Sonic’s USSD stablecoin offers permissionless, zero-fee USD access with institutional backing for secure, composable liquidity.
Cross-chain minting and redemption make USSD a flexible dollar for trading, lending, and treasury operations across networks.
Yield from USSD’s backing assets flows back into Sonic, boosting ecosystem growth, buybacks, and on-chain incentives.

Sonic Labs has unveiled USSD, a network-native U.S. dollar stablecoin, aiming to provide the Sonic ecosystem with a dependable and composable liquidity layer. This launch represents a pivotal move to centralize dollar liquidity on Sonic, enhancing DeFi and cross-chain capabilities.

As per the blog post, built on Frax’s GENIUS-compatible frxUSD infrastructure, USSD pairs on-chain flexibility with institutional-grade backing from BlackRock, Superstate, and WisdomTree. Consequently, Sonic users now have permissionless, zero-fee access to a stablecoin that can be minted, redeemed, and moved across more than ten chains.

USSD addresses a key challenge for blockchain networks: predictable and composable liquidity. “Stablecoins are the ‘money layer’ of on-chain finance,” Sonic explained. The network’s native dollar ensures liquidity compounds within Sonic rather than leaking to external markets.

Moreover, USSD underpins Sonic’s vertical integration strategy, connecting trading, lending, payments, and treasury operations through a unified USD primitive. By consolidating liquidity on-chain, Sonic strengthens market efficiency and incentivizes ecosystem growth.

Institutional-Grade Backing and Permissionless Access

USSD is fully backed 1:1 by high-quality, short-duration USD assets. Reserves include tokenized U.S. Treasury products from established institutions like BlackRock (BUIDL), Superstate (USTB), and WisdomTree. This conservative structure combines predictable backing with on-chain composability.

Additionally, minting occurs through non-custodial smart contracts, allowing anyone to deposit supported USD assets, such as USDC, USDT, PYUSD, and receive USSD with zero fees. Hence, both retail and institutional participants can seamlessly access Sonic’s dollar liquidity.

Cross-Chain Flexibility and Ecosystem Yield

Beyond single-chain utility, USSD supports flexible cross-chain minting and redemption. Users can move liquidity efficiently between networks, facilitating settlements, treasury management, and market rebalancing.

Moreover, yield generated from backing assets flows back into the Sonic ecosystem. This feature positions USSD as more than a standard stablecoin; it contributes to buybacks, ecosystem incentives, and sustainable network growth. Sonic emphasized, “A native stablecoin turns liquidity that visits the ecosystem into something that compounds within it.”

The protocol is currently live on Sonic, Ethereum, Base, Arbitrum, and seven others, with more on the way. With its reserves, cross-chain functionality, and free minting fees, USSD has the potential to establish a new paradigm for native stablecoins on a chain.

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