US senators press regulators on crypto capital

TLDR

A group of US Republican senators is pushing banking regulators to ease what they call punitive capital rules on banks crypto exposures.

1. Senators led by Cynthia Lummis sent a letter attacking the Basel Committees 1,250% risk weight on many digital assets and urging tech?neutral, risk?based capital rules.
2. The current framework effectively makes it uneconomic for most US banks to hold spot crypto on balance sheet, limiting regulated custody, lending, and trading services.
3. How regulators respond and whether the CLARITY Act advances this year will shape if large US banks can move meaningfully into digital-asset markets.

Deep Dive

1. What Senators Are Asking For

Senator Cynthia Lummis and five other Republican senators sent a May 27 letter to Federal Reserve Vice Chair for Supervision Miki Bowman, FDIC Chair Travis Hill, and Comptroller of the Currency Jonathan Gould. The letter criticizes the Basel Committee on Banking Supervisions longstanding 1,250% risk weight for many crypto assets, arguing it amounts to a de facto ban on banks holding crypto and is not based on a calibrated assessment of digital asset risk.

They ask US regulators to adopt technology?neutral capital rules that reflect both the risks and opportunities of digital assets and to extend the recent guidance that tokenized securities should get the same capital treatment as traditional securities to broader digital asset activities. This push is documented in multiple reports on the senators letter and its arguments about the Basel capital treatment for crypto.

2. Why Capital Treatment Matters For Crypto

Bank capital rules determine how much loss?absorbing equity a bank must hold against each 1 dollar of exposure; a 1,250% risk weight can mean holding roughly 1.25 dollars of capital per 1 dollar of crypto exposure, which is prohibitive compared with many traditional assets. Senators argue this keeps most regulated US banks from offering on?balance?sheet crypto services, even as demand for insured, large?bank custody and financing grows.

If regulators move toward more granular, risk?sensitive weights, it could open the door for big banks to custody Bitcoin (BTC), Ethereum (ETH), and stablecoins, lend against them, and participate more directly in tokenization and payments. That would likely deepen liquidity and institutional participation, but also more tightly link crypto markets to the regulated banking system.

3. Next Steps: CLARITY Act And Regulatory Signals

The timing of this pressure is tied to the CLARITY Act, a broad US crypto market?structure bill that would define SEC versus CFTC jurisdiction and explicitly allow banks to use digital assets and blockchain for payments, lending, custody, and trading. Analysts at JPMorgan have warned that the legislative window in 2026 is narrowing as midterm election politics intensify, particularly amid disputes over stablecoin yield and other contentious provisions.

Near term, key signals include testimony from Bowman, Hill, and Gould before Congress, any public comments on revisiting Basel-aligned crypto capital rules, and whether Senate leaders can move the CLARITY Act to a floor vote before the political calendar closes. If the bill stalls and regulators do not soften capital treatment, large US banks will likely remain cautious about direct crypto exposure, leaving more activity with non?bank and offshore venues.

Conclusion

Senators are trying to shift crypto from being treated as unacceptably risky in bank capital rules to being handled like other financial exposures with calibrated risk weights. If regulators and lawmakers agree, it could gradually unlock more bank participation in crypto custody, lending, and tokenization; if they resist or timelines slip, the center of gravity for crypto activity will stay with specialized platforms rather than the traditional US banking system.