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Sonic Labs Launches USSD, a native stablecoin backed by U.S. Treasuries & built on Frax to power liquidity across Sonic ecosystem.
Author: Akshat Thakur
March 10, 2026 — Sonic Labs Launches USSD, a network-native USD stablecoin designed to become the core liquidity layer of the Sonic ecosystem. The new stablecoin is built on infrastructure from Frax Finance and backed 1:1 by U.S. Treasury bills managed by major institutions including BlackRock, Superstate, and WisdomTree. The launch introduces a permissionless stablecoin with zero minting fees and cross-chain compatibility, positioning USSD as a central component of Sonic’s expanding DeFi ecosystem.
High Signal Summary For A Quick Glance
mg.sonic
@0xmg_sonic
@SonicLabs @fraxfinance “Yield designed to flow back into the ecosystem. Supports buybacks and ecosystem incentives” 👍🏻 Vertical Integration! Hopefully we can scale this to a meaningful level to bring the real impact to $S.
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 https://t.co/4S0RZQQanm
02:14 PM·Mar 9, 2026
LmouL
@lmoul_
@SonicLabs @fraxfinance The yield goes to $S buybacks ? 👀
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 https://t.co/4S0RZQQanm
02:12 PM·Mar 9, 2026
0xCB
@_0xCB_
@SonicLabs @fraxfinance Development never stops 🤜🤛 A new piece added to complete the puzzle ⛓️
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 https://t.co/4S0RZQQanm
02:02 PM·Mar 9, 2026
Steady attention without excessive speculation.
Sonic Labs previously operated as the Fantom Foundation before rebranding in late 2025 as part of a broader network upgrade. The original Fantom blockchain launched in 2019 and became known for its Directed Acyclic Graph architecture and the Lachesis consensus mechanism.
The network focused on delivering fast transaction speeds and low costs for decentralized finance applications. With the Sonic rebrand, the project shifted toward a vertically integrated blockchain ecosystem that combines infrastructure, developer tools, and financial primitives.
The Sonic network now centers around the $S token, which powers gas fees and governance across the ecosystem. The platform also launched initiatives such as ecosystem funding programs and cross-chain integrations to attract developers and liquidity.
Sonic Labs Launches USSD as a native stablecoin designed to support decentralized finance activity across the Sonic network.
Unlike externally issued stablecoins that rely on third-party infrastructure, USSD is designed as a core protocol component. The stablecoin will provide consistent liquidity for decentralized exchanges, lending platforms, gaming applications, and other on-chain services.
The launch forms part of Sonic’s broader strategy of vertical integration, where key financial services are built directly within the network rather than relying on external providers.
The USSD stablecoin uses infrastructure developed by Frax Finance, a protocol known for its work in stablecoin design and DeFi integrations.
Frax was founded in 2021 and introduced the FRAX stablecoin along with other products such as frxUSD. The platform manages billions in digital assets and has become widely integrated across decentralized finance ecosystems.
By using Frax’s infrastructure, Sonic aims to benefit from existing stablecoin architecture while tailoring the system specifically for its own network.
USSD is backed one-to-one by U.S. Treasury bills managed by several financial institutions.
These include:
Treasury-backed reserves provide a yield-generating base for the stablecoin while maintaining price stability around the U.S. dollar.
The Sonic ecosystem will receive the yield generated from these reserves to support network incentives and tokenomics.
The USSD stablecoin introduces several features designed to encourage adoption across the Sonic ecosystem.
Key characteristics include:
These features aim to make USSD a low-cost and widely usable liquidity asset within decentralized applications.
Users can mint USSD by depositing supported collateral such as USDC or other approved assets. Once minted, the stablecoin can be used across decentralized applications on the Sonic network.
The reserves backing USSD generate yield through Treasury holdings. That yield is redirected toward ecosystem incentives, including buybacks of the $S token and other growth initiatives. Cross-chain integrations will allow USSD to move between blockchain ecosystems through bridges and interoperability solutions.
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