USSD launches as Sonic’s native stablecoin, designed to support DeFi liquidity with cross-chain minting.
Sonic Labs has entered the stablecoin market with the launch of USSD, a dollar-pegged asset built for its ecosystem. The token is backed by tokenized U.S. Treasury products from institutions such as BlackRock, Superstate, and WisdomTree. Developers say the stablecoin will serve as the base dollar for trading, lending, and payments on Sonic.
US Sonic Dollar Designed to Strengthen Liquidity Across Sonic DeFi
Sonic Labs has introduced a new dollar-pegged stablecoin designed to anchor liquidity across its network. Named USSD, the asset aims to serve as the main on-chain dollar within the Sonic ecosystem.
Moreover, the token maintains a 1:1 backing with high-quality U.S. dollar assets. Its structure relies on Frax’s GENIUS-compatible frxUSD infrastructure, enabling permissionless interaction via smart contracts.
Introducing USSD, the US Sonic Dollar.
A network-native USD stablecoin built to be the stable liquidity layer across the Sonic ecosystem and a core piece of our vertical integration initiative.
Built on @fraxfinance's infrastructure. Backed 1:1 by U.S. Treasury bills from… pic.twitter.com/4S0RZQQanm
— Sonic (@SonicLabs) March 9, 2026
Stablecoins often act as the main liquidity layer in decentralized finance. Trading pairs, lending markets, and derivatives rely heavily on dollar-based tokens for pricing and collateral. Sonic Labs believes a native dollar asset can more firmly anchor liquidity within its ecosystem.
Without a network-native stablecoin, liquidity often sits in external assets. That fragmentation can reduce trading depth and weaken financial coordination across protocols. Sonic Labs argues that a unified dollar token may support stronger activity across exchanges, lending markets, and treasury operations.
Institutional Treasury Assets Back Sonic’s Stablecoin
The US Sonic Dollar is designed to act like a reliable digital dollar on the Sonic network. Each USSD token is backed 1:1 by safe U.S. dollar assets held by regulated custodians. Most of the reserves are tokenized U.S. Treasury products.
The reserves include assets from major financial firms, including BlackRock’s BUIDL fund, Superstate’s USTB fund, and WisdomTree products. Moreover, more institutions may be added to the reserve pool over time.
In addition, the product’s design focuses on two main ideas. Anyone can freely use the stablecoin via smart contracts, and the reserves remain backed by conservative assets.
Also, users can mint USSD via smart contracts on the Sonic network. By depositing supported dollar assets at 1:1, they receive the same amount of USSD. Sonic Labs does not charge fees for minting the token.
Supported minting assets include major stablecoins and tokenized Treasury instruments. Eligible tokens include USDC, USDT, PYUSD, and USDB. Treasury-backed tokens such as BUIDL, USTB, and WTGXX are also accepted.
USSD Targets Unified Liquidity Across DeFi Markets
US Sonic Dollar allows users to mint stablecoins across multiple blockchains. By depositing supported assets on another network, users can receive USSD directly on Sonic. At launch, minting routes support more than ten different blockchains.
The system is also compatible with cross-chain tools like Circle’s CCTP. This would make transfers between USSD and other major stablecoins easier.
Sonic Labs sees the stablecoin as an important part of its ecosystem. Many DeFi services depend on stable dollar liquidity. These include trading pairs, lending collateral, margin for derivatives, and payments.
A native stablecoin can bring those activities together around one dollar asset. That can reduce liquidity being split across many different stablecoins.
Furthermore, USSD also generates yield from the Treasury assets backing it. Part of that yield may return to the Sonic ecosystem. Funds could support token buybacks or user and developer incentives.
Developers describe USSD as Sonic’s primary dollar asset for DeFi, trading, and payments. The stablecoin is now live on the Sonic network. Users and developers can access it through smart contracts and cross-chain minting routes.
