> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stratareserve.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Money — srUSD

> Strata's commodity-backed settlement dollar and the control plane for supply.

The **Money** engine issues **srUSD**, Strata's stable digital settlement unit,
and serves as the control plane that gates supply across the whole system. It is
a fork of **Liquity v1**, extended with a global money-policy controller.

## The instruments

<Tabs>
  <Tab title="srUSD">
    * Collateralized digital dollar, backed by tokenized silver reserves
    * **Redeemable 1:1 for USDC on-chain**
    * Non-yield-bearing (deliberately, to avoid securities classification)
    * Not a deposit or liability of any entity
    * Non-redeemable for the underlying collateral — only for USDC
    * **Uses:** settlement, collateral, credit
  </Tab>

  <Tab title="srSILVER">
    * Tokenized representation of vaulted silver
    * Backed by SPV-held reserves (direct silver allocation)
    * **Redeemable for USDC at spot silver value**
    * Non-yield-bearing
    * **Uses:** commodity exposure, DeFi collateral
  </Tab>
</Tabs>

<Info>
  **Launch capacity:** \~$250M srUSD and ~$50M srSILVER.
</Info>

## Why non-yield-bearing

srUSD pays no yield by design. A non-yield-bearing, fully-redeemable settlement
unit avoids being characterized as a security or a deposit, which keeps it usable
as neutral settlement and collateral across every Strata engine.

## The control plane

Every engine that can affect srUSD supply routes through a global money-policy
controller and engine registry, which enforce caps, throttles, and issuance
gating. This is why Money is described as the system's control plane rather than
just a stablecoin.

<Card title="Collateral & peg mechanics" icon="scale-balanced" href="/protocol/collateral-and-peg">
  How srUSD stays redeemable 1:1 and how collateral ratios are set.
</Card>

<Card title="Redeeming srUSD" icon="arrows-rotate" href="/guides/redeeming-srusd">
  The 1:1 USDC redemption path, step by step.
</Card>