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A stablecoin is a digital asset designed to maintain a steady value by pegging its price to another asset, most commonly a fiat currency like the U.S. dollar. Stablecoin reserve requirements are the rules determining the assets an issuer must hold to back up every stablecoin it puts into circulation.
Major jurisdictions with stablecoin reserve requirements include the United States under the GENIUS Act and the European Union under its MiCA regulation. Under both stablecoin regimes, reserves must contain 1:1 backing and be restricted to low-risk liquid assets. They must be held separate from the issuer’s corporate funds, and their composition must be reported publicly on a regular basis.
In this article, we'll cover what stablecoin reserves are, what the current regulations require across the major jurisdictions, and why those requirements are important.
What Are Stablecoin Reserves?
A stablecoin reserve is the pool of assets an issuer holds to back the stablecoin tokens it has issued. When someone sends $1 to an issuer and receives one stablecoin token, that dollar goes into the reserve pool. The token represents a claim to one dollar against that pool.
Issuers may convert the dollars they receive into other assets in order to generate returns. Most of the reserve should stay in the same denomination as the peg to avoid currency risk, and be held with counterparties unlikely to default to avoid credit risk. It should also be liquid and short-duration so that assets can be sold quickly in case redemption demand spikes.
The purpose of the reserve is to honor redemptions in order to maintain the peg. A holder sends a stablecoin token back to the issuer, and the issuer pays out a dollar. This mechanism holds the stablecoin peg in place. If the token trades below peg, arbitrageurs can buy it at a discount and redeem at par with the issuer. This pushes the token price back to the peg.
What Do Reserve Requirements Actually Cover?
Frameworks for stablecoin reserve requirements address four things:
- Composition: Which assets qualify as a reserve asset, and how much must be held.
- Segregation: How reserves are legally set apart from the issuer's corporate funds.
- Custody: How reserves are custodied in practice.
- Disclosure: What aspects of the reserve need to be reported publicly on a regular basis, and who verifies the report.
United States: The GENIUS Act
The GENIUS Act is the U.S. federal law that creates a regulatory framework for dollar-backed stablecoins. Signed into law in 2025, it is the first federal statute to govern stablecoin issuance nationally.
Under the GENIUS Act, issuers must maintain reserves that back outstanding stablecoins on at least a one-to-one basis. Reserves are restricted to the following low-risk, highly liquid cash and cash-equivalent instruments:
- Bank and central bank deposits.
- Short-term U.S. Treasury bills.
- Reverse repurchase agreements (fully collateralized by short-term U.S. Treasuries).
- Government money market funds.
Reserves must then be held in segregated, bankruptcy-remote accounts, strictly distinct from the issuer's corporate operational funds. Stablecoin holders receive first-priority claims on reserve assets outside the bankruptcy estate, alongside a super-priority claim on corporate assets to cover any reserve shortfalls before other creditors are paid. In practice, this means that even if the company fails, every holder of their stablecoin should be able to redeem their holdings without problem.
Reserves must also be held by qualified custodians subject to direct state or federal banking oversight. Issuers must also publish monthly reports of reserve asset composition certified by the CEO and CFO and examined by an independent registered public accounting firm.
An issuer with more than $50 billion in outstanding issuance (meaning they have that much value circulating in their stablecoin) must also publish audited annual financials under GAAP, unless it already reports to the SEC as a listed company, as Circle does.
European Union: MiCA Regulation
MiCA has governed stablecoins across all 27 member states of the EU since 2024. Similar to the GENIUS Act, MiCA requires issuers to maintain reserves that back outstanding stablecoins on at least a 1-to-1 basis at all times. Reserves must only comprise the following:
- Bank and central bank deposits.
- Short-term sovereign bonds of EU member states.
- Reverse repurchase agreements (fully collateralized by eligible sovereign debt).
- Qualified money market funds.
MiCA’s provisions go beyond the GENIUS Act. At least 30% of the reserve must be held as bank and central bank deposits, rising to 60% for tokens designated as “significant” by the European Banking Authority.
Segregation and custody rules track the U.S. approach closely. Reserves must sit apart from the issuer's own assets, and in the hands of qualified custodians. Tokens designated as significant face an independent reserve audit every six months.
|
GENIUS Act (U.S.) |
MiCA in (E.U.) |
|
|
Minimum backing |
≥ 1:1 at all times |
≥ 1:1 at all times |
|
Composition |
Cash and cash equivalents |
Cash and cash equivalents |
|
Bank deposits ratio |
N/A |
≥ 30% (or 60% for significant tokens) |
|
Segregation |
In bankruptcy-remote accounts, separate from corporate funds |
In bankruptcy-remote accounts, separate from corporate funds |
|
Custody |
Qualified custodians |
Qualified custodians |
|
Attestation Frequency |
Monthly |
N/A |
|
Audit Frequency |
Annually for ≥ $50 billion in outstanding issuance (unless already SEC-reporting) |
Semiannually for significant tokens |
How Are Stablecoin Reserves Verified?
Regulations require stablecoin reserves to be attested and audited. Although similar, these two processes are not identical:
- An attestation is a point-in-time check. An accountant confirms what the reserve held on one particular date and that it fully backed the tokens outstanding. What happened on the other days of the period falls outside its scope.
- Audits work differently. They cover a full reporting period, examining the reserve management systems, and they carry a higher standard of assurance.
In 2021, the CFTC fined Tether $41 million over claims that USDT was fully backed by dollars between 2016 and 2019, when for parts of that period it wasn't. That case illustrates why reserve verification needs to be regulated.
Why Are Reserve Requirements Important?
Before these regulatory frameworks existed, a stablecoin could be backed by almost anything, and holders often had no way to verify such information. Some issuers held corporate bonds, loans to affiliated companies, and other risky assets such as cryptocurrencies. Others held fractional reserves or no reserves at all and attempted to maintain the peg through algorithms and market confidence.
TerraUSD was an algorithmic stablecoin with no exogenous reserves. The stablecoin held its peg through a mint-and-burn relationship with an endogenous token, LUNA. Its peg failed permanently in May 2022 when the algorithmic peg mechanism inverted into a death spiral, erasing $18 billion of value within days.
Its failure in May 2022 was one of the major reasons that prompted reserve requirements to be moved onto legislative agendas worldwide. With stablecoin adoption surging, governments were keen to avoid any further collapses like the TerraUSD incident.
Current regulations effectively ban risky reserve management practices. Practices such as fractional reserves and reserves with endogenous assets are effectively prohibited.
Do Reserve Requirements Make a Stablecoin Safe?
While reserve requirements reduce certain risks of a stablecoin, they don't make it safe from everything.
While the required reserve composition is low-risk assets, they are not risk-free. For instance, a reserve can be held as cash in a bank account. FDIC insurance covers that account up to $250,000, but the limit applies to the issuer as the depositor, not to each token holder individually. If a bank holding a stablecoin issuer’s reserves collapses, they may incur significant losses.
In March 2023, Circle disclosed that $3.3 billion of USDC's reserves, roughly 8% of the total, were held at Silicon Valley Bank (SVB), which had just collapsed. A few days later, the U.S. Federal Reserve, FDIC, and Treasury then invoked a systemic risk exception, guaranteeing all deposits at SVB in full.
Had the agencies not stepped in, USDC would have been left short of full backing, and USDC holders could have faced a haircut. USDC traded as low as about $0.87 over that weekend before the government guarantee restored the peg.
That episode shows some composition and custody risk remains even where it has been mitigated. Disclosure requirements exist so the remaining risk is at least visible.
Frequently Asked Questions
1. What are stablecoin reserve requirements?
They are the rules setting out what assets a stablecoin issuer must hold against every stablecoin token in circulation. They also dictate how those assets are custodied and publicly reported. The two major regulatory frameworks for stablecoin reserve requirements are the GENIUS Act in the United States and MiCA in the European Union.
2. What assets can back a stablecoin?
Cash and cash equivalents. Both the GENIUS Act and MiCA limit reserves to bank and central bank deposits, short-term government debt, reverse repurchase agreements, and money market funds. MiCA adds a further constraint, requiring bank deposits to make up at least 30% of the total reserve, or 60% for tokens designated as "significant."
3. What makes an asset suitable for a stablecoin reserve?
First, the asset has to hold its value against the pegged currency. Currency risk rules out commodities, company shares, and instruments denominated in other currencies. Credit risk rules out corporate bonds, commercial paper, and loans to affiliated companies.
Second, it has to be convertible into the pegged currency quickly and at close to full value. That takes two things. The asset needs to be liquid, so that the market can absorb a large sale on short notice. It also needs a short enough duration that its price barely moves when interest rates shift. This rules out long-term government bonds.
4. Can a stablecoin issuer run a fractional reserve?
No. Both the GENIUS Act and MiCA require backing of at least 1:1 at all times. That is the structural difference between a stablecoin issuer and a bank, which lends out a portion of the deposits it takes in.
5. What happens to the stablecoin reserve if the issuer goes bankrupt?
Under the GENIUS Act, reserve assets sit outside the bankruptcy estate. Stablecoin holders receive first-priority claims on reserve assets, alongside a super-priority claim on corporate assets to cover any reserve shortfalls before other creditors are paid. MiCA keeps the reserve separate from the issuer's estate as well, but gives stablecoin holders no equivalent claim on corporate assets.
6. How are stablecoin reserves verified?
Under the GENIUS Act, a permitted stablecoin issuer publishes a monthly attestation of reserve composition, examined by an independent registered public accounting firm. Issuers with more than $50 billion in outstanding issuance must also publish annual audited financial statements, unless they already report to the SEC as a listed company. Under MiCA, tokens designated as significant undergo a full independent audit of the reserve every six months.
Disclaimer: This article was produced with the assistance of OpenAI’s ChatGPT/xAI’s Grok and reviewed and edited by our editorial team.
© 2026 The Block. All Rights Reserved. This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.