1,250% Risk Weight Rule — US Banks Face Bitcoin Lockout
By John Nada·Jun 6, 2026·4 min read
US banks face Bitcoin exclusion due to a 1,250% risk rule. Senators push for a recalibrated framework to enable effective crypto engagement.
On May 27, a group of Republican senators sent an urgent letter to Federal Reserve Vice Chair for Supervision Michelle Bowman, FDIC Chair Travis Hill, and Comptroller of the Currency Jonathan Gould. They warned that the Basel Committee's 1,250% risk weight for digital assets like Bitcoin stands as a formidable barrier to banks holding crypto on their balance sheets.
This regulatory framework translates into an economic roadblock, effectively doubling the financial requirements for banks wanting to hold Bitcoin. Under the current rule, a bank holding $100 million in Bitcoin must have the same amount in capital, with the requirement increasing to $150 million for banks with higher internal capital targets. The economics of custody or trading typically do not justify such steep requirements, leaving banks in a challenging position.
The Senate's Banking Committee has taken proactive measures by advancing the CLARITY Act, aimed at providing banks more statutory leeway in digital markets. However, as CryptoSlate noted, granting permission without addressing the capital efficiency issue results in a hollow victory for banks. The letter from the senators seeks to bridge this gap, urging regulators to develop a new capital framework for on-balance-sheet digital asset activities.
The Basel Committee's 1,250% risk weight acts almost as a de facto ban on banks holding crypto. A 1,250% risk weight multiplied by the 8% minimum capital requirement equals a 100% capital allocation. This means that a bank would need to allocate $100 million in capital to hold $100 million in Bitcoin. For banks maintaining internal CET1 targets above the regulatory floor, the burden is even greater, potentially requiring $150 million in capital.
Since early 2025, US regulators like the OCC, FDIC, and the Federal Reserve have moved towards a more permissive stance on crypto activities. The OCC, for instance, reaffirmed in March 2025 that national banks could engage in crypto custody, stablecoin-related activities, and distributed-ledger payment functions, while also removing the prior supervisory non-objection requirement. The FDIC and the Fed made similar moves to ease restrictions on permissible crypto activities.
Despite these shifts, the capital treatment for holding Bitcoin has remained untouched. The senators' letter emphasizes how legislative permission without the necessary capital efficiency renders banks structurally unable to leverage digital assets. Even with the ability to hold Bitcoin, banks are stymied by the capital charge that makes the position uneconomic from the outset.
The March 2026 interagency FAQ on tokenized securities offered a glimmer of hope, suggesting that eligible tokenized securities should receive the same capital treatment as their non-tokenized counterparts. The senators argue that this technology-neutral logic should extend to native digital assets, such as Bitcoin, where the asset's volatility and operational risks are quantifiable and could support a calibrated framework.
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The prudential case for the rule is rooted in the 2023 joint statement by the Fed, FDIC, and OCC, which highlighted risks such as price volatility, legal uncertainty over custody and ownership rights, contagion from exchange failures, and governance weaknesses in crypto networks. The Basel standard was designed to mitigate these risks, especially after the 2022 crypto market collapse exposed vulnerabilities in interconnected institutions.
The Basel Committee's standard reflects a judgment that Bitcoin's risk profile is fundamentally different from traditional assets on bank balance sheets. However, the senators argue that these risks are measurable and that a calibrated capital framework could address them effectively. The Basel Committee agreed to expedite a review of its cryptoasset standard by November 2025, with progress reported in February 2026.
This review is crucial as it presents an opportunity to potentially recalibrate the treatment of crypto risks. A coalition of major financial industry groups wrote to Basel in August 2025, arguing that the current standard makes meaningful bank participation in crypto markets uneconomical and calling for revisions.
Two potential pathways lie ahead. If regulators propose a calibrated framework, the capital requirement for $100 million Bitcoin exposure could significantly decrease, possibly to $8 million-$36 million under a 100%-300% risk-weight band. This would enable banks to transition from mere custodians to active market players, facilitating market-making and structured products, and ultimately increasing institutional liquidity.
Conversely, if the 1,250% risk weight remains, banks may continue to shy away from direct Bitcoin exposure, focusing instead on custody and settlement while allowing ETFs and nonbanks to handle the majority of transactions. The current capital restrictions have already led to $4.4 billion in outflows from US-traded spot Bitcoin ETFs, illustrating how market movements are being redirected away from bank balance sheets.
The senators' letter underscores the political cost of inaction as Congress works on the frameworks that will govern digital asset markets for the next decade. Legal authorization to hold Bitcoin means little if the capital charges render such holdings economically unfeasible from day one.