The letter targets a specific provision in the OCC's February 25 Notice of Proposed Rulemaking, a 376-page document implementing the GENIUS Act (Guiding and Establishing National Innovation for U.S. Stablecoins Act). That law, signed on July 18, 2025, created the first federal regulatory framework for payment stablecoins in the United States. As part of its rulemaking, the OCC asked for public comment on whether tokenized reserve assets should be capped at 20% of total holdings. BlackRock's response: no.

The firm has a direct commercial interest in the outcome. Its BUIDL fund, formally known as the BlackRock USD Institutional Digital Liquidity Fund, holds $2.58 billion in assets under management as of this month, making it the second-largest tokenized Treasury product globally behind Circle's USYC at $2.91 billion. BUIDL tokens represent on-chain claims to U.S. Treasury holdings, precisely the kind of instrument stablecoin issuers could use as reserve backing. The fund has been tradable on Uniswap since February 2026, accepted as collateral on Binance and OKX since November 2025, and deployed across Ethereum, Solana, BNB Chain, and multiple Layer 2 networks. A 20% ceiling would require issuers to keep the vast majority of their reserves in traditional, off-chain form, which would significantly limit BUIDL's role in the stablecoin ecosystem.

Beyond opposing the cap, BlackRock also urged the OCC to expand what qualifies as a permitted reserve asset. Under the current proposal, eligible assets include U.S. currency, Federal Reserve account balances, insured demand deposits, Treasury bills with maturities of 93 days or fewer, certain reverse repurchase agreements, government money market funds, and tokenized versions of those same instruments. Crypto assets, including stablecoins themselves, are explicitly excluded. BlackRock's letter argues that list should be wider. Verse Press has not independently reviewed the full letter filed in the OCC's public docket.

BlackRock is not the only institution that responded before the May 1 comment deadline. The Bank Policy Institute coordinated a joint letter from multiple financial trade associations, warning that the implementation details of the GENIUS Act "could have significant effects on financial stability, credit creation, consumer protection and the broader economy." The Brookings Institution also submitted a public comment on OCC implementation.

In a separate move, BlackRock launched a product called the BlackRock Select Treasury Based Liquidity Fund, a money market fund specifically structured to serve as GENIUS Act-compliant reserve infrastructure for stablecoin issuers. Jon Steel, speaking for the firm, said the product "positions BlackRock as one of the reserve asset managers of choice for the digital payments ecosystem."

The firm's broader stake in this debate is substantial. BlackRock manages approximately $65 billion in stablecoin reserves and around $80 billion in digital asset exchange-traded products. Its cash management business crossed $1 trillion in assets for the first time in Q3 2025. The firm was also an early backer of Circle, the issuer of USDC, through a $400 million funding round in 2022.

The stakes extend well beyond U.S. markets.

The total tokenized real-world asset market, measured by on-chain distributed value, sits at $30.82 billion as of today, up more than 5% over the past 30 days, with more than 740,000 holders globally. A broader measure that includes the represented value of underlying assets puts the figure at $437.62 billion; readers familiar with the wider RWA discourse should note that the $30.82 billion figure reflects the narrower on-chain metric. The design of reserve rules in the United States directly shapes how that market develops, particularly in regions where stablecoin use is driven by necessity rather than speculation. It is also worth noting that the GENIUS Act creates a two-tier structure: issuers with more than $10 billion in stablecoins in circulation fall under OCC oversight, while smaller issuers operate under a separate framework, so the stakes of this specific rulemaking fall most directly on the largest players.

In Sub-Saharan Africa, stablecoins account for 43% of all crypto transaction volume, the highest share of any region in the world, reflecting demand for dollar-denominated savings amid local currency volatility. On-chain value in the region grew 52% year-on-year between July 2024 and June 2025. Kenya, Nigeria, and South Africa have each introduced national stablecoin frameworks, and Nigeria's peer-to-peer stablecoin market ranks among the deepest globally. At the same time, regional central banks and currency sovereignty advocates are monitoring the GENIUS Act closely, wary that expanded dollar-denominated stablecoin infrastructure could function as a vehicle for extending U.S. monetary influence in markets that have historically sought monetary independence.

In South Asia, crypto transaction volumes reached roughly $300 billion in the first seven months of 2025, an 80% increase from the prior year. Pakistan ranks third globally in crypto adoption intensity, and remittance corridors into South Asia are among the most active in the world. World Bank data shows a conventional $500 transfer from the United States to Pakistan costs around 3.5% in fees; stablecoin-based transfers reduce that cost to near zero. India adds a more complicated dimension: it ranks first globally in crypto adoption by raw volume, yet its domestic regulatory environment imposes a 30% capital gains tax on crypto profits and a 1% tax deducted at source on transactions, a dual tension between widespread grassroots use and official policy constraints that shapes how any changes to U.S. reserve rules will land in the region.

For developers and protocol builders in Lagos, Nairobi, Karachi, or Dhaka, the outcome of this rulemaking will determine how reserve assets can move on-chain. If tokenized Treasuries gain unrestricted eligibility, it opens the path toward stablecoins with fully on-chain, auditable reserves and tighter integration with decentralized finance protocols. A 20% cap would push issuers back toward off-chain custodial models, reducing transparency and limiting interoperability with DeFi infrastructure.

The OCC's comment period has now closed. The agency must review submissions, including BlackRock's, before publishing a final rule. No timeline for that decision has been announced. A parallel rulemaking from the FDIC, covering GENIUS Act requirements for institutions it supervises, was issued on April 7, 2026, and remains in progress. Until final rules are published, the 20% cap remains a question on the table, not settled policy.