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BlackRock launched two tokenized money market funds on August 3, 2026, both structured to qualify as eligible reserve assets for permitted US payment stablecoin issuers under the GENIUS Act. The world's largest asset manager is entering a product category that State Street, Fidelity, Invesco, and Morgan Stanley built out over the preceding two months.
The first product, OnChain Shares of the BlackRock Select Treasury Based Liquidity Fund (BSTBL), is a tokenized share class of an existing fund issued on Ethereum, with BNY Mellon serving as transfer agent and tokenization provider. The second, the BlackRock Daily Reinvestment Stablecoin Reserve Vehicle (BRSRV), is a newly created fund built for digitally native institutions, spanning multiple blockchains with Securitize as transfer agent.
Both invest in cash, short-term US Treasuries, and overnight repurchase agreements collateralized by Treasuries. BlackRock filed for the products with the SEC in May.
"US money market funds have grown to more than $8.4 trillion in assets as investors continue to prioritize liquidity, capital preservation, and the potential for yield." - Jon Steel, Global Head of Product and Platform, BlackRock Cash Management
Key Takeaways
- BlackRock launched BSTBL and BRSRV on August 3, 2026, both targeting GENIUS Act reserve eligibility.
- BSTBL tokenizes an existing fund on Ethereum, with BNY Mellon as transfer agent and tokenization provider.
- BRSRV is purpose-built for stablecoin reserves, multi-chain, with daily dividend reinvestment and Securitize as transfer agent.
- BlackRock already manages roughly $60 billion in Circle reserves, giving it an existing foothold with the second-largest issuer.
- CFO Martin Small has stated the goal plainly, saying BlackRock wants to be the industry's stablecoin reserve manager of choice.
What BlackRock Launched
The two products serve different customers. BSTBL takes the roughly $6.1 billion Select Treasury Based Liquidity Fund and issues a tokenized share class on Ethereum, letting eligible investors transfer onchain shares between approved wallets while the underlying fund operates unchanged alongside traditional share classes.
BRSRV is the more novel launch. It is a newly created tokenized money market fund aimed at institutions that manage treasury through crypto wallets rather than brokerages, it automatically reinvests dividends daily, and it is available across multiple blockchains including Ethereum and Solana.
The split in service providers is worth noting. BNY Mellon handles transfer agency and tokenization for BSTBL, the same role it plays for BlackRock's flagship BUIDL fund, while Securitize takes those duties for BRSRV.
The scale behind the launch is substantial. BlackRock's Cash Management Group oversees close to $1.073 trillion in cash strategies for corporations, banks, insurers, foundations, and public funds, and BUIDL has grown to roughly $2.5 billion since its 2024 debut.
Why This Matters for Stablecoins
Reserve management has become the most contested institutional segment of the stablecoin market. Under the GENIUS Act, permitted payment stablecoin issuers must hold reserves in a narrow set of eligible assets, which turned that mandate into a product opportunity for every major asset manager.
The category filled in fast. State Street launched SSCXX on June 17, Fidelity followed with the Reserves Digital Fund on June 19, and Invesco filed on June 26, a compressed wave we documented in our June 2026 stablecoin report.
BlackRock arrives last but heaviest. Its existing relationship managing roughly $60 billion in Circle reserves means it is not competing for a foothold in stablecoin reserve management, it is productizing a business it already runs at scale.
The onchain structure is the differentiator. Where State Street and Fidelity built conventional money market funds calibrated to GENIUS Act eligibility, BRSRV is tokenized from inception and multi-chain, which matters for issuers that want reserve positions to settle and move on the same rails as the stablecoins they back.
The Timing: One Day Before Circle's Earnings
The launch lands the day before Circle reports second-quarter results on August 5. That proximity is unlikely to be accidental given BlackRock's role in Circle's reserve stack.
Circle's economics have come under pressure from distribution costs, with partners capturing a growing share of reserve income, so the question of where reserves sit and what they earn is central to the story investors will hear this week. A tokenized reserve vehicle from the manager already holding the bulk of those assets sharpens that conversation.
BlackRock has been explicit about the ambition. CFO Martin Small told the firm's own Q2 2026 earnings call that BlackRock intends to be the stablecoin reserve manager of choice, which is a notably direct claim for an asset manager describing a market that barely existed two years ago.
The competitive stakes extend past Circle. Every permitted issuer under the GENIUS Act needs eligible reserves, and whoever manages those assets earns fees on a base that grows with stablecoin supply regardless of which token wins.
Tokenized Cash as a Category
The launch also advances a broader convergence between money market funds and stablecoins. Both are dollar-denominated instruments backed by short-term Treasuries, and tokenization is collapsing the operational distance between them.
BlackRock has been building toward this from the tokenized asset side. BUIDL established the model in 2024 and is now used across crypto markets as collateral for borrowing and leveraged trading, a role we mapped in our tokenized Treasury funds analysis.
The regulatory frame makes the distinction load-bearing. Payment stablecoins cannot pay yield to holders under the GENIUS Act, whose implementation we tracked in our GENIUS Act rulemaking analysis, while tokenized money market funds can, which is precisely why capital has been rotating from one to the other.
That rotation is the quiet subtext of this launch. Stablecoin supply has contracted since May while tokenized Treasury products have grown toward $17 billion, and BlackRock now has products positioned on both sides of that flow.
Conclusion
BlackRock's entry completes the roster of major asset managers competing to hold stablecoin reserves, and it arrives with advantages the others lack: an existing multi-billion-dollar issuer relationship, the largest cash management franchise in the world, and two years of tokenized fund operating history through BUIDL.
The dual-product structure is the strategic tell. BSTBL serves institutions moving traditional positions onchain while BRSRV serves institutions that were never off it, which covers both directions of travel in a market where nobody is certain which side grows faster.
What remains unproven is demand. Reserve funds have launched in rapid succession without public evidence of which issuers are actually allocating to them, and that question, more than product design, will determine whether this category becomes a real business or a well-capitalized waiting room.
FAQ:
1. What did BlackRock launch on August 3, 2026?
BlackRock launched two tokenized money market funds: OnChain Shares of the BlackRock Select Treasury-Based Liquidity Fund (BSTBL), a tokenized share class of an existing fund on Ethereum, and the BlackRock Daily Reinvestment Stablecoin Reserve Vehicle (BRSRV), a newly created multi-chain fund. Both invest in cash, short-term US Treasuries, and Treasury-backed overnight repurchase agreements.
2. What is BRSRV and who is it for?
BRSRV is a newly created tokenized money market fund designed for digitally native institutional investors and stablecoin reserve management. It automatically reinvests dividends daily, is available across multiple blockchains including Ethereum and Solana, and uses Securitize as its transfer agent and tokenization provider.
3. Are these funds GENIUS Act eligible?
BlackRock states both funds' investment strategies are designed to make them eligible reserve assets for permitted US payment stablecoin issuers under the GENIUS Act. The legislation requires issuers to back tokens at least one-to-one with a narrow set of eligible assets including US Treasuries, cash, and Treasury-backed repurchase agreements.
4. How does this compare to State Street and Fidelity's reserve funds?
State Street launched SSCXX on June 17, and Fidelity launched its Reserves Digital Fund on June 19, both as conventional money market funds calibrated to GENIUS Act eligibility. BlackRock's BRSRV differs by being tokenized from inception and available across multiple blockchains, letting reserve positions settle on the same rails as the stablecoins they back.
5. Does BlackRock already manage stablecoin reserves?
Yes. BlackRock manages roughly $60 billion in reserves for Circle, the issuer of USDC, and its BUIDL tokenized money market fund has grown to approximately $2.5 billion since launching in 2024. CFO Martin Small said on the firm's Q2 2026 earnings call that BlackRock aims to be the stablecoin reserve manager of choice.
Disclaimer:
This content is provided for informational and educational purposes only and does not constitute financial, investment, legal, or tax advice; no material herein should be interpreted as a recommendation, endorsement, or solicitation to buy or sell any financial instrument, and readers should conduct their own independent research or consult a qualified professional.
