BlackRock Tokenized Treasury Fund BUIDL Hits $2B AUM

BUIDL Reaches $2 Billion Milestone

BlackRock's USD Institutional Digital Liquidity Fund, known by its ticker BUIDL, has crossed $2 billion in assets under management. The milestone, reached in mid-March 2026, cements BUIDL's position as the single largest tokenized real-world asset fund and represents a tenfold increase from its initial $200 million at launch less than two years ago.

The growth trajectory tells a clear story about institutional appetite for blockchain-based financial products. BUIDL took six months to reach $500 million, another four months to hit $1 billion, and just five more months to double again to $2 billion. The acceleration reflects both growing institutional comfort with tokenized assets and the practical advantages that blockchain settlement offers over traditional fund infrastructure.

BlackRock CEO Larry Fink has repeatedly called tokenization "the next generation for markets," and BUIDL serves as the firm's proof of concept. With $10.5 trillion in total assets under management, BlackRock's decision to commit significant resources to tokenized funds sends a signal that the world's largest asset manager views blockchain infrastructure as a permanent part of the financial system.

How BUIDL Works: Structure, Yield, and Mechanics

BUIDL is a tokenized money market fund that invests in short-term U.S. Treasury bills, repurchase agreements backed by Treasuries, and cash. Each BUIDL token represents one share of the fund with a target net asset value of $1.00. The fund is managed by BlackRock and administered by Securitize, which handles the tokenization and on-chain distribution.

Yield Generation and Distribution

The fund generates yield from its underlying Treasury investments, currently paying an annualized rate of approximately 4.5% based on prevailing short-term Treasury yields. Yield accrues daily and is distributed to token holders as additional BUIDL tokens on the first business day of each month. This mechanism allows the per-token price to remain stable at $1.00 while investors accumulate additional tokens representing their earnings.

The yield distribution distinguishes BUIDL from stablecoins. While both maintain a dollar peg, stablecoins like USDC pass no yield to holders (the issuer keeps interest earned on reserves). BUIDL returns nearly all investment income to token holders after management fees, making it a yield-bearing alternative to holding idle stablecoins.

Fund Structure and Custody

BUIDL operates as a BVI-domiciled fund registered under Regulation D, limiting participation to qualified purchasers and accredited investors. Bank of New York Mellon serves as the fund's custodian, holding the underlying Treasury securities, while PricewaterhouseCoopers provides independent auditing. This institutional-grade structure was intentional. BlackRock designed BUIDL to meet the compliance and due diligence standards that large allocators require before committing capital.

Multi-Chain Expansion and DeFi Integration

BUIDL launched exclusively on Ethereum but has since expanded to Polygon, Arbitrum, Optimism, and Avalanche. This multi-chain approach increases the fund's addressable market and allows BUIDL tokens to be used across different DeFi ecosystems. Cross-chain transfers between supported networks are facilitated through Securitize's transfer agent infrastructure, which ensures that all token holders remain whitelisted and compliant regardless of which chain they operate on.

DeFi Protocol Integrations

The most significant development in BUIDL's recent history is its growing integration with DeFi protocols. Several lending platforms now accept BUIDL tokens as collateral, allowing investors to borrow stablecoins against their Treasury-backed position without selling the underlying asset. This creates a capital-efficient loop where investors earn Treasury yield on their collateral while deploying borrowed capital elsewhere.

Maker (now Sky) was among the first major protocols to accept BUIDL as collateral for DAI minting. Aave has also integrated BUIDL into its institutional pool, allowing qualified participants to use tokenized Treasuries as borrowing collateral. These integrations represent a meaningful step toward merging traditional fixed-income products with decentralized lending infrastructure.

The DeFi integrations have driven a notable portion of BUIDL's AUM growth. On-chain data shows that approximately $400 million of BUIDL's $2 billion AUM is currently deposited in DeFi protocols, either as collateral or as yield-bearing reserves within protocol treasuries. This figure has grown from near zero just eight months ago.

The Tokenized Treasury Market at $5 Billion

BUIDL's growth has occurred within a rapidly expanding tokenized Treasury market. The total value of tokenized U.S. Treasury products across all issuers has crossed $5 billion, up from less than $800 million at the start of 2025. BlackRock's BUIDL accounts for roughly 40% of this total, but competition is intensifying.

Competitive Field

Franklin Templeton's BENJI fund, which launched before BUIDL, holds approximately $700 million in tokenized Treasury assets. Ondo Finance's OUSG product has attracted over $500 million, with additional products from Hashnote, Superstate, and Backed Finance contributing to the sector's growth. Each competitor has carved out a different niche based on chain availability, minimum investment thresholds, and DeFi integration depth.

The broader real-world asset tokenization movement extends well beyond Treasuries. Tokenized private credit, real estate, and commodities have collectively reached several billion dollars in on-chain value. But Treasuries remain the dominant asset class for tokenization because they are standardized, highly liquid, and carry minimal credit risk, making them the simplest asset to bring on-chain with institutional confidence.

Growth Drivers

Several factors have fueled the tokenized Treasury market's expansion. First, persistently elevated interest rates have made Treasury yields attractive relative to the zero yield offered by stablecoins. For DeFi protocols and DAOs holding large stablecoin reserves, switching to tokenized Treasuries represents free money. Second, regulatory clarity has improved as the SEC and other regulators have become more familiar with tokenized securities. Third, infrastructure providers like Securitize, Centrifuge, and Maple have made it technically easier to issue and distribute tokenized assets.

Institutional Demand Drivers and Use Cases

Institutional investors are allocating to BUIDL for reasons that go beyond simple yield generation. The fund addresses several operational pain points in traditional asset management that blockchain infrastructure is uniquely positioned to solve.

24/7 Settlement and Liquidity

Traditional money market funds settle on a T+1 basis during standard business hours. Redemptions placed on a Friday afternoon do not settle until Monday or Tuesday. BUIDL tokens can be transferred or redeemed around the clock, any day of the year. For institutions managing global operations across time zones, this eliminates the settlement gaps that can create cash management challenges.

BlackRock has partnered with Circle to provide an instant BUIDL-to-USDC conversion facility. Token holders can redeem BUIDL for USDC at any time through a smart contract, receiving stablecoins within minutes rather than waiting for a traditional fund redemption to process. This feature has been particularly popular with crypto-native institutions that need rapid access to liquid capital.

Collateral Optimization

Using BUIDL as collateral in DeFi protocols creates value that is impossible with traditional money market fund shares. An institution that holds $50 million in BUIDL can simultaneously earn approximately 4.5% Treasury yield and borrow stablecoins against that position at DeFi lending rates. The net cost of borrowing, after accounting for the yield earned on collateral, can be significantly lower than traditional secured lending arrangements.

This collateral efficiency is attracting attention from prime brokers and institutional trading desks. Several crypto-focused prime brokers now accept BUIDL as margin collateral, allowing traders to post yield-bearing assets instead of non-yielding stablecoins or cash.

Treasury Management for DAOs and Protocols

Decentralized autonomous organizations (DAOs) and DeFi protocols collectively hold billions of dollars in stablecoin reserves that earn no yield. BUIDL provides a compliant path for these entities to earn Treasury returns on their idle capital while maintaining on-chain liquidity. Several major DeFi protocol treasuries have begun allocating portions of their reserves to BUIDL and competing tokenized Treasury products, a trend that BlackRock anticipated when designing the fund.

What BUIDL's Growth Means for Real-World Asset Tokenization

BUIDL's path to $2 billion provides a template for how traditional financial products can be successfully distributed through blockchain infrastructure. The fund demonstrates that institutional-grade compliance, familiar fund structures, and established brand trust can coexist with the programmability and efficiency of blockchain settlement.

BlackRock's success with BUIDL has prompted other major asset managers to accelerate their tokenization efforts. JPMorgan, Goldman Sachs, and Fidelity have all disclosed tokenization initiatives, ranging from private credit to equity funds. The competitive pressure from BUIDL's rapid growth is compressing what might have been a decade-long adoption curve into a matter of years.

Remaining Challenges

Despite the momentum, tokenized funds face several unresolved challenges. Regulatory fragmentation across jurisdictions creates complexity for funds seeking global distribution. The whitelisting requirement for BUIDL, while necessary for compliance, limits the composability that makes DeFi powerful. And the current minimum investment of $5 million excludes retail investors from direct participation, though this is partially addressed through feeder funds and DeFi integrations that offer lower entry points.

Interoperability between different tokenized asset platforms also remains a work in progress. A BUIDL token on Ethereum and a BENJI token on Stellar cannot easily interact or be used as interchangeable collateral. Industry efforts toward standardized token formats and cross-platform settlement are underway but have not yet produced a unified framework.

The Road Ahead

BlackRock has signaled that BUIDL is just the beginning. The firm is reportedly exploring tokenized versions of its bond, equity, and alternative investment funds. If BUIDL's growth trajectory is any indication, the total value of tokenized financial products managed by traditional asset managers could reach tens of billions of dollars within the next two years.

The $2 billion milestone is significant not because of the number itself, which is small relative to the trillions in traditional money market funds, but because of what it represents. The world's largest asset manager has proven that blockchain-based fund distribution works, that institutional investors are willing to use it, and that the technology delivers measurable advantages over legacy infrastructure. That proof of concept, backed by BlackRock's brand and resources, is likely to accelerate tokenization across the entire financial services industry.