjust quickly
Higher Interest Rate
-
Increases financing cost
-
Places more lower-rate debt ahead of the position
-
Reduces relative redemption exposure
-
May suit longer-term or less active borrowers
The best rate is not automatically the lowest one. It should reflect the borrower’s intended duration, monitoring habits and willingness to lose collateral exposure through redemptions.
Felix Protocol may display a median or prevailing market rate to help users understand where their position sits relative to other borrowers.
Adjusting the Interest Rate
Borrowers can change the annual rate of an existing Felix CDP.
Increasing the rate can move the position farther back in the redemption ordering. Lowering it can reduce borrowing costs but increase redemption priority.
Rate changes may involve an upfront adjustment fee. Official documentation also describes a premature-adjustment charge when the rate is changed within a defined period after opening the position or making a previous adjustment.
This mechanism discourages borrowers from repeatedly changing rates to avoid the normal economics of the system.
Before adjusting, a user should compare:
-
The new annual interest cost
-
The applicable adjustment fee
-
Current feUSD market price
-
Recent redemption activity
-
Median borrower rate
-
Expected remaining loan duration
Paying a fee to increase the rate may be reasonable during strong redemption pressure. For a position that will be closed shortly, the extra cost may not be justified.
What Are feUSD Redemptions?
Redemptions help support the feUSD price near one dollar.
When feUSD trades below its intended target, a market participant can buy the discounted token and redeem it through Felix Protocol for approximately one dollar of collateral per feUSD, minus an applicable fee.
This produces two stabilizing effects:
-
Arbitrageurs buy feUSD from the market.
-
The redeemed feUSD is removed from circulation.
Felix Protocol cancels debt starting with the lowest-interest-rate positions.
If a Felix CDP is affected, part of its debt is repaid automatically and a corresponding dollar value of collateral leaves the position.
The borrower does not receive a liquidation penalty, and the position may remain healthy. However, the user loses some exposure to the deposited asset.
For someone who borrowed against HYPE because they expected it to appreciate, an unexpected redemption may reduce the very exposure they wanted to preserve.
Redemptions Versus Liquidations
These mechanisms are often confused, but they serve different purposes.
Redemption
A redemption occurs because feUSD trades below its target and a holder exchanges it for collateral.
The borrower’s position may be healthy.
Effects include:
-
Debt is reduced.
-
A corresponding amount of collateral is removed.
-
No standard liquidation penalty applies.
-
Lowest-rate positions are affected first.
-
The position may remain open.
Liquidation
A liquidation occurs because the Felix CDP falls below its required safety threshold.
Effects include:
-
The unhealthy debt is cancelled.
-
Collateral is transferred through the liquidation process.
-
The borrower faces a liquidation penalty or economic loss.
-
Stability Pool liquidity may be used.
-
The position may be partially or fully closed.
Redemptions protect the feUSD price. Liquidations protect system solvency.
Borrowers need to manage both.
How Liquidation Works in Felix CDP
When a Felix CDP becomes undercollateralized, independent keepers can trigger the liquidation process.
feUSD from the Stability Pool associated with the collateral branch is burned to cancel the unhealthy debt. The borrower’s collateral is then transferred to Stability Pool participants, subject to the protocol’s liquidation economics.
A small incentive may compensate the actor who executes the liquidation.
The borrower can lose collateral and incur a penalty. The goal is to close the position before it creates bad debt for the wider feUSD system.
Liquidation risk increases when:
-
The collateral price falls
-
Debt grows through interest
-
The borrower mints more feUSD
-
Too much collateral is withdrawn
-
The collateral asset depegs
-
Oracle pricing moves sharply
-
Market volatility increases
Liquidation is automatic and permissionless. Felix Protocol does not need to contact the borrower or wait for consent once the threshold has been crossed.
How to Improve Felix CDP Health
There are two primary ways to strengthen an existing position.
Add Collateral
The user deposits more of the approved asset into the Felix CDP.
This increases the value supporting the same debt and improves the collateral ratio.
Repay feUSD
The borrower returns part of the feUSD debt.
This reduces the liability supported by the same collateral and also improves the collateral ratio.
Repayment is often more efficient when the user already holds feUSD. Adding collateral may be preferable when the borrower wants to retain the borrowed capital and has additional assets available.
Users can also combine both actions.
The important principle is to react before the position approaches liquidation. During severe volatility, network congestion and price movement may make last-minute management difficult.
Borrowing More feUSD
Felix Protocol allows users to increase the debt of an existing position when sufficient collateral is available.
Borrowing more can release additional liquidity, but it reduces the safety buffer.
Before increasing debt, the user should review:
-
New collateral ratio
-
Revised position health
-
Additional upfront fees
-
Higher annual interest expense
-
feUSD market conditions
-
Planned use of the borrowed funds
-
Ability to repay if the collateral declines
Borrowing more because collateral has appreciated can be tempting. However, crypto gains can reverse quickly.
A healthier approach is to preserve part of the improved collateral buffer rather than immediately using all newly available borrowing capacity.
Withdrawing Collateral
A borrower may withdraw excess collateral from a Felix CDP if the remaining position stays above the required threshold.
This can be useful when:
-
The collateral price has increased
-
Part of the debt has been repaid
-
The user wants to reduce protocol exposure
-
The borrower needs the underlying asset elsewhere
Removing collateral weakens the position.
Felix Protocol should prevent a withdrawal that would directly violate the minimum requirement, but a transaction can still leave the position with very little protection against future volatility.
The same risk discipline should apply to withdrawals as to new borrowing. The technical maximum is not necessarily a sensible amount.
Repaying feUSD Debt
A borrower can repay part of the debt at any time.
Partial repayment reduces the outstanding obligation and improves the collateral ratio. It can be used as a risk-management action when the collateral price falls or interest costs become unattractive.
To close the Felix CDP completely, the user must repay the full outstanding debt, including accrued interest and any relevant fees or redistributed amounts reflected by the protocol.
After full repayment:
-
The debt is removed.
-
The position is closed.
-
The remaining collateral is returned to the owner.
Because feUSD debt has no fixed maturity date, users control when repayment occurs. However, allowing a position to run indefinitely means accepting continued interest, liquidation monitoring and possible redemptions.
Minimum Debt and Zombie Positions
Felix Protocol may enforce a minimum feUSD debt size per position.
The purpose is to keep liquidations and redemptions economically viable. Very small positions can cost more to process than the value captured by the transaction.
A position whose debt falls below the system minimum after a redemption can become a “zombie position.”
Such a position may no longer support normal adjustments. The user may need to repay the remaining balance fully and close it.
Minimum debt parameters can change, so users should verify the live interface before opening or partially repaying a Felix CDP.
This is especially important for smaller borrowers. A partial repayment that appears reasonable could leave the position below the operational threshold.
Practical Uses for Minted feUSD
A borrower can use feUSD in several ways.
Hold Dollar-Denominated Liquidity
The user can retain feUSD as available on-chain capital.
Trade Other Assets
feUSD can be exchanged for another supported token to adjust portfolio exposure.
Increase Leverage
A user may buy more of the original collateral asset, although this creates a leveraged loop and materially increases risk.
Enter a Stability Pool
feUSD can be deposited into a Felix Stability Pool Vault, but using borrowed feUSD this way adds strategic complexity.
Provide Liquidity
Users may deploy feUSD into compatible trading pools, accepting market and impermanent-loss risk.
Cover Short-Term Capital Needs
A long-term holder can access liquidity without immediately selling the collateral.
The most responsible use case has a defined purpose and repayment plan.
Key Benefits of Felix CDP
Liquidity Without an Immediate Sale
Users can mint feUSD while maintaining exposure to approved collateral.
Flexible Loan Duration
There is no fixed maturity while the position remains sufficiently collateralized.
User-Selected Cost of Capital
Borrowers choose their annual interest rate.
Transparent On-Chain Accounting
Collateral, debt and position health can be monitored through smart contract data.
Capital Efficiency
Stability Pool-backed liquidations can support efficient borrowing parameters.
Permissionless Position Management
Users can add collateral, repay debt, borrow more or close positions through on-chain transactions.
Native feUSD Creation
The CDP system creates dollar-denominated liquidity for the wider Felix Protocol and Hyperliquid ecosystem.
Main Felix CDP Risks
Liquidation Risk
Collateral can be lost when the position crosses its liquidation threshold.
Redemption Risk
Low-interest-rate positions may lose collateral exposure even while healthy.
Collateral Volatility
Approved assets can decline rapidly.
Interest Cost
Debt grows over time and gradually weakens the collateral ratio.
Smart Contract Risk
A software vulnerability could affect collateral or debt accounting.
Oracle Risk
Incorrect or delayed prices can influence position health and liquidation.
feUSD Peg Risk
The borrowed synthetic dollar may trade above or below one dollar.
Liquidity Risk
Obtaining feUSD for repayment or selling collateral gains may become more expensive during market stress.
Best Practices for Managing a Felix CDP
Use a conservative collateral ratio from the beginning.
Set the interest rate after reviewing the current market median and redemption conditions.
Keep some feUSD or other liquid capital available for emergency repayment.
Monitor collateral prices, debt growth and position health regularly.
Add collateral or repay debt before the account becomes critical.
Avoid using all minted feUSD to buy more of the same collateral unless the leverage risk is fully understood.
Account for rate-adjustment fees before changing the borrower-selected interest rate.
Know the current minimum debt requirement and avoid accidentally creating an unmanageable small position.
Most importantly, plan the repayment source before minting feUSD.
FAQ
What is a Felix CDP?
A Felix CDP is an overcollateralized debt position where a user deposits an approved crypto asset and mints feUSD against its value.
How is feUSD created?
feUSD is minted as debt when a borrower deposits approved collateral into Felix Protocol and opens a CDP position.
Does a Felix CDP have a repayment deadline?
No fixed maturity applies. The position can remain open while it stays above the liquidation threshold and the borrower continues accepting interest and redemption risk.
What causes a Felix CDP liquidation?
Liquidation can occur when collateral value becomes too low relative to debt because of price declines, interest accrual, additional borrowing or collateral withdrawal.
Why do Felix borrowers choose their own interest rate?
The selected rate determines borrowing cost and redemption priority. Lower-rate positions generally face redemptions first.
How can a borrower improve the collateral ratio?
The user can add more collateral or repay part of the feUSD debt.
How is a Felix CDP closed?
The borrower repays the full outstanding feUSD debt and applicable accrued costs, after which the remaining collateral is returned.
Conclusion
Felix CDP turns approved crypto assets into collateral for minting feUSD.
The process follows a transparent structure: deposit collateral, choose a borrowing amount, set an interest rate, receive feUSD and manage the resulting debt position.
This gives HYPE holders and other eligible users access to dollar-denominated liquidity without requiring an immediate sale of their assets.
The flexibility comes with active responsibilities.
The borrower must maintain sufficient collateral, monitor interest growth and understand that low-rate positions are more exposed to feUSD redemptions. If the collateral ratio falls below the required threshold, the Felix CDP can be liquidated automatically.
Repayment has no fixed deadline, but an open-ended loan is not costless. Interest continues accumulating, and market volatility can change position health quickly.
A well-managed Felix CDP begins with a conservative borrowing amount. It maintains liquid reserves for repayment, uses an interest rate appropriate for the intended holding period and avoids relying on last-minute collateral adjustments.
Before minting feUSD, review the live collateral parameters, minimum debt, selected rate and projected liquidation threshold. Calculate how the position would behave after a severe collateral decline rather than only under current conditions.
Start with a manageable position and use feUSD for a defined financial purpose. Add collateral or repay debt early when the safety buffer declines.
Felix Protocol CDPs can provide flexible, on-chain access to stable liquidity. Their long-term value for a borrower depends not on maximizing LTV, but on controlling debt and preserving collateral through changing market conditions.