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Six Republican senators sent a letter to the Federal Reserve, FDIC, and OCC on May 27 demanding that regulators overhaul the capital rules that govern how banks interact with Bitcoin and other digital assets. The core complaint: the current framework makes it financially absurd for any bank to touch crypto.
The letter, spearheaded by Senator Cynthia Lummis, targets the Basel Committee on Banking Supervision’s 1,250% risk weight applied to bank holdings of digital assets. In English: that risk weight means banks must hold capital equal to 100% of their Bitcoin exposure. If a bank wants to hold $10 million in Bitcoin on its balance sheet, it needs to set aside $10 million in capital reserves just to do so.
The senators called this a “blanket penalty” and a “de facto ban.”
What the senators want
The letter pushes for what the senators describe as a “risk-based, technology-neutral capital framework” for banks’ on-balance-sheet holdings of digital assets. The idea is straightforward: assess crypto the same way you’d assess any other asset class, based on its actual risk profile rather than slapping it with a punitive multiplier.
Lummis and her colleagues pointed to a March 2026 interagency clarification as evidence that regulators are already moving in this direction. That guidance aligned capital treatment for tokenized securities with the treatment of their underlying assets. If a tokenized Treasury bond is backed by an actual Treasury bond, it gets the same capital treatment as the bond itself.
The senators want that same logic extended to a broader range of digital assets, including Bitcoin. Their argument is that current treatment doesn’t reflect any genuine risk assessment. It reflects institutional caution that has hardened into policy.
Fed Vice Chair Bowman has previously stated that US regulators are “not adopting those Basel risk weights” because they are unrealistic.
The Basel backdrop and the CLARITY Act
The Basel Committee itself appears to be reconsidering its stance. In November 2025, the committee announced a review of its standards for crypto asset exposures.
The senators’ letter also arrives alongside legislative momentum. The CLARITY Act, designated H.R. 3633, seeks to expand banks’ authority in digital asset activities. That includes custody services, trading, and other functions that traditional financial institutions have largely been locked out of. The senators emphasized in their letter that proper guidance from regulators is essential for these activities to proceed responsibly.
What this means for investors
If the capital rules change in the direction these senators are pushing, the barrier to institutional Bitcoin adoption drops substantially. Banks wouldn’t need to set aside dollar-for-dollar capital reserves just to hold crypto on their balance sheets.
Investors should watch three things: whether the Fed, FDIC, and OCC issue a formal response to the senators’ letter, how the Basel Committee’s review progresses through the rest of 2026, and whether the CLARITY Act gains traction beyond the committee stage.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
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