Sonic Labs has launched USSD, a USD-pegged stablecoin built on Frax Finance's white-label infrastructure and collateralized by tokenized U.S. Treasury products from BlackRock, WisdomTree, and Superstate. The launch, announced as of early March 2026, positions USSD as the primary stable liquidity layer for the Sonic blockchain and marks the conclusion of a year-long, publicly turbulent search for a workable stablecoin strategy.

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Institutional Collateral at the Core

The decision to anchor USSD with real-world assets, meaning tokenized U.S. Treasury products and money market instruments, reflects a path the team arrived at after multiple strategy pivots throughout 2025. BlackRock's BUIDL fund, one of three collateral providers, holds approximately $2.38 billion in assets under management and accounts for roughly 32% of the total tokenized Treasury market. WisdomTree's WTGXX holds more than $700 million in tokenized Treasury assets and received SEC approval for 24/7 trading in February 2026. Superstate's USTB adds another $800 million in tokenized money market assets to the pool. Total tokenized U.S. Treasuries now exceed $10 billion in circulation as of early 2026, up from $7.3 billion in 2025.

USSD uses LayerZero's Omnichain Fungible Token (OFT) standard, a cross-chain protocol that lets users mint the stablecoin from more than 10 blockchain networks directly to Sonic. LayerZero's OFT standard is currently used by 14 of 55 stablecoin issuers with market caps above $50 million, including Tether's USDT0, Ethena, and PayPal. Users can also mint and redeem USSD against Circle's USDC through Chainlink's Cross-Chain Transfer Protocol on any supported chain, creating an on-ramp and off-ramp to one of the most widely distributed stablecoins in DeFi.

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A Third Attempt After Public Setbacks

USSD is the third iteration of Sonic's stablecoin ambitions, arriving after a well-documented strategy collapse in 2025. In March of that year, CTO Andre Cronje, a prominent figure in DeFi, hinted at an algorithmic stablecoin targeting yields above 23% at $100 million in total value locked (TVL). The proposal drew swift backlash, given its resemblance to the Terra/UST model that imploded in 2022 and triggered one of crypto's most severe market events. Cronje acknowledged the sensitivity in a post on X: "Pretty sure our team cracked algo stablecoins today, but the previous cycle gave me so much PTSD, not sure if we should implement it."

Within a week, Sonic reversed course. Cronje announced: "We will no longer be releasing a USD-based algorithmic stablecoin...we will be releasing a mathematically bound numerical Dirham, which is settled and denominated in USD." That UAE dirham concept also never shipped, making USSD the final product of an extended and public strategy debate.

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Frax's White-Label Infrastructure and Compliance Framing

The backbone of USSD comes from Frax Finance's frxUSD white-label service, which lets partner networks deploy branded stablecoins using Frax's compliance-ready backend. Frax designed the system to meet requirements under the GENIUS Act, U.S. legislation governing stablecoin issuance that Frax founder Sam Kazemian reportedly helped shape. Frax launched frxUSD as a GENIUS Act-compliant stablecoin in February 2025, and USSD is among the first network-level deployments of the white-label product. Kazemian had publicly signaled the Frax-Sonic alignment before the deal was formalized, writing in an early post that predates Sonic's rebrand: "Looking forward to having @fraxfinance issue native Frax Assets on @FantomFDN's Sonic!" FantomFDN was the handle for Sonic's predecessor chain, Fantom.

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Sonic's On-Chain Context

Sonic, a rebranded and rebuilt successor to the Fantom blockchain operating as an independent EVM-compatible Layer 1 chain, reached a peak TVL of approximately $2.14 billion in early 2025 before broader market contractions reduced that figure. The network's native S token carries a market cap of roughly $149 million as of early March 2026. Sonic distributes up to 90% of transaction fees back to application developers through its Fee Monetization (FeeM) model, a structure uncommon among competing Layer 1 networks. USSD fits into a stated 2026 strategy to vertically integrate core financial infrastructure, including trading, lending, liquidity, stablecoin, and staking infrastructure layers, either through internal development or acquisitions.

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Regional Implications for Africa and South Asia

For users in Sub-Saharan Africa and South Asia, the architecture behind USSD carries practical relevance. Stablecoins represent 43% of all crypto transactions in Sub-Saharan Africa, with Nigeria, Kenya, Ethiopia, and South Africa leading adoption for remittances and inflation protection. Kenya ranks fifth globally for transactional stablecoin use, Ethiopia recorded retail stablecoin growth of more than 180% year over year, South Africa leads the region in institutional stablecoin transactions, and Nigeria accounts for approximately 40% of regional stablecoin inflows. A stablecoin that converts freely to USDC and mints across multiple chains reduces friction for African users already routing capital through existing USDC on-ramps. USDC has emerged as the preferred institutional stablecoin gaining traction in the region after USDT, making its convertibility a particularly meaningful feature for that market.

In South Asia, where India ranks first in the Chainalysis 2025 Global Crypto Adoption Index, Pakistan ranks third, and Bangladesh ranks fourteenth, RWA-backed stablecoins with named institutional collateral address a counterparty risk concern that has kept some users away from DeFi. The region recorded an approximately 80% surge in crypto transaction volumes, reaching around $300 billion between January and July 2025 compared to the same period in 2024. Sonic's developer fee-sharing model provides an added incentive for the large and growing South Asian Web3 developer community, particularly in India, to build payment or remittance applications on the network.

Regulatory headwinds remain a relevant factor. A February 2026 Project Syndicate analysis warned that expanding dollar-denominated stablecoins into emerging markets raises dollarization risks, specifically the risk that central banks lose monetary policy control as local users shift savings into USD-pegged instruments. Analysts have flagged regulatory headwinds across these markets, where central banks including India's Reserve Bank of India and Nigeria's Central Bank have broader concerns about monetary sovereignty. Whether USSD's institutional collateral base softens or sharpens those concerns will depend largely on how quickly the stablecoin gains traction within DeFi corridors connected to those markets.