> For the complete documentation index, see [llms.txt](https://docs.usd8.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.usd8.ai/products/stake-susd8.md).

# Stake: sUSD8

sUSD8 is an ERC-4626 staking vault over USD8. Yield arrives daily, vests over 8 hours, and compounds into the NAV — nothing to claim.

Staking is how USD8 earns. Deposit USD8 into the staking vault and receive **sUSD8** — a standard **ERC-4626** vault share whose value in USD8 rises with every daily yield distribution.

## How yield reaches you

```mermaid
sequenceDiagram
    participant AM as Asset management
    participant P as Proposer
    participant A as Approver
    participant D as Rewards distributor
    participant V as sUSD8 vault

    AM->>P: Daily return confirmed
    P->>D: Propose the day's yield
    Note over P,A: Same person cannot do both
    A->>D: Approve
    D->>V: Mint and deliver USD8
    Note over V: 8-hour linear vesting
    V-->>V: NAV of each share rises
```

1. Every day, confirmed returns from the protocol's reserves are **proposed** on-chain by one authorized signer and **approved** by a second — the same person can never do both.
2. On approval, the distributor mints the day's yield in USD8 and delivers it to the staking vault.
3. The new yield **vests linearly over 8 hours** into the vault's total assets. This smooths the NAV curve and makes it pointless to snipe deposits around distribution time.

The result: the **NAV** — the USD8 value of each sUSD8 share — rises daily. Your share count never changes; the value of each share does. **There is nothing to claim, ever.**

{% hint style="success" %}
**Example.** You stake 10,000 USD8 at a NAV of 1.0000 and receive 10,000 sUSD8. Some months later the NAV reads 1.0400 — your position is now worth 10,400 USD8. Unstake at any time to realize it, or keep compounding.
{% endhint %}

## Unstaking

Unstaking converts sUSD8 back to USD8 at the current NAV.

* **Current configuration: instant.** Standard ERC-4626 withdrawals are enabled — no waiting period.
* **Cooldown mode (dormant).** The vault also implements a cooldown mechanism (funds rest in an isolated silo contract during the countdown) that governance can enable as a protective measure in stressed conditions. If ever activated, the change is visible on-chain and will be announced.

{% hint style="info" %}
**Deposits can be paused in an emergency — withdrawals cannot.** The exit path from sUSD8 to USD8 is intentionally unpausable: no key, including the protocol's own, can trap staked funds in the vault.
{% endhint %}

## Want more than base yield?

Lock your sUSD8 for a fixed term and earn a boost multiplier of up to **1.50×** on top — see [Lock: Term Certificates](/products/lock-terms.md).