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Europe’s central banks are pushing for a significant revision of a cornerstone regulation within the European Union’s Markets in Crypto-Assets (MiCA) framework, specifically targeting a rule designed to bolster the safety of stablecoins. This provision, which mandates that issuers hold a substantial portion of their reserves in deposits with EU credit institutions, is now under scrutiny for potentially creating an undesirable and direct link between stablecoin runs and the broader banking system. The European System of Central Banks (ESCB) has put forth a proposal to remove the fixed minimum deposit requirement, advocating instead for a liquidity-based approach that emphasizes the speed at which reserves can be converted to cash. This shift, if adopted, could fundamentally alter the risk profile of stablecoins operating within the EU and reshape their relationship with traditional financial institutions.
The current MiCA regulation, as detailed in technical standards from the European Banking Authority (EBA), imposes stringent liquidity requirements on stablecoin issuers. For stablecoins pegged to official currencies and categorized as non-significant, issuers are currently required to maintain at least 30% of their reserve amounts as deposits with EU credit institutions. This threshold escalates to a more restrictive 60% for significant tokens. The rationale behind this rule was to ensure that stablecoin reserves were held in a secure and readily accessible form, thereby safeguarding token holders during periods of redemption. However, recent analysis and experience have illuminated a potential downside: this mandatory allocation creates a two-way channel for systemic risk.
The Genesis of the Debate: MiCA’s Deposit Floor and its Unintended Consequences
The debate surrounding MiCA’s deposit floor gained significant traction following the banking turmoil experienced in March 2023. During this period, Circle, a prominent stablecoin issuer, disclosed that a portion of its reserves for the USD Coin (USDC) stablecoin was held at Silicon Valley Bank (SVB). The ensuing uncertainty surrounding the accessibility of these funds triggered a temporary loss of confidence in USDC, pressuring its peg to the U.S. dollar. According to an analysis by the European Central Bank (ECB), USDC’s market capitalization experienced a notable decline of 26% within a single month as investors reacted to the perceived risk.
This event underscored a critical vulnerability inherent in the mandatory deposit requirement. While bank deposits provide issuers with immediate liquidity for redemptions, they also represent a claim on the depositing bank. Consequently, the perceived safety and liquidity of a stablecoin’s reserves become intrinsically tied to the financial health of the institutions holding those funds. In times of market stress, a scenario where a stablecoin issuer faces a surge in redemption requests could lead to a mass withdrawal of these bank deposits. What appeared to be stable funding for a bank could then rapidly transform into volatile wholesale money, potentially exacerbating liquidity pressures on the bank itself.
Further elaborating on this dynamic, an ECB speech highlighted how large-scale redemptions could compel stablecoin issuers to rapidly withdraw their reserves, thereby draining a bank’s liquidity. An accompanying ECB working paper added that issuers might tend to concentrate their deposits within a limited number of financial institutions, further amplifying the interconnectedness and potential for contagion. While euro-denominated stablecoins currently represent a smaller segment of the market – with a market capitalization of approximately €450 million in January 2026, compared to roughly $300 billion for dollar-denominated tokens – the policy concern centers on the potential concentration and behavior of these reserve deposits should stablecoin adoption grow significantly within the EU.
The core issue with the fixed quota, as articulated by critics, is the creation of reciprocal exposures. A distressed bank could impair the reserves backing a stablecoin, leading to a loss of confidence and a potential token run. Conversely, a run on a stablecoin could trigger a massive withdrawal of deposits, directly impacting a bank’s funding and liquidity. While the rule aims to improve immediate access to funds under normal market conditions, it inadvertently dictates where stress first manifests in the financial system.
The ESCB’s Proposed Alternative: A Focus on Redemption Timeliness
In response to these concerns, the ESCB has proposed a significant departure from the current MiCA provisions. The reported alternative, which is being submitted as input to the European Commission’s review of the Markets in Crypto-Assets Regulation, advocates for the removal of the fixed minimum deposit floor. Instead, the focus would shift to the redemption timetable, measuring how quickly the entirety of a stablecoin’s reserves can be converted into cash.
Under the ESCB’s proposed framework, for stablecoins pegged to official currencies, reserve safety would be assessed based on the proportion of reserves available within one or five working days. For non-significant tokens, the proposal suggests that at least 20% of reserves should be available within one working day, and 30% within five working days. These thresholds would increase for significant tokens, with at least 40% available within one working day and 60% within five working days. This approach aims to preserve a robust near-cash buffer while granting issuers greater flexibility in how they meet these liquidity requirements, allowing for a broader mix of regulated assets.
This proposed shift from a mandatory asset location to a liquidity-based test represents a fundamental change in regulatory philosophy. It acknowledges that the safety of stablecoin reserves should not solely depend on their physical placement within traditional banking institutions but rather on their inherent liquidity and the issuer’s ability to meet redemption demands promptly.
A Maturity Test: Redefining Reserve Safety and Issuer Economics
The ESCB’s proposed approach fundamentally alters the assessment of reserve safety by replacing a rule about where a set share of reserves must be held with a test of how quickly the entire reserve can be converted into cash. This "maturity test" has several key implications:
| Feature | Current MiCA Framework | Reported ESCB Approach | Main Effect |
|---|---|---|---|
| Bank Deposits | At least 30% for non-significant tokens and 60% for significant tokens | No fixed minimum deposit share | Deposits remain eligible, but issuers gain allocation flexibility. |
| One-Day Liquidity | Part of the wider reserve framework, not explicitly tested as a minimum percentage. | At least 20% for non-significant tokens and 40% for significant tokens | Tests immediate redemption capacity, ensuring rapid access to funds. |
| Five-Day Liquidity | Part of the wider reserve framework, not explicitly tested as a minimum percentage. | At least 30% for non-significant tokens and 60% for significant tokens | Adds a broader near-cash buffer, ensuring continued redemption capacity over a short period. |
| Reserve Exposure | A mandated share sits with commercial banks, creating direct exposure. | More room for short-term securities and reverse repos, diversifying asset allocation. | Bank linkage falls as market exposure rises, potentially reducing direct contagion channels. |
Under the proposed EBA framework, various assets could count towards the liquidity thresholds. This includes withdrawable cash and reverse repurchase agreements (repos) that can be terminated within the specified timeframes. Additionally, certain highly liquid financial instruments would qualify, though short maturity alone would not be sufficient for an asset to be deemed eligible. The EBA’s framework draws on Liquidity Coverage Ratio (LCR) categories to identify eligible instruments. Core Level 1 sovereign and public-sector assets, for instance, are placed in a 0% reference-haircut category, while extremely high-quality covered bonds might carry a reference haircut of at least 7%.
Crucially, for reserve valuation under this new framework, the standard LCR haircuts would be disapplied. Instead, the rules would mandate overcollateralization to cover potential market-value risks. This means that even highly liquid assets might need to be held in excess of their face value to account for potential price fluctuations.
Further safeguards are proposed to mitigate concentration risk. These draft safeguards would cap an issuer’s deposit at any single systemically important bank at 25% of its total reserves and at 1.5% of that bank’s total assets. Similarly, qualifying securities and money-market instruments in the 0% reference-haircut category would be capped at 35% of reserves when sourced from a single issuer. These limits aim to prevent excessive reliance on any single financial counterparty.
One of the potential economic benefits of this shift for issuers could be improved profitability. Short-term sovereign paper or repo positions may offer higher yields compared to traditional bank deposits. Consequently, this regulatory change could lead to a redistribution of reserves, income, and risk towards government debt and funding markets. Issuers would still be required to adhere to stringent liquidity, asset-quality, concentration, and overcollateralization controls, ensuring that the pursuit of higher yields does not compromise overall stability.
The proposed shift could also reduce the direct exposure of stablecoin issuers to the failure of a specific deposit-taking bank. By holding short-term sovereign debt or engaging in overnight reverse repos, an issuer has less direct recourse to the failure of a particular commercial bank. In the event of heavy redemptions, the initial trigger would be less likely to be the withdrawal of a large wholesale deposit from a struggling bank.
However, this new framework is not without its own set of risks. Large-scale redemptions could still force issuers to sell securities or unwind repo positions. If holdings are concentrated in specific assets or issuers, a stablecoin stress event could spill over into sovereign or funding markets. Conversely, a sharp decline in bond prices could erode the value of reserves, weakening the stablecoin’s backing. The ECB’s analysis of stablecoin demand for sovereign debt suggests that the ultimate impact would depend on various factors, including the issuer type, its asset mix, and the sector from which the funds used to acquire the token originated.
Therefore, reserve design under this new model would still involve an allocation of risk, rather than its complete abolition. A maturity-based rule might reduce the direct link to the banking system, but its overall safety would hinge on the credit quality, market depth, and concentration of the assets used to meet redemption requests.
Tether’s Perspective and the Broader Regulatory Landscape
The reported stance of the ESCB appears to align with concerns previously voiced by major stablecoin issuers, notably Tether. Paolo Ardoino, CEO of Tether, publicly echoed warnings about MiCA’s mandatory bank-deposit share, arguing that concentrating reserves in commercial banks could transmit distress between an issuer and a lender. Tether has consistently advocated for a more diversified approach to reserve management, emphasizing the importance of liquidity and accessibility over mandated deposit locations.
Tether has also expressed broader concerns regarding MiCA, including potential restrictions on non-euro-denominated stablecoins and other aspects of the framework. The company has previously wound down its euro-backed EURT stablecoin, calling for a more risk-averse regulatory environment. Notably, Tether’s flagship USDT stablecoin currently operates outside the scope of MiCA authorization, indicating the company’s ongoing assessment of the EU regulatory landscape.
It is important to clarify that the proposed removal of the deposit floor would not dismantle the entire MiCA regulatory regime for stablecoins. Issuers seeking authorization under MiCA would still be subject to a comprehensive set of requirements covering authorization procedures, robust governance structures, capital adequacy, regular audits, segregation of reserves, clear redemption policies, and prudential supervision by relevant authorities.
Furthermore, this potential regulatory shift would not automatically confer EU authorization on USDT or resolve Tether’s broader objections to certain MiCA features. The more significant consequence of the proposed change would lie in the reallocation of control over reserve management. Commercial banks could see a reduction in their guaranteed share of official-currency reserves, while stablecoin issuers would gain greater discretion in choosing from a regulated menu of assets, including deposits, short-term securities, and repo arrangements. This could lead to a greater flow of assets and yield into sovereign-debt and funding markets.
Ultimately, Europe’s decision on this matter hinges on its preferred architecture for redemption safety. The current deposit quota emphasizes the physical location of reserves, anchoring a significant portion within the banking sector. In contrast, the proposed maturity test prioritizes the speed at which a diversified reserve can be converted into cash. The reported ESCB position clearly favors the latter model, while crucially retaining stringent limitations on asset eligibility, concentration, and collateral.
This framework has the potential to weaken one critical link in the chain of financial contagion. However, its ultimate success will depend on the ability of issuers to meet redemption demands effectively under stressed market conditions, without inadvertently triggering disorderly asset sales elsewhere in the broader financial system. The European Commission’s consultation on the MiCA review, which runs until September 30th, will be closely watched by the crypto and traditional finance industries as it could pave the way for a future legislative proposal that reshapes the stablecoin landscape in Europe.
