The $6.1B BSTBL fund gets a digital share class on Ethereum, while a new multi-chain vehicle targets stablecoin issuers seeking Genius-compliant reserves.
BlackRock filed paperwork to put a digital share class on its $6.1 billion Treasury-focused money-market fund and to create an entirely new tokenized vehicle designed specifically for stablecoin issuers. The filings, made with the US Securities and Exchange Commission on Friday, accelerate the convergence of traditional short-term liquidity management and on-chain settlement, moving the stablecoin reserve stack closer to a 24/7 real-time model.
The first product converts existing shares of the BlackRock Select Treasury Based Liquidity Fund (BSTBL) into tokenized securities on the Ethereum blockchain. BSTBL invests in cash, US Treasury securities, and short-term debt instruments maturing within 93 days. The tokenized version will operate alongside traditional share classes, not replace them. For an investor whose operating capital sits in a crypto wallet rather than a brokerage account, that means the fund’s yield-bearing shares become native to the same rails where stablecoin liquidity already lives.
Choice of Ethereum as the initial chain is a practical decision. The network hosts the largest volume of stablecoin transactions and most institutional DeFi activity. Running a tokenized money-market fund on Ethereum removes the need to bridge assets back to bank accounts for overnight sweeps or rebalancing. Settlement for subscriptions and redemptions can happen at block times instead of end-of-day batch processing.
The other filing introduces a new vehicle called BlackRock Daily Reinvestment Stablecoin Reserve Vehicle (BRSRV). Unlike BSTBL, BRSRV is not an add-on to an existing fund but a standalone structure built for investors whose primary financial rail is a crypto wallet holding stablecoins. The SEC filing states it will operate across multiple blockchains, giving issuers flexibility to match their preferred settlement layer. That multi-chain design addresses a fragmentation problem: a stablecoin issued on Solana or Avalanche wants its reserve fund to settle on the same chain to avoid bridging latency and security risk.
The timing coincides with the proposed Genius Act, federal legislation that would set rules for dollar-backed stablecoins. Under the bill, stablecoin issuers need reserves that are highly liquid, easily redeemable, and held in instruments with minimal credit and duration risk. A tokenized government money-market fund that delivers instant, on-chain redemptions 24 hours a day checks each of those boxes. BlackRock appears to be building the compliant reserve infrastructure before the law is final.
BlackRock’s first tokenized fund, the BlackRock USD Institutional Digital Liquidity Fund (BUIDL), has grown to roughly $2.5 billion in assets. BUIDL holds short-term US government obligations and cash, pays yield directly to on-chain addresses, and allows near-instant transfers between qualified investors. Its rapid growth demonstrated that crypto-native capital will pay for an institutional-grade earnings vehicle that does not require off-ramping to fiat. The new filings extend that logic to a broader audience: BSTBL opens the door for holders of an existing $6.1 billion fund, while BRSRV targets stablecoin treasuries directly.
Larry Fink has framed tokenization as the end-state for all financial assets, and his latest annual letter to investors repeated that view. The asset manager is not treating tokenization as a side bet. Filing for two additional products in a regulated format, with explicit references to stablecoin reserves, shows the firm expects more of the roughly $31 billion tokenized-asset market–itself up about 410% since 2025, per rwa.xyz–to flow into Treasury-backed government securities rather than unsecured commercial paper or offshore structures.
A conventional money-market fund strikes a net asset value once per day after the US market close. Redemption orders submitted by a cut-off time receive same-day pricing, but proceeds may not land until the next business day. A stablecoin issuer managing a multi-billion-dollar peg needs intraday liquidity to handle large redemptions or arbitrage flows. A tokenized share class settles at block times, turning the fund into a near-real-time liquidity tool. That reduces the need for a separate liquidity buffer sitting idle in a bank account.
For the stablecoin market, the operational shift is meaningful. Issuers currently park reserves across bank deposits, Treasury bills held at custodians, and overnight repos. Each of those requires traditional banking hours and multiple intermediaries. Putting the reserve directly on-chain, inside a share that represents a claim on short-term government paper, collapses the number of steps between a redemption request and the return of dollars to a user’s wallet. Under a regulatory framework that mandates real-time redeemability, that infrastructure becomes a competitive requirement.
Three friction points could cap how quickly these tokenized shares accumulate assets. First, Ethereum gas costs can spike during periods of high network activity, making frequent small transactions expensive. BlackRock would need to batch subscriptions and redemptions efficiently–as it already does with BUIDL–but the cost of entry and exit still matters for smaller stablecoin projects. Second, identity and compliance checks remain a bottleneck. The funds will operate under Rule 506(c) of Regulation D, which limits sales to accredited investors and requires the issuer to take reasonable steps to verify that status. That verification process still runs on off-chain rails. Third, the Genius Act has not yet passed, and without it, the regulatory distinction between a bank-issued stablecoin and a tokenized MMF share may remain ambiguous for enforcement purposes.
If the Genius Act advances through committee and floor votes, the deadline for compliant reserve arrangements crystallizes. Stablecoin issuers will need to show regulators a reserve structure that can meet the bill’s liquidity requirements. BlackRock’s filings offer a ready-made option. A single large stablecoin announcing a reserve mandate shift into BRSRV would immediately validate the product and likely pull in followers. The BUIDL experience shows that once one large on-chain treasury fund achieves scale, others follow because the share token becomes a de-facto benchmark for yield and liquidity. Rising stablecoin market capitalisation–now well above $160 billion–creates a growing addressable base of capital that needs a home.
The initial asset levels of BRSRV and the tokenized BSTBL shares will be the first concrete marker. Because the filing documents do not yet specify a launch date or seed capital, investors will watch for the first on-chain transactions to track take-up. A swift climb to several hundred million dollars in combined AUM would indicate that stablecoin issuers are using these vehicles for reserve management, not just as a marketing signal. Beyond AUM, the number of distinct blockchain networks on which BRSRV ultimately deploys will signal how aggressively BlackRock intends to capture the multi-chain stablecoin market. A narrow Ethereum-only launch would target the deepest pool of DeFi liquidity; a quick expansion to additional chains would aim at stablecoins domiciled elsewhere.
BlackRock’s stock page shows an Alpha Score of 59, a moderate reading that reflects a balanced risk-reward profile as the firm extends its tokenized product line. The score captures the reality that tokenized MMFs are still a small revenue contributor relative to BlackRock’s $10 trillion-plus AUM, but the strategic direction aligns with a regulatory shift that could make compliant on-chain reserves non-negotiable for large stablecoin issuers.
For crypto-native capital allocators, the new filings sharpen the question of whether they want yield-bearing reserve exposure to be managed by a traditional asset manager with SEC oversight. BlackRock is betting the answer is yes, provided the shares are tradeable on the same rails as the stablecoins themselves. The filings are an infrastructure move; the allocation decisions that determine whether these vehicles follow BUIDL’s growth curve are now the variable to watch.
Drafted by the AlphaScala research model and grounded in primary market data – live prices, fundamentals, SEC filings, hedge-fund holdings, and insider activity. Each story is checked against AlphaScala publishing rules before release. Educational coverage, not personalized advice.