BlackRock filed paperwork with the U.S. Securities and Exchange Commission on May 8, 2026, to launch two tokenized money-market funds aimed at investors who hold their cash in stablecoins rather than traditional bank accounts. The first is a digital share class of the $6.1 billion BlackRock Select Treasury Liquidity Fund, ticker BSTBL, which will trade on Ethereum. The second is a new vehicle called the BlackRock Daily Reinvestment Stablecoin Reserve Vehicle, or BRSRV, designed for self-custodied wallets and slated to launch on multiple blockchains. The world’s largest asset manager, with roughly $13 trillion under management, is signaling that the stablecoin economy is now a permanent customer base — not a fringe experiment.
A tokenized money-market fund is a regulated fund whose shares are issued and transferred as tokens on a public blockchain, allowing holders to move them peer-to-peer while still earning yield from the underlying Treasury portfolio.
Key takeaways
- Two new funds. BSTBL is a digital share class of an existing $6.1 billion Treasury fund. BRSRV is a built-from-scratch product for stablecoin holders who self-custody.
- Ethereum first, then multi-chain. BSTBL launches on Ethereum. BRSRV is approved for multiple networks per the SEC filing.
- Built around the GENIUS Act. Filings are timed to the U.S. stablecoin framework, which bars passive yield on stablecoins themselves but allows yield-bearing reserve products held alongside them.
- Tokenized fund market hits $30B. The on-chain fund market has added roughly $10 billion since January 2026, with more than 767,000 holders.
Published: May 10, 2026 16:00 UTC
What BlackRock filed and why it matters
The first filing creates a digital share class of the BlackRock Select Treasury Liquidity Fund, which holds cash, U.S. Treasury bills, and other short-dated instruments with maturities of 93 days or less. The digital shares will trade on Ethereum and sit alongside the fund’s existing traditional share classes. Holders can settle on-chain in seconds rather than waiting on T+1 fund administrators.
The second filing, BRSRV, is the more novel product. It is built from the ground up for investors who keep their cash in stablecoins and prefer to hold their own keys rather than custody assets at a brokerage. According to the SEC paperwork, BRSRV will be available on multiple blockchain networks, not just Ethereum.
BlackRock already operates BUIDL, its existing tokenized Treasury fund, which has roughly $2.6 billion in assets under management and provides about 90% of the reserve backing for Ethena’s USDtb and Jupiter’s JupUSD. The new filings extend that playbook from institutional buyers to self-custody crypto users and stablecoin issuers directly.
The regulatory angle: GENIUS Act and CLARITY Act
The timing is not accidental. The U.S. Senate Banking Committee is scheduled to vote on the Digital Asset Market CLARITY Act on May 14, 2026, and the GENIUS Act stablecoin framework is moving in parallel. Under the current compromise text, stablecoin issuers cannot pay passive yield on idle balances — the kind of interest that makes a stablecoin function like a savings account.
That ban creates a vacuum. Crypto holders who want yield on their dollars need a separate, regulated wrapper. A tokenized money-market fund is exactly that wrapper: a fund share that pays Treasury yield, held next to a stablecoin in the same wallet. BRSRV appears designed to occupy that lane, and analysts have flagged it as a likely reserve-asset candidate for stablecoin issuers themselves.
BlackRock has separately pushed back on a draft Office of the Comptroller of the Currency rule that would cap tokenized reserve assets at 20% of stablecoin backing, arguing the limit would undermine liquidity. The new filings effectively double down on that position by giving the firm two more compliant products to place into reserves if the cap is loosened.
Impact on traders, issuers, and the broader market
The total tokenized fund market now exceeds $30 billion across more than 767,000 investors, up roughly $10 billion since January 2026. BlackRock’s BUIDL alone has anchored a meaningful share of that growth by serving as reserve collateral for two of the larger yield-bearing stablecoins.
For traders, BSTBL on Ethereum means a regulated, daily-yield instrument that can be used as collateral in DeFi protocols without leaving an institutional product. For stablecoin issuers, BRSRV is a credible reserve asset they can hold under U.S. law once GENIUS becomes binding. For competing asset managers — Franklin Templeton, Fidelity, WisdomTree — it is a clear signal to accelerate their own tokenized fund roadmaps or cede the on-chain Treasury market to BlackRock.
The downside risk is regulatory. The CLARITY Act vote on May 14 could still produce yield restrictions that touch tokenized funds, not just stablecoins. And the OCC’s reserve-asset cap, if finalized at 20%, would limit how much of any single stablecoin’s backing can sit in BRSRV or BUIDL.
What comes next
BlackRock has not disclosed launch dates, but tokenized share classes for established funds typically clear SEC review in two to four months once filed. The Senate Banking Committee vote on CLARITY on May 14 will determine whether BlackRock launches into a settled regulatory regime or one still being argued in committee. Either way, the filings make it harder to argue that tokenized U.S. Treasury exposure is a niche product.
FAQ
What is the difference between BSTBL and BRSRV?
BSTBL is a new digital share class of an existing $6.1 billion BlackRock Treasury fund and will trade on Ethereum. BRSRV is a brand-new fund built specifically for stablecoin holders who self-custody their assets, and it will launch on multiple blockchain networks. BSTBL targets institutional and broker-held investors. BRSRV targets self-custody crypto users and stablecoin issuers.
Why is BlackRock launching these now?
The U.S. GENIUS Act stablecoin framework prohibits issuers from paying passive yield on stablecoin balances. That creates demand for a separate, regulated wrapper that pays Treasury yield and can be held alongside stablecoins in the same wallet. BlackRock is positioning BSTBL and BRSRV to fill that role before competitors do.
How is BRSRV different from BUIDL?
BUIDL is BlackRock’s institutional tokenized Treasury fund and currently holds about $2.6 billion in assets, much of it backing yield-bearing stablecoins like Ethena’s USDtb. BRSRV is designed for individual stablecoin holders and self-custody wallets, and is filed for launch on multiple blockchains rather than just Ethereum.
