Answers Stablecoins & yield

What backs a stablecoin?

Updated August 1, 2026 · Zion Labs

Answer

It depends entirely on the issuer, and "backed 1:1" collapses three separate questions into one phrase: what the reserves are made of, how often and how rigorously that is verified, and whether you personally hold a legal right to redeem at par. Under the US GENIUS Act a permitted payment stablecoin issuer must maintain identifiable reserves on at least a 1-to-1 basis, drawn from a defined list — US currency, balances at a Federal Reserve Bank, demand deposits at insured institutions, short-dated Treasury bills, Treasury repo and reverse repo, and qualifying money market funds — and must publish the reserve composition monthly with the report examined by a registered public accounting firm. In the EU, MiCA requires the funds behind an e-money token to be invested in safe, low-risk assets so that holders can redeem at any time at par.

Nuances and considerations

  • Reserve composition is not one thing. Cash in an insured bank account, overnight Treasury repo and a 90-day Treasury bill behave differently under stress even though all three sit inside the same permitted list. What matters in a redemption run is how fast the assets convert to dollars without a loss, so read the composition, not the headline.
  • A monthly examination is not an audit of the issuer. The GENIUS Act requires the monthly reserve report to be examined by a registered public accounting firm. That is a recurring check on a specific report — valuable, and narrower than a financial statement audit covering the whole company over a period.
  • The US framework is not fully in force yet. Section 13 required the primary federal regulators to issue implementing regulations within a year of enactment; that deadline passed without final rules, and the Act takes effect on the earlier of 18 January 2027 or 120 days after final rules are issued. A great deal of published material describes protections that are still being written — check what is actually in effect on the date you are reading.
  • A redemption right belongs to whoever holds it, which may not be you. If you hold a stablecoin inside an app, you may hold a claim on the app rather than the token itself, and the redemption right against the issuer may sit with the platform. That distinction decides what you can do when you most want your money.
  • Not every token marketed as a stablecoin is a fiat-reserve token. The stabilisation mechanism is a design choice, and some designs hold no fiat reserves at all. Read the issuer’s own description of the mechanism before applying any of the above.
  • None of this is insurance. The FDIC does not insure crypto assets and does not protect against the failure of a non-bank company. Reserves held at an insured bank protect the issuer’s reserve account against that bank’s failure — a different event from the issuer’s own.

Sources

  1. GENIUS Act, Public Law 119-27 — SEC. 4(a)(1) and SEC. 4(a)(3) — U.S. Government Publishing Office Supports: The requirement to maintain identifiable reserves backing outstanding payment stablecoins on at least a 1-to-1 basis; the enumerated list of permitted reserve assets; and the monthly certification of reserve composition with examination of the report by a registered public accounting firm.
  2. European crypto-assets regulation (MiCA) — summary of EU legislation — EUR-Lex, Publications Office of the European Union Supports: That MiCA distinguishes e-money tokens and asset-referenced tokens, and that issuers require authorisation, with EMT issuers authorised as credit or e-money institutions.
  3. Asset-referenced and e-money tokens (MiCA) — European Banking Authority Supports: The EU reserve and safeguarding regime for asset-referenced and e-money tokens, including the requirement that funds be invested in secure, low-risk assets supporting redemption at par.
  4. US regulators miss GENIUS Act's one-year deadline for final stablecoin rules — The Block Supports: That section 13 required primary federal payment stablecoin regulators to issue implementing regulations within one year of enactment, that this deadline passed without final rules, and that the framework takes effect on the earlier of 18 January 2027 or 120 days after final rules.
  5. Fact Sheet: What the Public Needs to Know About FDIC Deposit Insurance and Crypto Companies — Federal Deposit Insurance Corporation Supports: That FDIC deposit insurance does not apply to crypto assets and does not protect against the failure of a non-bank entity.

This is a question where the correct answer is a description of three mechanisms, and every short answer picks one and drops the others.