Crypto rules finalized, Bitcoin retreats, Solana upgrades | Weekly recap

In this week’s edition of the weekly recap, US regulators finalized stablecoin rules under the GENIUS Act, Bitcoin lost ground after a sharp reversal in ETF flows, and Solana activated Alpenglow. Corporate Bitcoin financing, institutional custody deals, and Ethereum’s postponed testnet upgrade also shaped crypto.news coverage for Oct. 18–24.

The Office of the Comptroller of the Currency finalized stablecoin regulations on Oct. 21, establishing standards for reserve assets, redemptions, risk management, custody and issuer supervision. The rules take effect Jan. 18, 2027, and cover issuers and related activities under the agency’s jurisdiction.Existing issuers with substantially complete applications pending by the deadline may seek temporary compliance waivers while their submissions undergo review. Anti-money laundering and sanctions provisions remain subject to a separate rulemaking with the Treasury Department. The framework also addresses foreign issuers and transitions from state to federal oversight.

$SOL

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