Tokenized Treasury Tokens: How TBILL, STBT, and USYC Work

OpenEden, Matrixdock, and Hashnote issue tokenized treasury tokens that earn US T-bill yield on-chain, with the market reaching $11.70 billion in March 2026.

Introduction

Tokenised treasury platforms convert US Treasury bills (T-bills) and money market instruments into blockchain tokens. These platforms enable crypto investors to earn yield from traditional government securities without leaving the blockchain ecosystem. The tokens represent proportional ownership of the underlying assets, which generate interest benchmarked to the short-term risk-free rate.

OpenEden, Matrixdock, and Hashnote emerged as institutional-grade challengers in this market. Each platform structures its primary token — TBILL, STBT, or USYC — differently in terms of backing assets, smart contract standards, and yield mechanisms. OpenEden offers a dual-product architecture with TBILL and the yield-bearing stablecoin USDO. Matrixdock emphasises transparency through Chainlink Proof of Reserve. Hashnote's USYC saw rapid growth through DeFi integration before Circle's acquisition in January 2025.

This article examines the three platforms across token structure, regulation, DeFi composability, use cases, and risks. The analysis draws on official documentation, regulatory filings, and market data to compare mechanisms and highlight distinctions. Investors gain a clear understanding of how each platform fits within the broader tokenised treasury landscape.

What Are Tokenized Treasury Platforms and Why Do They Matter in Crypto Markets?

Tokenized treasury platforms are blockchain-based systems that convert traditional off-chain assets — primarily US Treasury bills (T-bills), reverse repurchase agreements, and money market instruments — into digital tokens on a public or permissioned blockchain. Each token represents a proportional ownership claim over the underlying asset, allowing investors to hold and transfer that claim on-chain without interacting with traditional financial infrastructure. The yield from the underlying T-bills or repos accrues directly to token holders, benchmarked to the prevailing risk-free rate.

Crypto-native investors and decentralised finance (DeFi) protocols traditionally held idle capital in stablecoins that earned no yield. Tokenized treasury platforms solve this problem by converting US government securities — among the safest yield-bearing instruments in traditional finance — into on-chain tokens that DeFi protocols can read, hold, and compose with. The risk-free rate, defined here as the interest rate on short-duration US Treasury obligations, serves as the yield benchmark for all three platforms covered in this article.

The market for tokenised real-world assets (RWA) — off-chain assets represented as blockchain tokens — accelerated sharply after March 2024, when BlackRock launched its BUIDL fund and Franklin Templeton expanded its BENJI tokenised money market fund. These incumbents drew institutional attention and prompted a wave of specialist challengers. OpenEden, Matrixdock, and Hashnote each entered this market with distinct token structures, regulatory frameworks, and DeFi integration strategies. This article compares the three platforms across all four dimensions.

How Do OpenEden, Matrixdock, and Hashnote Structure Their Treasury Tokens Differently?

Each of the three platforms converts US Treasury exposure into a distinct on-chain token, but the construction of each token — its backing asset, smart contract standard, and yield mechanism — differs in important ways. OpenEden's TBILL token uses an ERC-4626-compliant vault smart contract, where each token is backed 1:1 by short-dated US T-bills held in segregated accounts. Matrixdock's STBT follows the ERC-1400 security token standard on Ethereum, backed by a portfolio of short-term US T-bills and overnight reverse repurchase agreements (repos) collateralised by Treasuries. Hashnote's USYC represents shares in the Hashnote International Short Duration Yield Fund Ltd. (SDYF), which invests in short-term T-bills and performs repo and reverse-repo activity; after Circle's January 2025 acquisition, the token operates under a permissioned ERC-20 contract.

The yield distribution mechanism is one of the sharpest distinctions between the three tokens. TBILL yield accrues to the token's net asset value (NAV) rather than to wallet balances — the token price rises over time, reflecting accumulated interest. STBT uses a daily rebase mechanism: the smart contract automatically increases the token balance in each holder's wallet each business day to reflect the T-bill yield, keeping a constant peg of US$1 per token. USYC uses a price-appreciation model similar to TBILL, where the USYC token price rises to reflect the accumulated short-term risk-free rate return.

_{Data: March 2026}

Custody and structural safety also differ across the three platforms. OpenEden appointed BNY Mellon as investment manager and custodian in August 2025, providing segregated custody under a major global bank. STBT assets are managed through Matrixport's regulated custody infrastructure, with the ERC-1400 standard enforcing a whitelist that restricts transfers to KYC-approved wallet addresses. USYC holders benefit from segregated prime brokerage accounts and an external audit of the ERC-20 contract, with the underlying SDYF fund licensed by the Cayman Islands Monetary Authority (CIMA). All three tokens restrict minting and redemption to accredited or institutional investors who have completed identity verification.

What Is OpenEden and How Does Its Dual-Product Architecture Generate Yield?

OpenEden, founded in 2022 and headquartered in Bermuda, operates two linked on-chain products: the TBILL vault and the USDO stablecoin. The TBILL vault is an ERC-4626-compliant smart contract that holds short-dated US Treasury bills and issues TBILL tokens, each representing proportional ownership of the underlying T-bill portfolio. Yield accrues through NAV appreciation — the token price rises daily as the underlying T-bills generate interest, rather than distributing cash to wallets. BNY Mellon took over as investment manager and custodian of the TBILL fund in August 2025, adding institutional-grade segregated custody.

USDO — branded OpenDollar — is OpenEden's second product: a regulated, yield-bearing stablecoin pegged 1:1 to the US dollar and fully collateralised by TBILL tokens. The Bermuda Monetary Authority (BMA) prudentially regulates USDO, and OpenEden issues it through a Segregated Account Company (SAC), a bankruptcy-remote legal structure that ring-fences holder assets. USDO rebases daily, distributing US Treasury yield directly to stablecoin holders' wallets — a mechanism that distinguishes it from non-yielding stablecoins such as USDC or USDT. For DeFi composability, USDO can be wrapped into cUSDO, an ERC-4626-compliant token that reflects yield through price appreciation instead of rebasing.

In December 2025, OpenEden closed a strategic funding round backed by Ripple, Lightspeed Faction, Anchorage Digital Ventures, FalconX, and others. The capital is earmarked to expand OpenEden's tokenisation-as-a-service infrastructure and to scale both USDO and TBILL distribution globally. OpenEden also maintains a governance token structure — EDEN and its staked counterpart xEDEN — though the platform's primary revenue and product focus remains the regulated yield products.

How Does OpenEden's TBILL Vault Use Smart Contracts to Manage Investor Access?

The TBILL vault enforces investor eligibility at the smart contract level before any token minting occurs. Each prospective investor must complete identity verification and KYC/AML (Know Your Customer / Anti-Money Laundering) screening; only wallet addresses that pass this process are added to an on-chain whitelist. The ERC-4626 standard — a technical specification that defines a common interface for yield-bearing vaults — then handles all deposit, withdrawal, and yield accounting functions in a transparent, auditable format that other DeFi protocols can read and integrate. This combination of compliance-layer access control and open vault accounting allows OpenEden to serve accredited institutional investors while keeping TBILL composable within the broader DeFi ecosystem.

What Regulatory Frameworks Govern OpenEden, Matrixdock, and Hashnote?

Each platform operates under a distinct regulatory jurisdiction, which determines which investors can access the product and under what legal protections. OpenEden holds a Class F Digital Asset Business (DABA) licence issued by the Bermuda Monetary Authority (BMA) — the top-tier DABA licence that permits a full regulated digital asset business operating in or from Bermuda. The TBILL fund itself is structured as a BVI (British Virgin Islands) open-ended professional fund, regulated by the BVI Financial Services Commission (FSC) under the Securities and Investment Business Act (SIBA). USDO, OpenEden's yield-bearing stablecoin, falls under BMA prudential supervision as a segregated accounts structure.

Matrixdock, founded in Singapore in early 2023, distributes STBT under the Monetary Authority of Singapore (MAS) regulatory framework. STBT issuance relies on Section 275 of Singapore's Securities and Futures Act, which exempts offers of securities to institutional and accredited investors from the standard prospectus requirement. Matrixdock listed STBT on InvestaX in January 2024 — a tokenisation platform licensed by MAS — making it the first Asia-Pacific tokenised short-term Treasury bill product distributed through a MAS-licensed channel.

Hashnote's regulatory position changed materially after Circle announced its acquisition on 21 January 2025. Before the acquisition, Hashnote's USYC was issued through the Hashnote International Short Duration Yield Fund Ltd., a Cayman Islands fund regulated by CIMA. Post-acquisition, USYC operates within Circle's US regulatory perimeter, and DRW's institutional trading subsidiary Cumberland became a strategic partner to provide USYC and USDC liquidity. All three platforms restrict access strictly to accredited or institutional investors who have completed KYC/AML verification; retail investors in all jurisdictions are currently excluded.

_{Data: March 2026}

What Is Matrixdock and How Does Its STBT Token Differ From Competitors?

Matrixdock was founded in February 2023 by Matrixport, a Singapore-based digital asset financial services group, as the first Asia-based platform to issue a tokenised short-term Treasury bill product. Its primary token, STBT (Short-Term Treasury Bill Token), is backed 1:1 to the US dollar by a portfolio of short-dated US T-bills and overnight reverse repurchase agreements collateralised by Treasuries. In 2023, STBT received the "Ecosystem Excellence" award at the 4th Annual TADS Awards — the leading international awards for the Tokenised Assets and Digitised Securities sector. Matrixdock listed STBT on InvestaX, a MAS-licensed tokenisation platform, in January 2024, cementing its Asia-Pacific distribution footprint.

A key competitive differentiator for Matrixdock is its transparency infrastructure, powered by Chainlink. The platform became the first tokenised RWA issuer to go fully all-in on Chainlink's RWA infrastructure stack in May 2024, integrating both Chainlink Proof of Reserve and Chainlink CCIP (Cross-Chain Interoperability Protocol). Proof of Reserve uses Chainlink oracle nodes to publish verified, on-chain attestations of the off-chain T-bill holdings backing STBT, providing continuous automated verification rather than periodic manual audits. CCIP then enables the secure cross-chain transfer of Matrixdock's tokenised assets using a burn-and-mint mechanism, eliminating the need for third-party bridges and their associated security risks.

Matrixdock's wrapped token, wSTBT, extends composability further by allowing STBT to participate in DeFi liquidity pools. wSTBT is deployed in STBT/3CRV liquidity pools on Curve Finance, enabling institutional holders to earn additional trading fee yield on top of the underlying T-bill return. Matrixdock's multi-asset strategy expanded in 2024 with the launch of XAUm, a tokenised gold product backed by 99.99%-purity LBMA-accredited gold stored in vaults in Singapore and Hong Kong. In February 2026, Matrixdock expanded XAUm to Solana, citing the network's high throughput, low latency, and minimal transaction costs as suited to institutional RWA deployment at scale.

How Does Matrixdock Use Chainlink Proof of Reserve to Verify Backing Assets?

Chainlink Proof of Reserve (PoR) is an automated on-chain verification system that uses decentralised oracle networks to confirm that a tokenised asset is fully backed by its stated off-chain holdings. For STBT, Chainlink oracle nodes query the custodian's T-bill holdings data at regular intervals and publish the result as a tamper-resistant on-chain data feed. Smart contracts can then read this feed directly — confirming 1:1 backing before processing any mint or transfer request.

This mechanism addresses the core trust problem in tokenised asset markets: the gap between what an issuer claims is held off-chain and what can be independently verified on-chain. Traditional audits provide point-in-time snapshots, typically once per quarter, whereas Chainlink PoR operates continuously and publishes results publicly on the blockchain. Any discrepancy between on-chain token supply and verified off-chain backing becomes immediately visible to any market participant — reducing counterparty risk for DeFi protocols that use STBT or wSTBT as collateral.

_{Source: Matrixdock / Chainlink integration documentation, 2024}

How Do These Three Tokenized Treasury Platforms Integrate with DeFi Protocols?

DeFi composability — the ability of one protocol to use another protocol's token as an input — is a central competitive advantage for all three tokenised treasury platforms. Matrixdock deploys composability through wSTBT, a wrapped version of STBT that is compatible with DeFi liquidity pools. wSTBT is available in STBT/3CRV liquidity pools on Curve Finance, where institutional holders can earn additional trading fee yield on top of the base T-bill return. Cross-chain transfers of STBT and other Matrixdock tokens use Chainlink CCIP, eliminating the need for third-party bridges that introduce smart contract risk.

OpenEden's TBILL integrates with DeFi through two complementary mechanisms. First, the ERC-4626 vault standard makes TBILL natively readable by any DeFi protocol that supports the standard, enabling use as lending collateral without custom integration work. Second, cUSDO — the wrapped, non-rebasing form of OpenEden's USDO stablecoin — can be deployed as yield-bearing off-exchange collateral. In July 2025, OpenEden and Ceffu introduced cUSDO as the first yield-bearing collateral accepted on Binance's MirrorRSV platform, allowing institutional traders to earn T-bill yield while simultaneously posting collateral for margin trading.

Hashnote's USYC achieved the most dramatic DeFi-driven AUM growth of the three platforms. The Usual protocol — a DeFi stablecoin project that distributes T-bill yield to holders via its USD0 stablecoin — adopted USYC as its primary backing asset in late 2024. This integration drove USYC's market value from roughly $240 million to over $1.2 billion in three months, allowing it to surpass BlackRock's BUIDL fund as the largest tokenised Treasury product in December 2024. As of March 2026, USYC holds approximately $2.2 billion in supply — the largest of any tokenised Treasury product — with $1.84 billion of that deployed on BNB Chain through a Binance institutional collateral integration launched in July 2024.

_{Data: March 2026}

DeFi composability offers clear yield and liquidity advantages, but it also layers additional risk onto the underlying T-bill exposure. Each DeFi protocol that holds or uses a tokenised treasury token introduces its own smart contract risk — a bug or exploit in the DeFi protocol can put the treasury token at risk even if the issuer's own contracts are secure. The Usual-driven USYC surge also illustrates demand concentration risk: when a single DeFi protocol drives the majority of a token's AUM, a shift in that protocol's collateral policy can trigger rapid outflows. Investors in tokenised treasury tokens deployed within DeFi protocols should account for both the underlying asset risk and the additional composability risk layer.

What Are the Primary Use Cases for Tokenized Treasury Tokens in Institutional Finance?

Tokenised treasury tokens serve four distinct institutional use cases that address structural inefficiencies in traditional capital management. Each use case exploits the programmability and 24/7 availability of on-chain settlement in ways that conventional T-bill investments cannot match.

The four primary use cases are:

• Idle capital yield management. DeFi protocols, DAOs (decentralised autonomous organisations), and crypto-native funds hold large stablecoin reserves that earn no yield in smart contracts. Tokenised treasury tokens allow these entities to earn risk-free T-bill rates on idle capital without exiting the blockchain environment or establishing traditional banking relationships. The logic is direct: a DAO treasury holding $50 million in USDC earns zero return, whereas the same capital deployed into TBILL or USYC earns short-duration US Treasury yield automatically.
• DeFi collateral. Tokenised treasury tokens are increasingly accepted as high-quality collateral in on-chain lending protocols such as Aave and Maple Finance. ERC-4626-compliant tokens like TBILL are natively readable by these protocols, enabling collateralised borrowing against T-bill-backed assets without the counterparty risk of posting volatile crypto assets.
• Cross-border and programmable settlement. Traditional securities settle on a T+1 or T+2 cycle, meaning funds are locked for one to two business days after a trade. Tokenised treasury tokens settle on-chain in minutes, 24 hours a day and seven days a week, removing overnight and weekend settlement gaps for treasury management operations. Smart contracts automate yield distribution, collateral substitution, and redemption without manual processing.
• Yield-bearing stablecoin collateral. Tokenised treasury tokens serve as the backing asset for a new class of yield-bearing stablecoins. OpenEden's USDO is fully collateralised by TBILL tokens, passing T-bill yield through to stablecoin holders via daily rebase. This model extends T-bill yield access to any DeFi user who holds a stablecoin — without requiring direct platform access or a minimum investment threshold.

What Risks and Limitations Should Investors Consider with These Tokenized Treasury Platforms?

Tokenised treasury platforms combine traditional financial infrastructure with smart contract technology, and each layer introduces distinct risks. Investors should evaluate four risk categories before allocating capital to TBILL, STBT, or USYC.

_{Data: March 2026}

Regulatory risk affects all three platforms because each operates under a non-US primary jurisdiction for its token issuance. The Bermuda, Singapore, and Cayman regulatory frameworks are respected but smaller in scope than SEC or FCA oversight. A change in local licensing conditions — or a determination by a major jurisdiction that the tokens constitute unregistered securities — could restrict distribution at short notice. Hashnote faces the most direct US regulatory exposure following its January 2025 integration into Circle's US-regulated structure.

Smart contract risk is compounded when tokenised treasury tokens are deployed inside DeFi protocols. A vulnerability in a third-party lending protocol or liquidity pool that holds TBILL, wSTBT, or USYC as collateral can place those tokens at risk, even if the issuer's own contracts are secure. DeFi composability risks include oracle manipulation, flash-loan attacks on connected protocols, and cascading liquidations across interconnected systems. The IOSCO 2025 tokenisation report highlights that the automation of transaction execution in tokenised asset markets can trigger highly correlated capital movements, amplifying liquidity stress in adverse conditions.

Counterparty and custody risk in tokenised treasury products involves multiple intermediary layers. Between the investor and the underlying T-bill sits at minimum the token issuer, the fund vehicle, and the custodian — and for DeFi-deployed tokens, additional smart contract protocols. Liquidity risk is typically managed through daily redemption windows, but redemptions depend on T-bill market liquidity and operational settlement capacity; stress conditions in government bond markets could delay processing. Investors should read each platform's redemption terms and assess the full intermediary chain before committing capital.

How Has the Tokenized Treasury Market Grown and Where Do These Challengers Fit?

The tokenised treasury market expanded sharply from 2023 onward, driven by rising US interest rates that made T-bill yield attractive to crypto-native capital. The total value of tokenised US Treasuries reached $11.70 billion as of March 2026, according to rwa.xyz data. The broader tokenised real-world asset (RWA) market hit $24.9 billion in January 2026, growing nearly four times over the preceding twelve months. Tokenised US Treasuries remain the single largest category within that total, forming the base layer of institutional on-chain yield infrastructure.

BlackRock's USD Institutional Digital Liquidity Fund (BUIDL), launched in March 2024 on Ethereum in partnership with Securitize, was the watershed moment that validated the institutional tokenised treasury category. BUIDL crossed $500 million in AUM by July 2024 and surpassed $1 billion in March 2025 — the first tokenised fund of any kind to reach that level. As of March 2026, Circle (USYC) holds 20.87% market share of the tokenised treasury market, Securitize (BUIDL) holds 18.08%, and Ondo holds 17.06%, with Franklin Templeton's BENJI at 8.81%.

OpenEden, Matrixdock, and Hashnote occupy distinct niches within this competitive landscape rather than competing head-to-head with the incumbents. Matrixdock and OpenEden remain independent operators as of March 2026, targeting DeFi composability and Asia-Pacific distribution respectively. Hashnote's trajectory diverged most sharply: the Usual protocol's adoption of USYC as its primary USD0 stablecoin collateral in late 2024 caused USYC's market value to surge fivefold in three months to $1.2 billion, briefly overtaking BUIDL in December 2024. Circle then acquired Hashnote on 21 January 2025, absorbing USYC into the world's largest stablecoin issuer's ecosystem and repositioning it as institutional collateral infrastructure rather than a standalone challenger product.

_{Data: March 2026 — rwa.xyz, CCN}

What Role Did the Usual Protocol Play in Hashnote's AUM Surge in Late 2024?

The Usual protocol is a DeFi stablecoin project that issues USD0, a stablecoin fully backed by tokenised real-world assets. In late 2024, Usual adopted USYC as the primary backing asset for USD0, creating direct protocol-level demand for USYC at scale. This single integration drove USYC's AUM from approximately $240 million to over $1.2 billion in roughly three months — a fivefold increase that pushed USYC ahead of BlackRock's BUIDL as the largest tokenised Treasury product in December 2024.

The episode illustrates both the power and the fragility of DeFi composability as a growth mechanism. A single protocol's collateral decision can generate AUM growth that would take years to achieve through conventional institutional distribution. However, AUM concentrated in one DeFi protocol creates demand concentration risk: when Usual began diversifying its reserves in late 2024, USYC's market share contracted. The Usual-USYC relationship remains the clearest case study in how tokenised treasury tokens can function as critical infrastructure within DeFi stablecoin architectures — and why that dependency cuts both ways.

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