The GENIUS Act: How Treasury’s First Stablecoin Rules Reshape a $319 Billion Market

Two Rules That Rewrite the Stablecoin Playbook

Nine months after signing the GENIUS Act into law, the U.S. Treasury turned the legislation’s broad mandates into actionable regulation. In the first two weeks of April 2026, Treasury released two proposed rules that together form the operational backbone of America’s first comprehensive stablecoin framework.

The first, published on April 1, defines when a state-level regulatory regime qualifies as “substantially similar” to the federal framework, opening a path for smaller issuers to remain under state oversight. The second, issued on April 8 jointly by the Financial Crimes Enforcement Network (FinCEN) and the Office of Foreign Assets Control (OFAC), imposes anti-money laundering and sanctions compliance obligations that treat stablecoin issuers as financial institutions under the Bank Secrecy Act.

Together, the rules affect every permitted payment stablecoin issuer (PPSI) operating in or serving customers in the United States, in a market that hit an all-time high of $318.6 billion on April 11, 2026.

The State Path: Uniform Standards, Calibrated Flexibility

The GENIUS Act created a two-tier oversight model. Issuers with more than $10 billion in outstanding stablecoins fall under direct federal supervision by the Office of the Comptroller of the Currency (OCC). Those below the threshold can operate under state regulators, but only if their state’s regime meets Treasury’s “substantially similar” standard.

Treasury’s proposed rule splits the requirements into two categories. “Uniform” requirements must match the federal framework in all substantive respects. These include reserve composition rules mandating 100% backing with high-quality liquid assets such as cash and short-term U.S. Treasuries, a prohibition on rehypothecating reserves, Bank Secrecy Act and sanctions compliance, and a ban on paying interest or yield to holders.

“State-calibrated” requirements give states design discretion on implementation, so long as outcomes are at least as stringent as the federal standard. These cover reserve asset eligibility specifics, liquidity and diversification thresholds, redemption limitations, capital requirements, operational risk management, and permissible activities.

The practical effect is significant. States like New York and Wyoming, which already have advanced digital-asset licensing frameworks, could qualify relatively quickly. Others will need to build or amend their regimes to meet the uniform baseline.

A critical guardrail remains: any state-regulated issuer that crosses the $10 billion threshold has 360 days to transition to federal oversight or stop issuing new stablecoins. A waiver process exists, but issuers must apply within 240 days of crossing the threshold, and approval depends on factors including capital adequacy and the state regulator’s supervisory track record.

Bank-Level Compliance for a Crypto-Native Industry

The joint FinCEN/OFAC rule is where the regulatory weight hits hardest. By classifying PPSIs as financial institutions under the BSA, the rule imports obligations that banks have managed for decades but that most stablecoin issuers have never faced at this scale.

The proposed requirements include establishing and maintaining a formal AML and countering-the-financing-of-terrorism (AML/CFT) program, filing suspicious activity reports (SARs), building technical capabilities to block transactions that violate U.S. law, complying with lawful orders from regulators and law enforcement, and maintaining an effective sanctions compliance program that screens every transaction against OFAC lists.

Treasury Secretary Scott Bessent framed the rule as balancing innovation with national security: “This proposal will protect the U.S. financial system from national security threats without hindering American companies’ ability to forge ahead in the payment stablecoin ecosystem.”

The obligations are described as “tailored and fit for purpose,” scaling with issuer size and complexity. But even the smallest PPSI will need a compliance program, transaction monitoring infrastructure, and the ability to freeze or block flagged transactions in real time.

The Dollar Dominance Strategy

Beyond compliance mechanics, the GENIUS Act serves a geopolitical purpose. By requiring stablecoin reserves to be held predominantly in U.S. Treasuries and cash equivalents, the law creates structural demand for American sovereign debt from a fast-growing asset class. Every dollar of the market’s $319 billion in stablecoins backed by Treasuries is effectively a new buyer of U.S. government bonds.

Foreign stablecoin issuers, including Tether, which operates from El Salvador and commands roughly 58% of the market with $187 billion in USDT, face their own reckoning. The GENIUS Act permits foreign issuers to serve U.S. customers only if Treasury determines their home jurisdiction’s regulatory regime is “compatible” with the U.S. framework. Treasury has until July 18, 2026 to issue rules defining what “compatible” means for foreign regimes.

The competitive landscape is already shifting. Circle’s USDC, headquartered in the U.S. with a strong compliance track record, has grown to approximately $79 billion in market capitalization. The first bank-issued stablecoins could appear by late 2026 or early 2027, creating direct competition with crypto-native issuers.

What Happens Next

The regulatory calendar is aggressive. The OCC’s comment period on its implementation rule closes May 1, 2026. Treasury’s state-regime NPRM has a 60-day comment window. The FinCEN/OFAC AML rule’s comment period runs until approximately June 9, 2026. All regulations must be finalized by July 18, 2026, exactly one year after the law was signed. Full enforcement begins by January 18, 2027, or 120 days after final regulations are published, whichever comes first.

For the stablecoin industry, the message is clear: the era of regulatory ambiguity is over. Issuers that built their businesses in legal gray zones must now build compliance infrastructure that rivals traditional banks, or exit the U.S. market entirely.

Sources & Further Reading

• Treasury Proposes Rule to Implement the GENIUS Act’s Requirements to Counter Illicit Finance — U.S. Department of the Treasury
• Treasury Seeks Public Comment on State-Level Regulatory Regimes NPRM — U.S. Department of the Treasury
• FinCEN/OFAC Proposed AML/CFT Rule for Stablecoin Issuers — Federal Register
• GENIUS Act State-Level Regime Principles — Federal Register
• Treasury Opens a State Path for Smaller Stablecoin Issuers — PYMNTS
• GENIUS Act Implementation Analysis — Sullivan & Cromwell
• Digitalizing Dominance: How the GENIUS Act Reinforces U.S. Dollar Hegemony — Columbia Economic Review