BlackRock tokenizes $6.1B Treasury fund

Treasury funds are one of the most boring products in finance — and that is exactly why this matters. They are cash parking lots. They hold short-dated government paper. They are supposed to be stable, liquid, and predictable. BlackRock just filed to put one of those products on Ethereum, which means the tokenization story is moving out of crypto demos and into the machinery institutions actually use. ### What did BlackRock actually file? On May 8, 2026, BlackRock filed with the SEC for “OnChain Shares” tied to the BlackRock Select Treasury Based Liquidity Fund, or BSTBL. That is an existing Treasury-focused liquidity fund inside BlackRock Liquidity Funds. The filing says the onchain share class would live alongside the normal share classes, not replace them. In plain English, BlackRock wants the legal fund wrapper to stay familiar while the ownership record moves onto blockchain rails. (sec.gov) ### What sits inside this fund? Very short-term U.S. government paper. The prospectus language for the underlying fund says it invests in Treasury securities with maturities of 93 days or less, plus overnight repo backed by Treasuries. That makes this basically a tokenized cash-equivalent product, not a speculative crypto vehicle. The appeal is simple — stablecoin holders can potentially move from idle digital dollars into something that throws off Treasury yield. (sec.gov) ### Is this the same thing as BUIDL? No — but it rhymes. BUIDL is BlackRock’s existing tokenized Treasury product, launched with Securitize in 2024, and it has grown to about $2.44 billion in assets as of May 11, 2026. The new filing is different because it attaches an onchain share class to a much larger existing fund with about $6.1 billion in assets. That is a bigger statement. It says tokenization is no longer just for a purpose-built crypto-native sleeve. (sec.gov) It can be bolted onto mainstream cash products too. ### Why file a second fund too? Because BlackRock is not just tokenizing one fund — it is building an intake pipe for stablecoin money. In a separate May 8 filing, BlackRock also registered the BlackRock Daily Reinvestment Stablecoin Reserve Vehicle with OnChain Shares. Even the name gives the game away. The target user is someone already sitting in stablecoins who wants yield without fully exiting the onchain world. (app.rwa.xyz) ### Why does Ethereum matter here? Because Ethereum is where a lot of tokenized Treasury activity already lives. RWA.xyz shows tokenized U.S. Treasuries at about $15.29 billion as of May 11, 2026. So BlackRock is not inventing a market from scratch. It is choosing the chain with the deepest existing capital-markets gravity. Basically, this is less “bold experiment” and more “join the venue where the buyers already are.” (sec.gov) ### How does Visa fit into the same week? Visa expanded its stablecoin settlement pilot on April 29 to five more blockchains — including Polygon — bringing the total to nine and pushing the program to a $7 billion annualized run rate. That matters because BlackRock is working on the asset side while Visa is working on the money-movement side. One is tokenizing yield-bearing cash management. The other is making stablecoin settlement more usable for payments firms. (app.rwa.xyz) Those rails are starting to point at each other. ### And Kraken buying Bitnomial? Same pattern — institutional plumbing. Kraken’s parent, Payward, said the Bitnomial deal gives it a fully CFTC-licensed derivatives foundation in the U.S. That is a different business from tokenized Treasuries, but the theme is the same. Big firms are not treating crypto infrastructure like a side quest anymore. They are buying or building regulated pieces they can plug into core finance. (corporate.visa.com) ### So what is the catch? The tech is the easy part. The hard part is that money-market funds, securities law, transfer restrictions, and blockchain settlement all run on different assumptions. BlackRock’s filings are still subject to SEC effectiveness timelines — 60 days for the BSTBL filing and 75 days for the stablecoin reserve vehicle filing. So this is not “24/7 Treasury trading is here today.” It is BlackRock laying legal track for it. (blog.kraken.com) ### Bottom line? This is what tokenization looks like when it grows up. Not memes. Not vague “real-world asset” talk. A giant asset manager is trying to put one of finance’s dullest, most trusted products onchain — because that is where a meaningful chunk of digital cash now lives. (sec.gov)