Stablecoins: Mechanics and Regulation under MiCA

Introduction

Stablecoins have become the backbone of the crypto ecosystem, representing over $150 billion in market capitalization. With MiCA coming into force, Europe is imposing a strict regulatory framework on these assets. This guide explains how the different types of stablecoins work and their new regulatory environment.

What you will learn:

• The stability mechanisms of different stablecoins
• The MiCA classification (EMT, ART)
• Regulatory requirements for issuers
• Implications for European users
• Which stablecoins are authorized in Europe

Table of Contents

1. Understanding stablecoins
2. Types of stablecoins
3. MiCA framework for stablecoins
4. E-money tokens (EMT)
5. Asset-referenced tokens (ART)
6. Algorithmic stablecoins
7. Requirements for issuers
8. Impact on users
9. Stablecoins authorized in Europe
10. FAQ

1. Understanding Stablecoins

True pillars of the crypto ecosystem, stablecoins provide stability and transactional fluidity.

Definition

A stablecoin is a crypto-asset designed to maintain a stable value relative to a reference asset, typically a fiat currency such as the dollar or the euro.

"Stablecoins serve as a bridge between traditional finance and the crypto ecosystem, providing the stability needed for everyday transactions."

Role in the Ecosystem

Core functions:

Market Statistics

Market capitalization (December 2024):

2. Types of Stablecoins

Fiat-backed, crypto-backed, or algorithmic: each mechanism has its own advantages and specific vulnerabilities.

Fiat-Collateralized Stablecoins

Mechanism: Each token is backed 1:1 by reserves in fiat currency or equivalents (Treasury bills, bank deposits).

+---------------------------------------------------------+
|              FIAT-COLLATERALIZED STABLECOIN              |
|                                                         |
|  User                Issuer               Bank          |
|    |                   |                    |           |
|    |  1. Deposits $100 |                    |           |
|    |------------------>|                    |           |
|    |                   |  2. Deposits $100  |           |
|    |                   |------------------->|           |
|    |                   |                    |           |
|    |  3. Receives 100  |                    |           |
|    |<------------------|                    |           |
|    |     stablecoins   |                    |           |
|                                                         |
|  RESERVES = 100% in fiat currency                       |
+---------------------------------------------------------+

Examples: USDT, USDC, EURC, BUSD

Crypto-Collateralized Stablecoins

Mechanism: Backed by crypto-assets with overcollateralization to absorb volatility.

+---------------------------------------------------------+
|            CRYPTO-COLLATERALIZED STABLECOIN              |
|                                                         |
|  User                    Smart Contract                 |
|    |                         |                          |
|    |  1. Deposits $150 ETH   |                          |
|    |------------------------>|                          |
|    |                         |                          |
|    |  2. Borrows 100 DAI     |                          |
|    |<------------------------|                          |
|    |                         |                          |
|  COLLATERAL = 150% (overcollateralization)              |
|  Liquidation if collateral < 150%                       |
+---------------------------------------------------------+

Examples: DAI, LUSD, sUSD

Algorithmic Stablecoins

Mechanism: Peg maintenance through automatic supply-and-demand mechanisms, without full collateral backing.

Types:

• Seigniorage (automatic minting/burning)
• Rebasing (balance adjustment)
• Fractional-algorithmic (partially collateralized)

Examples: UST (collapsed), FRAX, USDD

Warning: Algorithmic stablecoins have a problematic track record. The UST/LUNA collapse in May 2022 (EUR 40 billion lost) sent shockwaves through the sector.

Commodity-Backed Stablecoins

Mechanism: Each token represents a fixed quantity of a physical asset (gold, oil).

Examples: PAXG (gold), XAUT (gold)

3. MiCA Framework for Stablecoins

MiCA distinguishes between EMT and ART, imposing strict rules since June 2024.

Dual Classification

MiCA distinguishes two categories of stablecoins:

Application of Rules

Implementation timeline:

Stablecoins Outside Scope

Not covered by MiCA:

• Stablecoins qualifying as financial instruments (-> MiFID)
• Stablecoins issued by a central bank (CBDC)
• Stablecoins with very limited use (internal tokens)

4. E-Money Tokens (EMT)

EMTs are single-currency stablecoins requiring banking or e-money authorization.

Definition

"An e-money token is a type of crypto-asset that purports to maintain a stable value by referencing the value of one official currency." -- Article 3(1)(7), MiCA Regulation

Requirements for EMT Issuers

Required status:

• Authorized electronic money institution (EMI)
• Or authorized credit institution

Main obligations:

Thresholds for Significant EMTs

Significance thresholds:

• More than 5 million holders
• Market capitalization > EUR 5 billion
• Transaction volume > EUR 400 million/day

Enhanced requirements for significant EMTs:

• Direct supervision by the EBA
• Enhanced regulatory capital (3% of reserves)
• Recovery and resolution plan
• Enhanced security audits

5. Asset-Referenced Tokens (ART)

ARTs backed by multiple assets follow different rules from EMTs.

Definition

"An asset-referenced token is a type of crypto-asset that purports to maintain a stable value by referencing another value or right, or a combination thereof, including one or more official currencies." -- Article 3(1)(6), MiCA Regulation

Differences from EMTs

Requirements for ART Issuers

Specific authorization:

• Authorization by the competent national authority
• Legal entity established in the EU
• Approved white paper

Asset reserves:

• Constitution of reserves representing the value of the tokens
• Documented reserve policy
• Regular auditing
• Prudent investment of reserves

Significant ARTs

Same thresholds as significant EMTs:

• EBA supervision
• Enhanced prudential requirements
• Transaction limits (EUR 200 million/day for payments)

6. Algorithmic Stablecoins

After the UST collapse, algorithmic stablecoins navigate a regulatory grey area.

MiCA's Position

Uncertain coverage: MiCA does not explicitly address algorithmic stablecoins. Their classification depends on their mechanism:

The Case of FRAX and Others

FRAX (Frax Finance):

• Partially collateralized (variable ratio)
• Uncertain classification under MiCA
• Announced shift toward 100% collateralization

Lessons from UST/LUNA

The May 2022 collapse:

• EUR 40 billion in losses
• Flawed algorithmic mechanism
• Absence of sufficient reserves

Regulatory response: MiCA was strengthened to mandate minimum reserves and stress testing.

7. Requirements for Issuers

Detailed white paper, audited reserves, and robust governance are now mandatory.

Mandatory White Paper

Required content (EMT/ART):

STABLECOIN WHITE PAPER (MiCA)
|
+-- 1. ISSUER INFORMATION
|   +-- Identity, legal structure
|   +-- Authorization/license
|   +-- Governance
|
+-- 2. TOKEN DESCRIPTION
|   +-- Technical characteristics
|   +-- Stability mechanism
|   +-- Holder rights
|
+-- 3. ASSET RESERVE
|   +-- Composition
|   +-- Investment policy
|   +-- Custody and segregation
|   +-- Audits
|
+-- 4. RISKS
|   +-- Risk of losing the peg
|   +-- Counterparty risk
|   +-- Operational risk
|   +-- Regulatory risk
|
+-- 5. REDEMPTION
|   +-- Conditions
|   +-- Timeframes
|   +-- Applicable fees
|
+-- 6. TECHNOLOGY
    +-- Blockchain used
    +-- Smart contracts
    +-- Security

Reserves and Prudence

Reserve investment rules:

• High-quality, liquid assets
• Short maturity
• Diversification
• No lending or staking of reserves (EMT)

Governance

Requirements:

• Competent management body
• Conflict of interest policy
• Business continuity plan
• Annual external audit

8. Impact on Users

MiCA strengthens your rights with guaranteed redemption and consumer protection.

Right to Redemption

EMT:

"Holders of e-money tokens have the right to redeem them at any time at par value." -- Article 45, MiCA

ART: The right to redemption depends on the conditions set out in the white paper. It may be limited or subject to conditions.

Consumer Protection

New rights:

• Clear risk disclosure
• Access to the white paper
• Complaints procedure
• Recourse in case of loss of peg

Stablecoin Availability

Practical impacts:

• Some non-compliant stablecoins withdrawn from the EU
• USDT: uncertain compliance, possible restrictions
• USDC: compliance process underway
• EUR stablecoins: development encouraged

9. Stablecoins Authorized in Europe

EURCV compliant, USDC in progress, USDT uncertain: the European landscape takes shape.

MiCA-Compliant Stablecoins (2025)

Tether (USDT) Situation

Key issues:

• Tether has not yet obtained MiCA authorization
• Reserves historically questioned
• Risk of delisting on European exchanges
• Systemic importance (55% of the market)

Circle and Compliance

Circle's positioning:

• Public commitment to MiCA compliance
• Authorization applications underway
• Regular reserve audits
• Declared European strategy

10. FAQ

General Questions

Q: Can I continue to use USDT in Europe?

A: For the time being, yes, but this depends on Tether obtaining MiCA authorization and on European exchange decisions. Some exchanges may restrict USDT. Monitor announcements closely.

Q: Are USD stablecoins banned in Europe?

A: No, they are not banned. However, issuers must be authorized (EMI or bank) to operate legally in the EU. A USD stablecoin issued by an EU-authorized issuer is permitted.

Q: Is DAI an EMT or an ART?

A: DAI is a special case. It is referenced to the dollar but collateralized by crypto-assets. Its classification under MiCA has not yet been definitively settled. It could be considered an ART.

Practical Questions

Q: How can I verify whether a stablecoin is MiCA-compliant?

A: Consult the register of authorized issuers, which will be published by national authorities and ESMA. Compliant issuers will also publish their authorization status.

Q: What happens if my stablecoin loses its peg?

A: EMTs must be redeemable at par value. In the event of a loss of peg, you retain the right to redemption. For ARTs, the conditions of the white paper apply. In the event of fraud or issuer default, legal recourse is available.

Q: Are stablecoins guaranteed like bank deposits?

A: No, there is no deposit guarantee scheme for stablecoins. However, MiCA mandates reserves and asset segregation. The risk is not zero but is regulated.

Conclusion

Stablecoins are entering an era of regulation with MiCA. This evolution aims to protect users while enabling innovation. Issuers must now meet strict requirements for reserves, transparency, and governance.

Key takeaways:

1. Two MiCA categories: EMT (single currency) and ART (multiple assets)
2. Mandatory authorization: EMI or bank for EMTs
3. Guaranteed reserves: 100% for EMTs
4. Right to redemption: protected for EMTs
5. Transition underway: some stablecoins at risk

Recommendations for users:

• Favor stablecoins from MiCA-compliant issuers
• Diversify across multiple stablecoins
• Monitor regulatory announcements
• Understand the risks of each type
• Do not treat stablecoins as risk-free

The era of unregulated stablecoins is coming to an end in Europe. This evolution, while constraining for some actors, should strengthen confidence in these essential instruments of the crypto ecosystem.

Related Articles - Stablecoins

Continue reading with our stablecoin series:

• USDC vs USDT vs DAI: Comparison -- Choosing the right stablecoin
• EURC and Euro Stablecoins -- Euro-denominated alternatives
• Stablecoin Risks and Guarantees -- Understanding the risks
• MiCA Compliance: Preparation -- For professionals

Additional Resources

Topic	Article
DeFi	Introduction to DeFi: Opportunities and Risks
Lending	Crypto Lending: Opportunities and Risks
DAC8	DAC8: Automatic Exchange of Information
Regulation	France 2026: Financial Sovereignty

Article updated in December 2025. The information presented is educational and does not constitute financial advice. Consult a professional for your investment decisions.