Sonic Labs has launched USSD, a new USD-pegged stablecoin designed to be the native dollar of the Sonic blockchain and to bring institutional-grade Treasury liquidity on-chain.
Announced March 9, USSD is backed 1:1 by tokenized U.S. Treasury assets held with regulated custodians. The reserve mix includes Treasury products tied to major firms such as BlackRock, Superstate and WisdomTree, and Sonic says the governance and redemption mechanics mirror the transparency-first framework used by Frax (FRAX).
What USSD does
- A network-native stablecoin for trading, lending, payments and settlement across Sonic’s DeFi stack.
- Mintable via non-custodial smart contracts on Sonic: supported dollar assets can be deposited at a one-to-one ratio and the minting process is fee-free.
- Built on Frax Finance’s infrastructure, which Sonic is using for cross-chain minting and redemption.
Cross-chain liquidity and usability
USSD launches with cross-chain minting support from more than ten blockchains. Users can deposit assets on another chain and receive USSD on Sonic, enabling liquidity to flow into the Sonic ecosystem without lengthy bridges or fragmented settlement. Via Frax’s cross-chain rails, USSD can also be exchanged back into supported dollar assets for on- and off-ramp flexibility.
Why it matters
Stablecoins are the plumbing of DeFi—used as trading pairs, collateral and settlement rails. A native, institutionally backed USD token can help keep liquidity and transaction volume inside Sonic while offering a consistent dollar reference for developers and users. Sonic Labs also notes that revenue from the Treasury assets backing USSD could be reinvested into ecosystem incentives and network development as activity grows.
Bottom line: USSD aims to combine the stability of tokenized Treasury bills with Frax’s cross-chain tooling to provide Sonic with a robust, on-chain dollar designed to attract liquidity and simplify DeFi operations across multiple networks.
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