The European System of Central Banks has called for scrapping MiCA’s mandatory bank-deposit thresholds for stablecoin reserves, arguing in a consultation response published Tuesday that large stablecoin deposits concentrated in commercial banks create underappreciated liquidity risks — a striking embrace of a critique that the industry, led by Tether CEO Paolo Ardoino, has been voicing for years.
The ESCB, which comprises the European Central Bank and the national central banks of the eurozone, urged the European Commission to remove rules requiring at least 30% of stablecoin reserves — or 60% for tokens designated as significant — to be held as bank deposits. The proposal came in the ESCB’s formal response to the Commission’s review of the Markets in Crypto-Assets Regulation.
From deposit mandates to liquidity buckets
Rather than forcing issuers to park reserves at credit institutions, the central bankers backed minimum liquidity thresholds for reserve assets based on maturity. The ESCB pointed to draft rules published by the European Banking Authority in 2024 as a template: significant stablecoins would need to hold at least 40% of reserves in assets maturing within one working day and 60% within five working days, while non-significant tokens would face thresholds of 20% and 30% respectively.
The ESCB also flagged overnight reverse repurchase agreements and short-term sovereign bonds as alternative instruments issuers could deploy to meet liquidity needs, giving firms a toolkit that spreads exposure beyond the banking system rather than concentrating it.
The run-risk mechanics
At the heart of the proposal is a contagion concern the crypto industry raised long before regulators did. The existing requirement “creates a direct link between issuers and credit institutions,” the ESCB wrote, and could expose banks to liquidity problems if a stablecoin run forces an issuer to rapidly withdraw deposits — particularly where stablecoin reserves account for a significant share of a bank’s funding.
Risk, the central banks noted, also flows in the opposite direction. They cited the March 2023 collapse of Silicon Valley Bank, which triggered a run on Circle’s USDC after Circle disclosed that 3.3 billion USD of its reserves were held at the failed lender. The episode briefly knocked USDC well below its peg and remains the canonical case study in stablecoin-bank interconnection risk.
The industry’s own version of the warning predates the SVB shock. In an October 2024 interview, Ardoino illustrated the danger with a hypothetical stablecoin holding 10 billion euros in reserves, of which 6 billion euros would sit in bank deposits under MiCA’s significant-issuer rules. If a bank lent out 90% of those funds, only 600 million euros would remain immediately available — a potentially severe liquidity crunch if the issuer suddenly needed billions to satisfy redemptions. Nearly two years later, the ESCB is pointing at substantially the same mechanism.
Enforcement gaps also in focus
Beyond reserve composition, the ESCB used its response to warn of “material challenges” in enforcing MiCA altogether, noting that non-compliant crypto companies can still reach EU customers despite the regulation’s authorization framework. The comment reflects mounting frustration in Brussels and Frankfurt that the EU’s flagship crypto regime has struggled to wall off the bloc from offshore venues serving European users through passive channels.
The intervention arrives at a sensitive moment for the EU’s stablecoin market. Major issuers have spent the past year navigating MiCA’s e-money token rules, with some dollar-pegged assets effectively exiting the bloc while euro-pegged alternatives have scrambled to fill the void. Rewriting the reserve requirements could lower compliance friction for global issuers weighing a European return — or at least remove one of the industry’s loudest objections.
What changes if the proposal sticks
For stablecoin issuers, the shift from deposit quotas to maturity-based liquidity buckets would bring MiCA closer in spirit to money-market fund regulation, where liquidity is managed through asset ladders rather than counterparty mandates. Issuers could diversify reserves across repos, short-dated sovereign paper and deposits, reducing their dependence on any single banking partner.
For banks, the change would slow the growth of a funding source that looked attractive on paper but carried embedded flight risk. And for regulators, it formalizes a lesson from both SVB and the theoretical exercises of industry executives: liquidity that is legally present but practically unavailable at the moment of stress is not liquidity at all.
The Commission’s MiCA review is ongoing, and any legislative amendment would need to clear the EU’s co-legislative process before taking effect. But with the eurosystem’s central banks now aligned with arguments the industry has made since 2024, the direction of travel on stablecoin reserve policy appears to have decisively shifted.
Market snapshot at press time: Bitcoin 85,935 USD, Ethereum 2,750 USD, Solana 117.33 USD.
the reverse repo suggestion is the interesting part. short term sovereigns mean actual collateral moving instead of a bank IOU. healthier plumbing for a 60 percent mandate
the 30 percent deposit mandate, 60 for significant tokens, was always a hidden subsidy to commercial banks. the ESCB calling it a liquidity risk is a rare regulator admitting the incentive was backwards from the start
ESCB quoting the Ardoino argument after years of ignoring it is peak bureaucracy. the rule was bad in 2023, it took a consultation cycle to admit it
Pretty ironic that Ardoino spent years calling the 30% deposit mandate risky and now the ESCB itself agrees. Sometimes the loudest critic is just early.
40% in short maturity buckets actually makes more sense than parking reserves at commercial banks. the eba draft from 2024 was the only sane part of this whole mess
only issue is who values those maturity buckets during a run. one working day liquidity sounds great until every issuer dumps the same bonds at once
central banks marking their own template during a run is the conflict nobody writes down. at least with bank deposits there was a guarantee floor
and everyone marks to the same eba valuation template, so the fire sale becomes coordinated without anyone intending it
everyone marking to the same eba template is exactly how 2020 money market stress played out. regulators keep designing systems where everyone exits through the same door at once
fair, but mmf investors already eat that fire sale risk everywhere. at least the buckets are visible, the deposit version had zero transparency
this, and it removes the weird incentive where rules push EUR stablecoin reserves toward whatever bank pays the best deposit rate
Central banks admitting concentration risk in bank deposits? In my 30 years of watching that would have been unthinkable. The stablecoin tail is wagging the banking dog now.
the SVB reference in the paper is the tell. they watched that march 2023 run and drew the line to stablecoin reserves themselves
the SVB cite is doing real work in that paper. once a central bank names march 2023 in writing, the deposit mandate was always getting cut
wagging the dog is generous, tether alone would rank as a top 20 european bank by deposits. the tail has been a dog for a while now