How saUSD works

Core Positioning

saUSD represents the yield-bearing layer of the Sumplus ecosystem. Unlike aUSD, which functions as a liquid proof-of-reserve stablecoin, saUSD is designed to mirror the experience of a traditional interest-bearing bank deposit. By simply holding saUSD, users continuously accrue returns, making it a crypto-native alternative to savings accounts in the fiat world.

Source of saUSD

saUSD can only be obtained by staking aUSD into the protocol. When users deposit aUSD into the staking pool, they receive an equivalent amount of saUSD in return. This design ensures that all yield distribution is rooted in verifiable, fully-backed collateral, while allowing users to choose between liquidity (aUSD) and yield (saUSD) at any time.

Mechanism of Appreciation

The value of saUSD grows over time as the aggregate yield from all underlying assets is funneled into the aUSD staking pool. This yield is distributed proportionally among saUSD holders, causing the token itself to continuously appreciate against aUSD. In practice, 1 saUSD will gradually become redeemable for more than 1 aUSD as returns accumulate.

Use Cases

Sumplus is actively building multiple scenarios for saUSD adoption. Beyond being a simple yield-bearing asset, saUSD can be used for payments, savings, and storage, with integrations across the Sumplus ecosystem. Importantly, we are also engaging with regulated banking partners to extend the utility of saUSD into the traditional financial system, offering users a safer and more seamless bridge between crypto and banking.

Liquidity & Convertibility

To ensure flexibility, Sumplus will establish deep liquidity pools between saUSD and aUSD. This allows users to easily convert back to aUSD whenever liquidity is needed, while maintaining efficient price discovery and minimizing slippage. saUSD is therefore both yield-generating and liquid, combining the best aspects of DeFi composability and TradFi usability.

Future Extensions

Over time, saUSD will expand beyond its role as a yield-bearing stablecoin. It is expected to serve as collateral in lending protocols, a settlement unit in agent-to-agent networks, and a stable medium of exchange in onchain and offchain commerce. The protocol’s roadmap also includes developing tools for merchants and institutions to adopt saUSD natively, driving broader utility and adoption.