Points of Focus

• BlackRock launched BSTBL and BRSRV, both structured as GENIUS Act eligible reserve assets.
• BUIDL’s $2.6 billion is roughly 0.24% of BlackRock’s $1.07 trillion cash book.
• BRSRV targets stablecoin issuers as its core client base, with Securitize as the transfer agent.

BlackRock expanded its cash management strategy on August 3, 2026, launching two tokenized money market products: OnChain Shares of the BlackRock Select Treasury Based Liquidity Fund (BSTBL) and the BlackRock Daily Reinvestment Stablecoin Reserve Vehicle (BRSRV), according to the company’s release. 

BlackRock has launched two tokenized money market funds.

The $6.2 billion BlackRock Select Treasury Based Liquidity Fund (BSTBL) now has a tokenized share class issued on @ethereum, with BNY as transfer agent and tokenization provider.

A second vehicle, BRSRV, launches… pic.twitter.com/qz9Srpqa8F

— Ethereum Institutional (@ethereuminsti) August 3, 2026

Both funds are structured to qualify as eligible reserve assets for permitted US payment stablecoin issuers under the GENIUS Act, extending BlackRock’s tokenization push beyond BUIDL, its existing tokenized fund.

Two funds, two transfer agents

BSTBL introduces a tokenized share class on the Ethereum blockchain of BlackRock’s existing Select Treasury Based Liquidity Fund. The OnChain Shares can be transferred between approved investor wallets, subject to applicable law, with BNY serving as the transfer agent and tokenization provider. 

BRSRV is a newly launched fund built for digitally native institutional investors, featuring daily dividend reinvestment and multi-blockchain accessibility, with Securitize as its transfer agent, per the release. Both funds invest in cash, short-term US Treasury securities, and overnight repurchase agreements backed by US Treasuries.

“Cash remains a foundational building block for investors, corporations, and financial institutions,” said Jon Steel, Global Head of Product and Platform for BlackRock’s Cash Management business. “As demand grows for high-quality reserve assets to support stablecoins and other tokenized financial products, these funds provide clients with additional choice in how they access and use money market fund investment solutions across traditional and digital markets.”

The scale the launch announcement leaves out

BlackRock’s Cash Management Group oversees nearly $1.073 trillion in cash strategies, per the release’s own figure. BUIDL, BlackRock’s flagship tokenized fund launched in 2024, holds about $2.6 billion in assets, as per RWA.xyz data.

That puts BUIDL at roughly 0.24% of BlackRock’s total cash book. This gap positions Monday’s launch as an incremental addition to a still-marginal tokenized line rather than a strategic pivot, even as the GENIUS Act reshapes reserve requirements for stablecoin issuers nationwide.

The release cites SEC data putting the broader US money market fund industry at more than $8.4 trillion as of May 2026. Against that backdrop, BlackRock’s tokenized products remain a narrow slice of both its own cash platform and the traditional fund industry it is trying to bring onchain. This dynamic also shapes how institutional Ethereum products and other tokenized instruments are being adopted. 

That broader onchain finance push has also drawn scrutiny from compliance and security tooling firms, including TRM Labs, as more institutional capital moves onto public blockchains where transaction monitoring becomes a bigger operational question. 

The GENIUS Act framework itself sits alongside a wider debate over how much of the underlying protocol layer, discussed at length in Vitalik Buterin’s article on trustless infrastructure, can support this kind of regulated institutional product without reintroducing centralized points of failure.

What comes next

BRSRV’s design, daily dividend reinvestment, and access across multiple blockchains target exactly the stablecoin-issuer reserve demand the GENIUS Act was written to regulate. 

Whether it closes the gap with BUIDL depends on adoption, but BlackRock has not yet demonstrated: BUIDL took roughly two years to reach $2.6 billion against a cash platform measured in the trillions. If BRSRV and BSTBL scale faster than that precedent, driven by AI-linked tokenization demand and stablecoin issuers actively seeking GENIUS Act-compliant reserves, the 0.24% figure becomes a starting point rather than a ceiling. BlackRock has not disclosed initial AUM figures for either fund as of August 4, 2026.