Introduction: Why Put Treasuries on a Blockchain?

US Treasury bills have long been considered one of the safest investments in the world. Now, thanks to tokenization, these traditional financial instruments are migrating on-chain — giving crypto-native investors access to real-world yield without leaving the blockchain ecosystem.

Tokenized US Treasuries represent ownership shares in funds or vehicles that hold actual US government debt. By wrapping these assets as ERC-20 tokens (or equivalents on other chains), issuers allow holders to earn Treasury yields — typically between 4-5% APY as of early 2025 — while maintaining the composability and programmability of blockchain-based assets.

This is one of the most significant real-world asset (RWA) developments in Web3, and BlackRock's BUIDL fund sits at the center of it.

What Is BlackRock BUIDL?

The BlackRock USD Institutional Digital Liquidity Fund (BUIDL) launched in March 2024 on Ethereum, tokenized in partnership with Securitize. It quickly became the largest tokenized Treasury fund by assets under management (AUM), surpassing $500 million within months and crossing $2.5 billion by early 2025.

Key Characteristics of BUIDL

  • Issuer: BlackRock, the world's largest asset manager (~$10 trillion AUM)
  • Tokenization Partner: Securitize (SEC-registered transfer agent and broker-dealer)
  • Blockchain: Initially Ethereum; expanded to Avalanche, Polygon, Arbitrum, Optimism, and Aptos
  • Underlying Assets: Short-term US Treasury bills, repurchase agreements, and cash
  • Token Standard: ERC-20 compatible
  • Minimum Investment: $5 million (institutional only, accredited investors)
  • Yield Distribution: Daily accrual, paid monthly as new tokens or rebase
  • NAV Target: $1.00 per token (stable value)

BUILD represents a watershed moment because it carries the credibility and distribution power of BlackRock, signaling to traditional finance that tokenization is not a fringe experiment.

How Tokenized Treasuries Work

The general architecture involves several layers:

1. Fund Formation: A regulated entity establishes an investment fund that purchases US Treasuries through traditional markets.

2. Tokenization: Shares in that fund are represented as blockchain tokens. A transfer agent (like Securitize) manages the cap table and ensures regulatory compliance.

3. On-Chain Distribution: Investors receive tokens in their wallets. These tokens accrue yield based on the underlying Treasury returns minus fees.

4. Redemption: Investors can redeem tokens for USD (or stablecoins like USDC) through the issuer, typically with T+0 to T+1 settlement.

5. Compliance Layer: KYC/AML is enforced through whitelisting. Only verified wallet addresses can hold and transfer tokens.

Why This Matters for DeFi

Tokenized Treasuries serve as on-chain risk-free rate benchmarks. They can be used as:

  • Collateral in lending protocols (e.g., MakerDAO accepts RWAs)

  • Stable yield sources for DAOs and treasury management
  • Settlement assets that earn yield instead of sitting idle
  • Building blocks for structured products on-chain

The Competitive Landscape

BUILD isn't alone. The tokenized Treasuries market has grown to over $6 billion in total AUM by early 2025. Here are the major players:

Franklin Templeton — BENJI (FOBXX)

  • AUM: ~$700 million+
  • Blockchain: Stellar, Polygon
  • Distinction: One of the earliest institutional tokenized funds (launched 2021). Each share is represented as a token. Franklin Templeton acts as its own transfer agent.
  • Access: Available to retail investors through the Benji app

Ondo Finance — OUSG and USDY

  • AUM: ~$800 million+ combined
  • Blockchain: Ethereum, Solana, Mantle, others
  • OUSG: Tokenized short-term Treasury exposure, institutional
  • USDY: Yield-bearing stablecoin alternative backed by Treasuries, broader access
  • Distinction: Crypto-native issuer that bridges DeFi and TradFi. Strong DeFi integrations.

Hashnote — USYC

  • AUM: ~$1 billion+
  • Blockchain: Ethereum, others via cross-chain
  • Distinction: Institutional-grade, CFTC-regulated. Became a preferred collateral token in several DeFi protocols. Acquired by and integrated into the Cumberland/DRW ecosystem.

Superstate — USTB

  • AUM: Growing rapidly
  • Blockchain: Ethereum
  • Distinction: Founded by Robert Leshner (Compound Finance founder). SEC-registered fund with on-chain share tracking.

OpenEden, Backed Finance, and Maple Finance

Smaller but notable players offering Treasury-backed tokens with various structures. OpenEden's TBILL token and Maple's cash management products serve specific niches in the institutional and DeFi markets.

Comparison Table

| Product | Issuer | AUM (approx.) | Chains | Min. Investment | Retail Access |

|---------|--------|---------------|--------|-----------------|---------------|

| BUIDL | BlackRock/Securitize | $2.5B+ | ETH, Avax, Polygon, others | $5M | No |

| FOBXX (Benji) | Franklin Templeton | $700M+ | Stellar, Polygon | Low | Yes |

| OUSG/USDY | Ondo Finance | $800M+ | ETH, Solana, Mantle | Varies | USDY: Yes |

| USYC | Hashnote | $1B+ | ETH | Institutional | No |

| USTB | Superstate | Growing | ETH | Accredited | No |

Risks and Considerations

Tokenized Treasuries are not risk-free despite their underlying assets being considered safe:

  • Smart Contract Risk: Bugs or vulnerabilities in the token contracts

  • Counterparty Risk: The fund manager, custodian, or transfer agent could face operational failures
  • Regulatory Risk: Changing regulations could restrict issuance or transfers
  • Liquidity Risk: Redemptions depend on the issuer; secondary market liquidity varies
  • Permissioned Nature: Most products require KYC, limiting composability with permissionless DeFi
  • Jurisdictional Restrictions: US persons may be excluded from some products; others are US-only

The Bigger Picture: RWA and Institutional Convergence

Tokenized Treasuries represent the leading edge of the broader RWA tokenization movement. According to estimates from BCG and ADDX, the tokenized asset market could reach $16 trillion by 2030.

What makes Treasuries the perfect starting point:

  • Standardized: Treasury bills are fungible, well-understood instruments
  • High demand: Crypto ecosystems need productive collateral and yield
  • Regulatory clarity: Treasuries are regulated securities with established frameworks
  • Institutional trust: Names like BlackRock and Franklin Templeton reduce adoption friction

The next frontier includes tokenized money market funds, corporate bonds, equities, and private credit — many of which are already in development.

Key Takeaways

  • Tokenized US Treasuries bring government bond yields on-chain, currently representing a $6B+ market

  • BlackRock's BUIDL is the largest single fund but faces strong competition from Ondo, Franklin Templeton, Hashnote, and others
  • These products serve as on-chain risk-free rate primitives with growing DeFi integrations
  • Most products remain permissioned (KYC required), creating a hybrid model between TradFi and DeFi
  • This sector represents the most concrete evidence yet of institutional-crypto convergence

Whether you're a DeFi protocol looking for sustainable yield, a DAO treasurer seeking safe collateral, or an investor wanting Treasury exposure without leaving the blockchain, tokenized Treasuries are rapidly becoming essential infrastructure in the Web3 financial stack.