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Crypto glossary

What Is the GENIUS Act? The US Stablecoin Law Explained

The US federal law setting rules for payment stablecoins — who may issue them, what reserves must back them, and how issuers are supervised. It was signed into law on 18 July 2025.

The GENIUS Act — the Guiding and Establishing National Innovation for U.S. Stablecoins Act (S. 1582) — is the first US federal law written specifically for payment stablecoins: tokens designed to hold a stable value against the dollar and be used for payments and settlement. The House passed it on 17 July 2025 and it was signed into law the following day.

What the law does

Timing

The law does not take full effect on signing. It becomes effective on the earlier of 18 months after enactment — 18 January 2027 — or 120 days after regulators issue final implementing rules. Through 2026 the implementing rules moved through proposal and public comment: our coverage in August 2026 reported the US Treasury proposing rules on when stablecoin issuers need a US licence, with a 60-day comment period, while the January 2027 date held.

How it relates to other rules

The GENIUS Act covers stablecoins only. The broader question of how other crypto-assets are classified and which US regulator oversees their markets is the subject of separate market-structure legislation, most prominently the CLARITY Act. In the EU, the comparable stablecoin rules sit inside MiCA.

In MoonWire analysis

Our stablecoin hub and regulation hub track GENIUS Act rulemaking as it is reported, dated so readers can see what was known when.

Further reading

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