# FAQ ## Understanding USDN and Its Differences
What Are the Benefits of Holding the USDN token Compared to a Traditional Stablecoin? The USDN token is designed as a decentralized synthetic dollar, meaning it does not rely on physical dollar reserves like traditional stablecoins. It offers potential yields through [funding rates](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#funding-rate) and underlying asset rewards (such as the [wstETH](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#wsteth-wrapped-staked-ether) APR), making it attractive for users looking to generate [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield) while maintaining an exposure to a token that gravitates around the value of 1 dollar.
How Do wUSDN and sUSDN Differ From USDN? ## **wUSDN** **wUSDN (Wrapped USDN)**: Its value gradually increases over time, similar to how [wstETH](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#wsteth-wrapped-staked-ether) appreciates relative to ETH. In contrast, holding [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) results in an increasing balance of USDN tokens over time. In short, wUSDN grows in value, whereas USDN token increases in quantity. * This token is particularly useful for protocols and platforms that do not support USDN’s rebase mechanism, ensuring seamless integration without balance fluctuations.sUSDN ## sUSDN **sUSDN (Seed USDN)**: A transitional token designed to kickstart USDN’s TVL before its official launch. Initially, sUSDN is backed by sUSDe (Ethena’s staked USDe), but over time, the backing will gradually shift from sUSDe to pure USDN token. * The value transition happens seamlessly: if you hold $10,000 worth of sUSDN backed by sUSDe, you will receive the same $10,000 worth of sUSDN backed by USDN token once the transition is complete—regardless of price fluctuations between the tokens. * Users can redeem sUSDN at any time for sUSDe during the transition phase, and later for USDN token once the conversion is finalized. * Longer lock periods are beneficial, as they allow USDN token to be gradually minted and replace sUSDe in a smooth and controlled manner
Is USDN the Next Luna Token?!? No, USDN is fundamentally different from LUNA/UST. LUNA collapsed due to a circular dependency, where UST relied on LUNA for value, and LUNA’s value depended on UST demand. This created an unsustainable loop that collapsed when confidence broke. The USDN token, on the other hand, is backed by real, appreciating assets ([wstETH](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#wsteth-wrapped-staked-ether)) and generates [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield) from [funding rates](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#funding-rate) paid by traders and staking rewards from wstETH, not artificial incentives. Additionally, USDN is fully decentralized and transparent—anyone can verify the collateral and protocol mechanics on-chain. There is no dependency on minting new tokens to maintain its value. The USDN token is not another LUNA. It is a sustainable, collateral-backed synthetic dollar with a clear and transparent yield model.
## Core Mechanics and Functionality
How Does the USDN Rebase Work? The Rebase mechanism allows the [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) to capture the protocol’s [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield) while maintaining its value close to $1. #### **How the Rebase Works** * When the [protocol](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#usdn-protocol) generates yield, USDN’s price gradually increases. * If USDN reaches $1.005, a rebase is triggered, increasing the total supply to bring the price back to $1.0047. * Each holder receives a proportional increase in their USDN balance, reflecting their share of the protocol’s yield #### **No Debase Mechanism** * USDN holders will never see their balance decrease automatically. * If USDN’s price drops below $1, it signals a temporary protocol imbalance. In this case: * [Long](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-position) traders receive incentives (via [funding rates](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#funding-rate)) to open new positions. * USDN holders are incentivized to [redeem](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#redeem), naturally restoring balance. * These mechanisms ensure that the protocol rebalances quickly without significant price drops. #### **Rebases Are Not Fixed or Linear** * Rebases do not occur at set intervals or in fixed steps. Each rebase is influenced by current market conditions and protocol performance. * Displayed APYs are long-term estimates—they should not be applied to short-term USDN holdings, as individual rebases fluctuate based on market dynamics
Where Does the Yield Come From? The [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) generates [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield) from two main sources: 1. **Funding Rates from Traders** – Traders who open [long positions](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-position) on the [protocol’s perpetual](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#perpetual-long-only) pay periodic fees (funding rates) to maintain their positions. These fees are collected and distributed to USDN holders. 2. **Yield from Staked Ethereum (wstETH)** – USDN is backed by [wstETH](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#wsteth-wrapped-staked-ether), which accrues staking rewards over time. As the value of wstETH increases, the [collateral](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#collateral) backing USDN grows, contributing to yield. These mechanisms ensure that the USDN token can generate returns while operating within a decentralized and transparent protocol. For more details, please refer to the [Yields](https://docs.smardex.io/ultimate-synthetic-delta-neutral/the-usdn-protocol/vault-side/yields) section.
Does USDN Yield With Any Wallet? Yes
At What Interval Is the Yield Paid? The ield[#yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield "mention") is continuously distributed in the [USDN Vault](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#vault-side-usdn-side), depending on the elapsed time. This increases the dollar value per [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) over time. When a [rebase](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#rebase) is triggered, it adjusts the price back near $1 by syncing the balance ratios. So, if 1 USDN is worth $1.005 before the rebase, it becomes 1.005 USDN worth $1 after the adjustment (simplified).
Do I Need to Mint USDN token to Benefit From the USDN Yield? No, as long as you hold [USDN tokens](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) in your wallet, you will receive [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield) automatically through the [rebase](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#rebase) mechanism—regardless of whether your USDN tokens come from [minting](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#mint) or the secondary market.
## Usage and Protocol Interactions
Shall I Mint or Swap USDN? The choice between [minting](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#mint) and swapping [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) depends on your priorities: * Swapping works like a standard liquidity pool. It doesn’t require a security deposit, and there is no SDEX fee, but large swaps may result in price [slippage](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#slippage). * Minting increases the total USDN supply. It requires a 0.15 ETH security deposit (refunded) and incurs an SDEX fee, but it generally offers lower slippage, making it more efficient for large amounts. For smaller amounts, swapping is often more convenient. For larger amounts, minting may be the better option.
Why Do I See Different USDN Values? The [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) price displayed on SmarDex.io always reflects the real market price. If you see a different price elsewhere, it means [arbitrage](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#arbitrage) has not yet occurred. This is a normal market behavior and will typically correct over time as traders take advantage of price differences.
Will USDN Be Available on Other Chains? The [USDN token](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) can only be [minted](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#mint) and [redeemed](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#redeem) on Ethereum. However, wUSDN (wrapped USDN) will be available on other chains.
Can I Validate Multiple Pending Actions Simultaneously on the USDN Protocol? The [USDN Protocol](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#usdn-protocol) processes one action at a time, requiring each initiated action to be validated before starting another. This ensures orderly and conflict-free transactions.
## Trading and Position Management
What Should I Know Before Opening a Long on the Perpetual? * A minimum amount of [wstETH](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#wsteth-wrapped-staked-ether) is required to open a [long position](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-position). For details, see the [Minimum Position Size](https://docs.smardex.io/ultimate-synthetic-delta-neutral/long-side/liquidations-and-minimum-position#minimum-position-size) section. * [Funding rates](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#funding-rate) fluctuate—you may earn [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield) if the rate turns negative or pay fees if it remains positive. * In rare cases, closing a long position may be temporarily restricted. Be aware of this possibility—however, when this happens, funding rates become negative, meaning you earn yield instead of paying fees. * [Liquidation](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#liquidation) risks apply—monitor your [collateral](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#collateral) and liquidation price carefully. * High [gas fees](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#gas-fees) on Ethereum make [perpetual longs](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#perpetual-long-only) more suitable for long-term exposure rather than active trading.
Why can't I Mint or Redeem USDN token? ## Mint USDN If you can’t [mint](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#mint) USDN, it’s due to a [protocol](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#usdn-protocol) imbalance between the [vault side](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#vault-side-usdn-side) and the [long side](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-side). To restore balance, more USDN must be redeemed, or more long positions need to be opened. Additionally, make sure you have 0.15 ETH in your wallet as a security deposit (refunded after the transaction), which is required for interacting with the protocol. ## Redeem USDN If you can't [redeem](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#redeem) USDN, it’s due to a protocol imbalance between the vault side and the long side. To restore balance, more USDN needs to be minted, or long positions need to be closed. Additionally, make sure you have 0.15 ETH in your wallet as a security deposit (refunded after the transaction), which is required for interacting with the protocol
Why Can't I Open or Close a Long Position on the Perpetual? ## Open a Long If you can’t open a [long position](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-position) (or use the highest [leverage](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#leverage)), it’s due to a protocol imbalance between the [vault side](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#vault-side-usdn-side) and the [long side](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-side). To restore balance, more [USDN](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token) must be [minted](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#mint), or existing long positions need to be closed. #### You may also lack the minimum required funds: * 0.15 ETH security deposit (refunded after the transaction) * At least 0.65 [wstETH](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#wsteth-wrapped-staked-ether) to open a long For details, see the [Minimum Position Size](https://docs.smardex.io/ultimate-synthetic-delta-neutral/long-side/liquidations-and-minimum-position#minimum-position-size) section. ## Close a Long If you are unable to open a long position, it is due to a protocol imbalance between the [vault side](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#vault-side-usdn-side) and the [long side](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-side). To restore balance, more long positions need to be opened, or more USDN needs to be [redeemed](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#redeem). Additionally, make sure you have 0.15 ETH in your wallet as a security deposit (refunded after the transaction), which is required for interacting with the protocol. #### **⚠ What if I’m stuck in a Long position?** Don’t panic – the [dip accumulator](https://docs.smardex.io/ultimate-synthetic-delta-neutral/the-usdn-protocol/long-side/dip-accumulator) helps rebalance the protocol. While [liquidation](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#liquidation) without the ability to close your position is theoretically possible, the [dip accumulator](https://docs.smardex.io/ultimate-synthetic-delta-neutral/the-usdn-protocol/long-side/dip-accumulator) significantly reduces this risk, making it extremely rare. Blocked longs benefit from high [funding rates](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#funding-rate) → As long as you’re not liquidated, you keep earning lucrative funding rate rewards until closing is available again.
What If I Am Affected by Protocol Restrictions? The [protocol](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#usdn-protocol) may temporarily restrict certain actions to maintain balance. While this may seem concerning, it actually benefits affected users: * If you can’t [redeem](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#redeem) [USDN](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#the-usdn-token): The [funding rate](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#funding-rate) increases, significantly boosting USDN [yield](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#yield). Holding USDN during this period earns high returns. * If your [long position](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#long-position) is locked: The funding rate turns negative, meaning longs earn yield instead of paying fees. #### **What about liquidation risks if I can't close my Long?** The [dip accumulator](https://docs.smardex.io/ultimate-synthetic-delta-neutral/the-usdn-protocol/long-side/dip-accumulator) helps rebalance the protocol and facilitates the unlocking of longs. While [liquidation](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#liquidation) without the ability to close is possible, it is extremely rare due to built-in protections. Reminder: USDN’s [long ETH perpetual](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#perpetual-long-only) is designed for long-term exposure, not frequent short-term trading.
What Is the Difference Between Collateral and Trading Exposure in the USDN Protocol? * **Collateral**: The real portion of a long trader’s position, meaning the part that the user can withdraw. * **Trading Exposure**: The synthetic portion of the exposure resulting from [leverage](https://docs.smardex.io/ultimate-synthetic-delta-neutral/glossary#leverage). It increases potential gains or losses but cannot be directly withdrawn by the trader. Together, these two components form the total exposure.