Understanding BlackRock's Tokenized Fund Experiment BUIDL: Model, Current Status, and Challenges
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Understanding BlackRock's Tokenized Fund Experiment BUIDL: Model, Current Status, and Challenges
The tokenized fund BUIDL represents traditional institutions leveraging public blockchain technology to enhance operational and capital efficiency, signaling broader adoption of blockchain technology.
Navigating Web3 tides with focused insightsAuthor: DigiFT
Executive Summary
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Introduction: On March 20, 2024, BlackRock, a leading asset management firm, expanded its presence in Web3 by launching a tokenized fund called BUIDL (BlackRock USD Institutional Digital Liquidity Fund) in partnership with U.S.-based tokenization platform Securitize. This move follows the approval of its spot Bitcoin ETF and marks significant progress in mainstream crypto investment. The BUIDL fund exemplifies how traditional institutions are leveraging public blockchain technology to enhance operational and capital efficiency, signaling broader adoption of blockchain infrastructure.
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Problems solved by tokenized funds: Traditional publicly offered funds such as money market funds involve multiple intermediaries operating on isolated databases, resulting in inefficiencies and high costs. Tokenized funds issued on public blockchains eliminate the need for centralized recordkeeping by providing real-time, traceable transaction records that reduce costs. They enable atomic settlement and secondary market trading, improving capital utilization and returns. Additionally, they support diverse applications like staking and lending via smart contracts.
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Institutional adoption of public blockchains: While DeFi showcases the advantages of blockchain, moving traditional financial capital into Web3 faces substantial resistance. Tokenized funds with KYC/AML-compliant whitelists reflect institutional efforts to explore DeFi. Examples include Franklin Templeton’s FOBXX and WisdomTree’s WTSYX, which initially used blockchains only for auxiliary accounting. BlackRock's BUIDL represents a breakthrough by using a public blockchain as the primary ledger, enabled through collaboration with Securitize, a regulated transfer agent.
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BUIDL design and performance: Issued as an ERC-20 token on Ethereum, BUIDL enables real-time on-chain transfers among whitelisted addresses. It interacts with smart contracts and allows instant USDC redemptions via Circle. As of July 9, 2024, BUIDL managed $502.8 million across 17 addresses, including major participation from institutions like Ondo Finance. BUIDL facilitates DeFi integration by channeling stable real-world yields into the DeFi ecosystem.
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Challenges and outlook: Despite BUIDL’s success, significant regulatory and compliance hurdles remain. Global regulators maintain conservative stances toward asset tokenization, restricting issuance to qualified investors. However, initiatives by BlackRock and Franklin Templeton are drawing attention to the efficiency of on-chain operations and driving development of new laws and standards.
On March 20, 2024, asset management giant BlackRock further extended its Web3 strategy following the launch of its spot Bitcoin ETF, issuing the tokenized fund BUIDL (BlackRock USD Institutional Digital Liquidity Fund) in collaboration with U.S.-based tokenization platform Securitize. If the approval of spot Bitcoin ETFs signifies recognition of cryptocurrencies as a legitimate asset class accessible to compliant capital, then the emergence of tokenized funds carries even greater significance—marking institutional acknowledgment and adoption of public blockchains as foundational technology to improve operational and capital efficiency.
What problems do tokenized funds solve compared to traditional funds?
Publicly available funds, such as money market funds, are widely accessible due to low entry barriers, broad coverage, and large capital pools. These funds are strictly regulated. Unless otherwise specified, their operation typically involves coordination among multiple institutions, each handling part of the process—such as distribution (banks, brokers, financial advisors), administration, transfer agency, auditing, custody, and exchanges—to ensure specialization, efficiency, and checks against centralization or misconduct.
However, inconsistencies between these institutions’ databases create friction and increase costs. Each subscription or redemption usually requires data synchronization across all parties, involving manual or automated order transmission followed by settlement systems that often take several days to finalize transactions.
Fund tokenization addresses this by issuing fund shares as tokens on a public blockchain. Shares are directly delivered to investor wallets, with holdings and net asset values visible on-chain. All transactions are immutably recorded and instantly accessible, eliminating the need for centralized registries and reducing reconciliation overhead.
Through smart contracts, distribution platforms can achieve real-time atomic settlement between fund tokens and payment tokens (e.g., stablecoins), minimizing investor wait times. If secondary markets exist on-chain, investors can enter and exit instantly, reducing the amount of idle cash reserves needed within the fund for redemptions—thereby increasing capital efficiency and generating higher returns. Investors benefit from fast, transparent trading without enduring long subscription or redemption cycles.
Additionally, tokenized funds unlock more use cases, such as staking and lending through smart contracts, meeting broader user demands.
Institutional exploration of public blockchains — From auxiliary tools to primary ledgers
DeFi fully demonstrates the strengths of blockchain technology, but migrating vast traditional financial assets from Web2 systems to Web3-based infrastructures remains challenging and must be approached incrementally with innovative solutions.
For compliance reasons—especially KYC and AML requirements—fund tokens differ from typical cryptocurrencies by implementing whitelist controls. Each whitelisted address corresponds to a verified investor approved through the platform’s KYC process; transfers to non-whitelisted addresses fail. Free wallet-to-wallet transfers introduce risks related to loss, fraud, and monitoring, which remain difficult to resolve without robust risk management frameworks.
Nevertheless, major asset managers are exploring DeFi, adapting their products to leverage blockchain features. Their product designs reveal an evolving trajectory.
In 2021, U.S. asset manager Franklin Templeton launched the Franklin Onchain U.S. Government Money Fund (FOBXX). Initially, official records were maintained by a transfer agent on a private database, with secondary entries on Stellar and Polygon blockchains. In case of discrepancies, the centralized ledger took precedence. Investors traded fund tokens via Franklin’s app, receiving a linked on-chain address—but could not transfer tokens out of their wallets. In 2022, WisdomTree issued a similar short-term U.S. Treasury tokenized fund, WTSYX, on the Stellar blockchain.
The designs of FOBXX and WTSYX treated blockchain merely as a supplementary accounting tool, publishing share records without realizing tangible benefits.
In contrast, BlackRock’s BUIDL, issued via Securitize in March 2024, marked a major leap forward. A key reason is that Securitize operates as a regulator-approved registered transfer agent, enabling the use of a public blockchain as the primary ledger for recording ownership and changes in asset titles.
Diving into BUIDL’s design — Challenges and improvements
According to BUIDL’s offering documents, the basic issuance details are as follows:
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Issuer: BlackRock USD Institutional Digital Liquidity Fund Ltd. (a BVI entity established in 2023 under BlackRock)
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Registration exemption: SEC Reg D Rule 506(c), Section 3(c)(7) (Reg D allows fundraising from accredited investors without limits on number or size)
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Type of security: Pooled investment fund
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Investor qualification: Qualified Purchaser
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Minimum investment: $5 million for individuals; $25 million for institutions
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Scale: No cap on issuance or number of investors
At launch, the sole distribution channel was Securitize Markets, LLC, a SEC-registered securities broker-dealer. Furthermore, Securitize, LLC—a related entity—is a SEC-registered transfer agent authorized to register and record securities ownership on the blockchain.
Notably, the fund uses a newly formed BVI subsidiary rather than BlackRock’s standard fund vehicle, likely to isolate potential risks and protect its core regulated entities. The four individuals named in the SEC filing are Ian Pilgrim (Bermuda), Jennifer Collins (Cayman Islands), W. William Woods (Canada), and Noëlle L’Heureux (California, USA). Only Noëlle L’Heureux is a Managing Director at BlackRock with over 32 years of tenure; the others appear to represent third-party service providers.
BUIDL Product Design
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Currencies accepted: USD and USDC
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Subscription/redemption: Daily
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Investment strategy: Primarily short-term U.S. Treasuries
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Share value: 1 BUIDL = $1 USD
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Token standard: Customized ERC-20 with a whitelist mechanism; tokens can only circulate among whitelisted addresses; transfers to non-whitelisted addresses will fail
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Yield calculation: Interest accrues daily at 3:00 PM Eastern Time based on holdings, distributed monthly on the first business day via token minting and airdrop
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Redemption rules: Daily redemption at par (1 BUIDL = $1 USD). Direct redemption via Securitize requires sending BUIDL to a designated address. Tokens are burned off-chain after 3:00 PM each business day, with USD disbursed accordingly—typically T+0. Accrued interest since the last distribution requires a "full redemption" request, completed 2–3 business days after the next payout date.
BUIDL is an ERC-20 token issued on the Ethereum blockchain, allowing free transfer among whitelisted addresses—including interactions with whitelisted smart contracts. Any interaction with non-whitelisted addresses fails. For DeFi users, this simple functionality represents a monumental shift in traditional finance: a major institution recognizing public blockchains as valid ledgers for recording asset ownership and transfers, leveraging their transparency, efficiency, and auditability.
By enabling wallet transfers, BUIDL taps into the advantages of blockchain-based settlement. One notable application comes from Circle, which introduced a contract enabling instant BUIDL-to-USDC exchange shortly after BUIDL’s launch, backed by a $100 million USDC reserve to facilitate real-time redemptions at a 1:1 ratio.
This redemption option, provided by Circle, functions essentially as an OTC trade: Circle deploys an exchange contract (the “Redemption” address below). When users send funds to it, the contract triggers a transfer of USDC from another EOA (the “holder” address below) directly to the user—all executed on-chain with atomic settlement.
Figure 1: Diagram of Circle’s USDC redemption contract for BUIDL
Initially, the holder EOA contained $100 million in USDC. Since BUIDL’s interest accrual is still managed off-chain, when users redeem via Circle’s contract, BlackRock views it as a transfer—not a redemption—so accrued interest continues to be paid at the next distribution cycle. After acquiring BUIDL tokens, Circle holds them and decides subsequent actions. Chain data shows Circle periodically redeems BUIDL through Securitize for USD, then mints new USDC to replenish the pool.
BUIDL three months post-launch: What’s the current status?
On May 15, 2024, BUIDL surpassed Franklin Templeton’s tokenized government bond fund FOBXX in AUM (Assets Under Management), becoming the largest tokenized fund. As of October 17, 2024, total AUM reached $557 million. Compared to the trillions in traditional markets, however, the entire tokenized treasury sector stands at just $2.35 billion (source: RWA.XYZ, October 17, 2024), indicating massive growth potential.
BUIDL is currently held by 27 addresses, with holdings distributed as follows:
Figure 2: Distribution of BlackRock BUIDL token holdings (data as of October 17, 2024)
Securitize allows up to 10 whitelisted on-chain addresses per client. Among the 27 addresses, two belong to Ondo Finance—the largest holder—with 216 million BUIDL ($216 million), allocated across addresses 0x72 (~164 million BUIDL) and 0x28 (~51 million BUIDL). These serve as underlying assets for Ondo’s tokenized Treasury fund OUSG (AUM: $216 million), which previously held BlackRock iShares short-term Treasury ETFs before fully transitioning to BUIDL. OUSG now offers instant USDC redemptions via Circle’s redemption contract.
Due to partnerships with several crypto custodians, many on-chain addresses appear as EOAs with no prior transaction history. Some may belong to traditional institutions invited by BlackRock and Securitize to experiment with tokenized fund investments, whose holdings are stored in custodial accounts.
Circle’s USDC redemption pool currently holds $80.03 million in USDC. Primary redemptions come from Ondo Finance, while the Circle address (0xcf) retains approximately 19.96 million BUIDL.
Figure 3: USDC balance in BUIDL USDC redemption contract (data as of October 17, 2024)
The path toward institutional DeFi integration
Given BUIDL’s high investment threshold, most retail investors cannot access it directly. However, by issuing a secure, yield-generating money market fund on-chain, BlackRock enables other institutions to use BUIDL as base-layer exposure, bringing stable real-world returns into DeFi.
A prime example is Ondo Finance. As the largest BUIDL holder, Ondo leverages BUIDL and Circle’s redemption contract to offer rapid USDC subscriptions and redemptions for its OUSG fund, lowering the entry barrier from $5 million to $5,000. Moreover, Ondo collaborates with DeFi protocols like Flux Finance—a DeFi lending platform—to extend real-world yields to anonymous DeFi users. This layered architecture channels institutional-grade real-world returns into the DeFi ecosystem.
Full institutional adoption? Still facing major obstacles
Products like BUIDL enhance liquidity management in money market funds through hybrid on-chain/off-chain designs and provide on-chain investors access to real-world yields. By tokenizing funds and collaborating with Web3 players like Securitize, Circle, and Ondo Finance, BlackRock enables Web3 entities to access real-world returns in token form—avoiding complex fiat onboarding processes—and enhances interoperability and capital efficiency via smart contracts.
Crucially, BUIDL enables direct on-chain transfers between investors without requiring intermediary processing—a seemingly simple feature with immense compliance and legal implications. In traditional finance, transferring between accounts—even under the same name—is highly restricted, with most platforms limiting activity to internal trading, subscriptions, and redemptions. Within a month of BUIDL launching this capability, Franklin Templeton enabled similar functionality for FOBXX, reflecting growing institutional acceptance of public blockchains as valid ledgers—an important product-level breakthrough. (Note: FOBXX holders do not control private keys, so transfers remain confined within the platform, not true on-chain operations.)
Globally, regulation around asset tokenization remains conservative. In the U.S., lacking clear legislation, issuers rely on exemptions like Reg D. BlackRock mitigates risk by issuing via a BVI SPV. In jurisdictions like Singapore, tokenized assets face whitelist restrictions and are limited to qualified investors. Such constraints and regulatory uncertainty continue to hinder wider institutional and user adoption of Web3.
Positively, deep involvement from firms like BlackRock and Franklin Templeton draws significant attention from the financial industry, demonstrating the efficiency of on-chain interactions through real-world examples and actively pushing regulators to develop new laws and standards.
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